Patent Application
20200325418
This application contains a Sequence Listing in computer readable form, which is incorporated herein by reference.
The present invention relates to novel compositions comprising an alpha amylase and a protease. The compositions of the invention are suitable as e.g. cleaning or detergent compositions, such as laundry detergent compositions and dish wash compositions, including automatic dish wash compositions.
Enzymes have been used within the detergent industry as part of washing formulations for many decades. Proteases are from a commercial perspective the most relevant enzyme in such formulations, but other enzymes including amylases, lipases, cellulases, hemicellulases or mixtures of enzymes are also often used. Alpha-amylases (alpha-1,4-glucan-4-glucanohydrolases, E.C. 3.2.1.1) constitute a group of enzymes which catalyse hydrolysis of starch and other linear and branched 1,4-gluosidic oligo- and polysaccharides.
One family of proteases, which is often used in detergents, are the subtilases. This family has previously been further grouped into 6 different sub-groups by Siezen RJ and Leunissen JAM, 1997, Protein Science, 6, 501-523. One of these sub-groups is the Subtilisin family which includes subtilases such as BPN′, Subtilisin 309 (SAVINASE®, Novozymes NS (SEQ ID NO: 6)), Subtilisin Carlsberg (ALCALASE®,Novozymes NS), Subtilisin S41 (a subtilase from the psychrophilic Antarctic Bacillus TA41, Davail S et al. 1994, The Journal of Biological Chemistry, 269(26), 99. 17448-17453) and Subtilisin S39 (a subtilase from the psychrophilic Antarctic Bacillus TA39, Narinx E et al. 1997, Protein Engineering, 10 (11), pp. 1271-1279).
Bacillus alpha-amylases, such as Termamyl (SEQ ID NO:10), AA560 (SEQ ID NO: 8 herein; WO 2000/060060) and SP707 (SEQ ID NO: 9 herein; Tsukamoto et al., 1988, Biochem. Biophys. Res. Comm. 151:25-31) form a particular group of alpha-amylases that have found use in detergents. These amylases have been modified to improve the stability in detergents. For example, WO 96/23873 discloses deletion mutants of alpha-amylases SP690, SP722 and SP707 (see SEQ ID NOs: 1, 2 and 7 of WO 96/23873) to improve the stability of these amylases. The wild-type amylase of the variant used in the present invention has been described in WO 2000/060058.
To improve the cost and/or the performance of enzymes there is an ongoing search for enzymes with altered properties, such as increased activity at low temperatures, increased stability, increased specific activity at a given pH, altered Ca2+ dependency, increased stability in the presence of other detergent ingredients (e.g. bleach, surfactants etc.) etc.
Detergent compositions have been described, but there is a continued need for improved detergent compositions, wherein the enzymes within the detergent compositions are able to act synergistically in cleaning performance. Thus, it is an objective of the present invention to provide such detergent compositions.
The present invention relates to detergent compositions comprising:
The present invention relates also to a method of dishwashing comprising adding said detergent composition in a detergent composition compartment in said automatic dishwashing machine.
The present invention relates also to a method of laundering comprising laundering a fabric with a detergent composition according to the invention.
The term “alpha-amylase” means an alpha-amylase having alpha-amylase activity, i.e. the activity of alpha-1,4-glucan-4-glucanohydrolases, E.C. 3.2.1.1, which constitute a group of enzymes, catalysing hydrolysis of starch and other linear and branched 1,4-glucosidic oligo- and polysaccharides. For purposes of alpha-amylases present in the detergent compositions of the present invention, alpha-amylase activity may be determined as described in Example 1 below. The alpha-amylases described herein comprise or consist of an amino acid sequence of SEQ ID NO: 1 or a fragment thereof which exhibits alpha-amylase activity.
The term “protease” is defined herein as an enzyme that hydrolyses peptide bonds. It includes any enzyme belonging to the EC 3.4 enzyme group (including each of the thirteen subclasses thereof). The EC number refers to Enzyme Nomenclature 1992 from NC-IUBMB, Academic Press, San Diego, Calif., including supplements 1-5 published in Eur. J. Biochem. 1994, 223, 1-5; Eur. J. Biochem. 1995, 232, 1-6; Eur. J. Biochem. 1996, 237, 1-5; Eur. J. Biochem. 1997, 250, 1-6; and Eur. J. Biochem. 1999, 264, 610-650; respectively. The term “subtilases” refer to a sub-group of serine protease according to Siezen et al., Protein Engng. 4 (1991) 719-737 and Siezen et al. Protein Science 6 (1997) 501-523. Serine proteases or serine peptidases is a subgroup of proteases characterised by having a serine in the active site, which forms a covalent adduct with the substrate. Further the subtilases (and the serine proteases) are characterised by having two active site amino acid residues apart from the serine, namely a histidine and an aspartic acid residue. The subtilases may be divided into 6 sub-divisions, i.e. the Subtilisin family, the Thermitase family, the Proteinase K family, the Lantibiotic peptidase family, the Kexin family and the Pyrolysin family. The term “protease activity” means a proteolytic activity (EC 3.4). Proteases of the invention are endopeptidases (EC 3.4.21). For purposes of the present invention, protease activity is determined according to the procedure described in Example 1 below. The proteases described herein comprise or consist of an amino acid sequence of SEQ ID NO: 2, 3, 4 or 5, or a fragment or variant thereof which exhibits protease activity.
The term “lipase” means a lipase having lipase activity. The lipase defined herein may be a carboxylic ester hydrolase EC 3.1.1,−, which includes activities such as EC 3.1.1.3 triacylglycerol lipase, EC 3.1.1.4 phospholipase A2, EC 3.1.1.5 lysophopholipase, EC 3.1.1.26 galactolipase, EC 3.1.1.32 phospholipase A1, EC 3.1.1.73 feruloyl esterase.
The term “protease variant” (or “variant” when used in the context of a protease) means a protease having protease activity comprising an alteration, i.e., a substitution, insertion, and/or deletion, preferably substitution, at one or more (or one or several) positions compared to its parent which is a protease having the identical amino acid sequence of said variant but not having the alterations at one or more of said specified positions. A substitution means a replacement of an amino acid occupying a position with a different amino acid; a deletion means removal of an amino acid occupying a position; and an insertion means adding amino acids e.g. 1 to 10 amino acids, preferably 1-3 amino acids adjacent to an amino acid occupying a position. Amino acid substitutions may exchange a native amino acid for another naturally-occurring amino acid, or for a non-naturally-occurring amino acid derivative. In one embodiment, the variant is a deletion variant, for example a fragment of a parent protease. The protease variants have at least 20%, e.g., at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 95%, or at least 100% of the protease activity of the mature parent protease from which they have been derived.
The term “protease fragment” (or “fragment” when used in the context of a protease) means a protease having protease activity comprising a deletion at one or more (or one or several) positions at the N- and/or C-terminus as compared to its parent which is a protease having the identical amino acid sequence of said fragment but not having the N- and/or C-terminal deletion. Thus, a “protease fragment” is a type of protease variant and may be a fragment of any one of SEQ ID NOs: 2 to 5. The term “alpha-amylase fragment” is to be interpreted accordingly, as an alpha-amylase having alpha-amylase activity comprising a deletion at one or more (or one or several) positions at the N- and/or C-terminus as compared to its parent which is an alpha-amylase comprising or consisting of the amino acid sequence of SEQ ID NO:1. Suitable protease fragments have protease activity and comprise or consist of an amino acid sequence comprising at least 100 contiguous amino acids of any one of SEQ ID NO:2 to 5, for example at least 150 contiguous amino acids, 200 contiguous amino acids, 225 contiguous amino acids, or at least 250 contiguous amino acids of any one of SEQ ID NO:2 to 5. Suitable alpha-amylase fragments have at least 20%, e.g., at least 40%, at least 50%, at least 60%, at least 70%, at least 80%, at least 90%, at least 95%, or at least 100% of the alpha-amylase activity of the mature parent alpha-amylase from which they have been derived.
The term “isolated fragment or variant” means a fragment or variant that is modified by the hand of man. In one aspect, the variant is at least 1% pure, e.g., at least 5% pure, at least 10% pure, at least 20% pure, at least 40% pure, at least 60% pure, at least 80% pure, and at least 90% pure, as determined by SDS PAGE.
The term “parent protease” means a protease to which an alteration is made to produce the protease variants, including fragments. Thus, the parent protease is a protease having the identical amino acid sequence of said protease variant but not having the alterations at one or more of said specified positions. It will be understood, that in the present context the expression “having identical amino acid sequence” relates to 100% sequence identity. The parent protease may be a naturally occurring (wild-type) polypeptide or a variant thereof. In a particular embodiment, the parent is a protease with at least 70%, at least 72%, at least 73%, at least 74%, at least 75%, at least 80%, at least 81%, at least 82%, at least 83%, at least 84%, at least 85%, at least 90%, at least 91%, at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, e.g. at least 99.1%, at least 99.2%, at least 99.3%, at least 99.4%, at least 99.5%, at least 99.6 or 100% identity to a polypeptide with any one of SEQ ID NOs: 2 to 5. The term “parent alpha-amylase” refers to the alpha-amylase to which a deletion is made to produce the alpha-amylase fragment. In an embodiment, the parent alpha-amylase is an alpha-amylase as defined in SEQ ID NO: 1.
The term “wild-type protease” means a protease expressed by a naturally occurring organism, such as a bacterium, archaea, yeast, fungus, plant or animal found in nature.
The term “wild-type alpha-amylase” means an alpha-amylase as expressed by a naturally occurring microorganism, such as a bacterium, yeast, or filamentous fungus found in nature.
The term “nucleic acid construct” means a nucleic acid molecule, either single- or double-stranded, which is isolated from a naturally occurring gene or is modified to contain segments of nucleic acids in a manner that would not otherwise exist in nature or which is synthetic. The term nucleic acid construct is synonymous with the term “expression cassette” when the nucleic acid construct contains the control sequences required for expression of a coding sequence of the present invention.
The term “operably linked” means a configuration in which a control sequence is placed at an appropriate position relative to the coding sequence of a polynucleotide such that the control sequence directs the expression of the coding sequence.
The term “control sequences” means all components necessary for the expression of a polynucleotide encoding a protease or alpha-amylase of the present invention. Each control sequence may be native or foreign to the polynucleotide encoding the variant or native or foreign to each other. Such control sequences include, but are not limited to, a leader, polyadenylation sequence, propeptide sequence, promoter, signal peptide sequence, and transcription terminator. At a minimum, the control sequences include a promoter, and transcriptional and translational stop signals. The control sequences may be provided with linkers for the purpose of introducing specific restriction sites facilitating ligation of the control sequences with the coding region of the polynucleotide encoding a protease or alpha-amylase.
The term “expression” includes any step involved in the production of the protease or alpha-amylase including, but not limited to, transcription, post-transcriptional modification, translation, post-translational modification, and secretion.
The term “expression vector” means a linear or circular DNA molecule that comprises a polynucleotide encoding a protease or alpha-amylase and is operably linked to additional nucleotides that provide for its expression.
The term “transcription promoter” is used for a promoter which is a region of DNA that facilitates the transcription of a particular gene. Transcription promoters are typically located near the genes they regulate, on the same strand and upstream (towards the 5′ region of the sense strand).
The term “transcription terminator” is used for a section of the genetic sequence that marks the end of gene or operon on genomic DNA for transcription.
The term “host cell” means any cell type that is susceptible to transformation, transfection, transduction, and the like with a nucleic acid construct or expression vector comprising a polynucleotide of the present invention. The term “host cell” encompasses any progeny of a parent cell that is not identical to the parent cell due to mutations that occur during replication.
It is within the knowledge of the skilled person to know how to align amino acid sequences in order to determine which amino acid in a particular position referred to herein “corresponds to” another amino acid sequence not listed herein. Thus, the term “position corresponding to” as used herein, is well-known within the art. The relatedness between two amino acid sequences or between two nucleotide sequences is described by the parameter “sequence identity”. For purposes of the present invention, the degree of sequence identity between two amino acid sequences is determined using the Needleman-Wunsch algorithm (Needleman and Wunsch, 1970, J. Mol. Biol. 48: 443-453) as implemented in the Needle program of the EMBOSS package (EMBOSS: The European Molecular Biology Open Software Suite, Rice et al., 2000, Trends Genet. 16: 276-277), preferably version 3.0.0 or later. The optional parameters used are gap open penalty of 10, gap extension penalty of 0.5, and the EBLOSUM62 (EMBOSS version of BLOSUM62) substitution matrix. The output of Needle labelled “longest identity” (obtained using the—nobrief option) is used as the percent identity and is calculated as follows:
(Identical Residues×100)/(Length of Alignment−Total Number of Gaps in Alignment)
The term “improved wash performance” is defined herein as a detergent composition displaying an increased wash performance relative to the wash performance of a similar detergent composition without a protease or an alpha-amylase. Thus, it is believed that the detergent composition comprising both a protease and an alpha-amylase has a beneficial effect on wash performance. The protease and alpha-amylase may show synergy and thereby provide a detergent composition having an even further improved wash performance when compared to a detergent composition comprising only one of the enzymes. The term “wash performance” includes wash performance in laundry but also e.g. in dish wash. The wash performance may be quantified as described under the definition of “wash performance” herein. It will be appreciated by persons skilled in the art that the enhanced wash performance may be achieved under only some or perhaps all wash conditions, for example at wash temperatures of 40° C. or higher (such as at 40° C. and/or at 50° C.) and/or with or without the presence of bleach.
The term “wash cycle” is defined herein with respect to dishwashing as a washing operation wherein dishware are exposed to the wash liquor for a period of time by circulating the wash liquor and spraying the wash liquor onto the dishware in order to clean the dishware and finally the superfluous wash liquor is removed. A wash cycle may be repeated one, two, three, four, five or even six times at the same or at different temperatures. Hereafter the dishware is generally rinsed and dried. One of the wash cycles can be a soaking step, where the dishware is left soaking in the wash liquor for a period.
The term “wash liquor” is defined herein as the solution or mixture of water and detergent components.
The term “wash performance” with respect to automatic dishwashing is defined herein as the ability of an automatic dishwashing detergent composition to remove soil present on dishware to be cleaned during washing. The wash performance may be measured by inspecting the washed dishware, light reflectance (460 nm) or by measuring weight to determine how much of the soil has been removed. This can be done by measuring the difference in weight on plates, tiles or similar. Wash performance may be determined in automatic dishwashing as described in Example 2. Laundry wash performance may be determined using an automatic mechanical stress assay (AMSA) as described in Example 1.
The term “wash time” with respect to automatic dishwashing is defined herein as the time it takes for the entire washing process; i.e. the time for the wash cycle(s) and rinse cycle(s) together.
The term “detergent composition”, includes unless otherwise indicated, granular or powder-form all-purpose or heavy-duty washing agents, especially cleaning detergents; liquid, gel or paste-form all-purpose washing agents, especially the so-called heavy-duty liquid (HDL) types; liquid fine-fabric detergents; hand dishwashing agents or light duty dishwashing agents, especially those of the high-foaming type; machine dishwashing agents, including the various tablet, granular, liquid and rinse-aid types for household and institutional use; liquid cleaning and disinfecting agents, including antibacterial hand-wash types, cleaning bars, soap bars, mouthwashes, denture cleaners, car or carpet shampoos, bathroom cleaners; hair shampoos and hair-rinses; shower gels, foam baths; metal cleaners; as well as cleaning auxiliaries such as bleach additives and “stain-stick” or pre-treat types. The terms “detergent composition” and “detergent formulation” are used in reference to mixtures which are intended for use in a wash medium for the cleaning of soiled objects. In some embodiments, the term is used in reference to laundering fabrics and/or garments (e.g., “laundry detergents”). In alternative embodiments, the term refers to other detergents, such as those used to clean dishes, cutlery, etc. (e.g., “dishwashing detergents”). The term “automatic dishwashing detergent composition” refers to compositions comprising detergent components, which composition is intended for cleaning dishware such as plates, cups, glasses, bowls, cutlery such as spoons, knives, forks, serving utensils, ceramics, plastics, metals, china, glass and acrylics in a dishwashing machine. It is not intended that the present invention be limited to any particular detergent formulation or composition. The term “detergent composition” is not intended to be limited to compositions that contain surfactants. It is intended that in addition to the enzymes herein described, the detergents compositions may comprise, e.g. one or more additional components selected from stabilizing agents, surfactants, hydrotopes, builders, co-builders, chelating agents, bleaching systems, bleach activators, polymers and fabric-hueing agents.
The term “concentrate” or “additive”, used in the context of the detergent compositions of the invention, encompasses concentrated enzyme compositions (comprising a protease and/or an alpha-amylase as defined herein) which may be used in the production of the detergent compositions of the invention. Such concentrates and additives may optionally comprise a surfactant.
The term “fabric” encompasses any textile material. Thus, it is intended that the term encompass garments, as well as fabrics, yarns, fibres, non-woven materials, natural materials, synthetic materials, and any other textile material.
The term “textile” refers to woven fabrics, as well as staple fibres and filaments suitable for conversion to or use as yarns, woven, knit, and non-woven fabrics. The term encompasses yarns made from natural, as well as synthetic (e.g., manufactured) fibres. The term, “textile materials” is a general term for fibres, yarn intermediates, yarn, fabrics, and products made from fabrics (e.g., garments and other articles).
The term “non-fabric detergent compositions” include non-textile surface detergent compositions, including but not limited to compositions for hard surface cleaning, such as dishwashing detergent compositions, oral detergent compositions, denture detergent compositions, and personal cleansing compositions.
The term “effective amount of enzyme” refers to the quantity of enzyme necessary to achieve the enzymatic activity required in the specific application, e.g., in a defined detergent composition. Such effective amounts are readily ascertained by one of ordinary skill in the art and are based on many factors, such as the particular enzyme used, the cleaning application, the specific composition of the detergent composition, and whether a liquid or dry (e.g., granular, bar) composition is required, and the like. The term “effective amount” of an enzyme refers to the quantity of enzyme described hereinbefore that achieves a desired level of enzymatic activity, e.g., in a defined detergent composition. In one embodiment, the effective amount of a protease is the same as the effective amount of an alpha-amylase. In another embodiment, the effective amount of a protease is different to the effective amount of an alpha-amylase, e.g., the effective amount of a protease may be more or may be less than the effective amount of an alpha-amylase.
The term “water hardness” or “degree of hardness” or “dH” or “° dH” as used herein refers to German degrees of hardness. One degree is defined as 10 milligrams of calcium oxide per litre of water.
The term “relevant washing conditions” is used herein to indicate the conditions, particularly washing temperature, time, washing mechanics, detergent concentration, type of detergent and water hardness, actually used in households in a detergent market segment.
The term “adjunct materials” means any liquid, solid or gaseous material selected for the particular type of detergent composition desired and the form of the product (e.g., liquid, granule, powder, bar, paste, spray, tablet, gel, or foam composition), which materials are also preferably compatible with the enzymes used in the composition. In some embodiments, granular compositions are in “compact” form, while in other embodiments, the liquid compositions are in a “concentrated” form.
The term “stain removing enzyme” as used herein, describes an enzyme that aids the removal of a stain or soil from a fabric or a hard surface. Stain removing enzymes act on specific substrates, e.g., protease on protein, amylase on starch, lipase and cutinase on lipids (fats and oils), pectinase on pectin and hemicellulases on hemicellulose. Stains are often depositions of complex mixtures of different components which either results in a local discolouration of the material by itself or which leaves a sticky surface on the object which may attract soils dissolved in the washing liquor thereby resulting in discolouration of the stained area. When an enzyme acts on its specific substrate present in a stain the enzyme degrades or partially degrades its substrate thereby aiding the removal of soils and stain components associated with the substrate during the washing process. For example, when a protease acts on a grass stain it degrades the protein components in the grass and allows the green/brown colour to be released during washing.
The term “reduced amount” means in this context that the amount of the component is smaller than the amount which would be used in a reference process under otherwise the same conditions. In a preferred embodiment the amount is reduced by, e.g., at least 5%, such as at least 10%, at least 15%, at least 20% or as otherwise herein described.
The term “low detergent concentration” system includes detergents where less than about 800 ppm of detergent components is present in the wash water. Asian, e.g., Japanese detergents are typically considered low detergent concentration systems.
The term “medium detergent concentration” system includes detergents wherein between about 800 ppm and about 2000 ppm of detergent components is present in the wash water. North American detergents are generally considered to be medium detergent concentration systems.
The term “high detergent concentration” system includes detergents wherein greater than about 2000 ppm of detergent components is present in the wash water. European detergents are generally considered to be high detergent concentration systems.
The term “liquid laundry detergent composition” as used herein refers to a detergent composition which is in a stabilized liquid form and used in a method for laundering a fabric. Thus, the detergent composition has been formulated to be in fluid form.
The term “powder laundry detergent composition” as used herein refers to a detergent composition which is in a solid form, such as a granulate, non-dusting granulate or powder, which is used in a method for laundering a fabric.
The term “liquid dishwash detergent composition” as used herein refers to a detergent composition which is in a stabilized liquid form and used in dishwash. Dishwash may be any kind of dishwash, such as manual dishwash and such as automated dishwash (ADW).
The term “powder dishwash detergent composition” as used herein refers to a detergent composition which is in a solid form, such as a granulate, powder or compact unit and used in dishwash. A powder dishwash detergent composition is typically used in automated dishwash, but the used is not limited to such ADW, and may also be intended for used in any other kind of dishwash, such as manual dishwash.
Conventions for Designation of Variants including Fragments
For purposes of the present invention, the mature polypeptides disclosed in SEQ ID NO: 1, 2, 3, 4 and 5 are used to determine the corresponding amino acid residue in another polypeptide, such as a variant or fragment. The amino acid sequence of another polypeptide is aligned with the mature polypeptide disclosed in SEQ ID NO: 1, 2, 3, 4 or 5 depending on whether it is a protease or an alpha-amylase, and based on the alignment, the amino acid position number corresponding to any amino acid residue in the mature polypeptide disclosed in SEQ ID NO: 1, 2, 3, 4 or 5 is determined using the Needleman-Wunsch algorithm (Needleman and Wunsch, 1970, J. Mol. Biol. 48: 443-453) as implemented in the Needle program of the EMBOSS package (EMBOSS: The European Molecular Biology Open Software Suite, Rice et al., 2000, Trends Genet. 16: 276-277), preferably version 5.0.0 or later. The parameters used are gap open penalty of 10, gap extension penalty of 0.5, and the EBLOSUM62 (EMBOSS version of BLOSUM62) substitution matrix.
Identification of the corresponding amino acid residue in another protease can be determined by an alignment of multiple polypeptide sequences using several computer programs including, but not limited to, MUSCLE (multiple sequence comparison by log-expectation; version 3.5 or later; Edgar, 2004, Nucleic Acids Research 32: 1792-1797), MAFFT (version 6.857 or later; Katoh and Kuma, 2002, Nucleic Acids Research 30: 3059-3066; Katoh et al., 2005, Nucleic Acids Research 33: 511-518; Katoh and Toh, 2007, Bioinformatics 23: 372-374; Katoh et al., 2009, Methods in Molecular Biology 537: 39-64; Katoh and Toh, 2010, Bioinformatics 26: 1899-1900), and EMBOSS EMMA employing ClustalW (1.83 or later; Thompson et al., 1994, Nucleic Acids Research 22: 4673-4680), using their respective default parameters.
When the other protease has diverged from the mature polypeptide of SEQ ID NO: 2, 3, 4 or 5 such that traditional sequence-based comparison fails to detect their relationship (Lindahl and Elofsson, 2000, J. Mol. Biol. 295: 613-615), other pairwise sequence comparison algorithms may be used. Greater sensitivity in sequence-based searching can be attained using search programs that utilize probabilistic representations of polypeptide families (profiles) to search databases. For example, the PSI BLAST program generates profiles through an iterative database search process and is capable of detecting remote homologs (Atschul et al., 1997, Nucleic Acids Res. 25: 3389-3402). Even greater sensitivity can be achieved if the family or superfamily for the polypeptide has one or more representatives in the protein structure databases. Programs such as GenTHREADER (Jones, 1999, J. Mol. Biol. 287: 797-815; McGuffin and Jones, 2003, Bioinformatics 19: 874-881) utilize information from a variety of sources (PSI BLAST, secondary structure prediction, structural alignment profiles, and solvation potentials) as input to a neural network that predicts the structural fold for a query sequence. Similarly, the method of Gough et al., 2000, J. Mol. Biol. 313: 903-919, can be used to align a sequence of unknown structure with the superfamily models present in the SCOP database. These alignments can in turn be used to generate homology models for the polypeptide, and such models can be assessed for accuracy using a variety of tools developed for that purpose.
For proteins of known structure, several tools and resources are available for retrieving and generating structural alignments. For example the SCOP super families of proteins have been structurally aligned, and those alignments are accessible and downloadable. Two or more protein structures can be aligned using a variety of algorithms such as the distance alignment matrix (Holm and Sander, 1998, Proteins 33: 88-96) or combinatorial extension (Shindyalov and Bourne, 1998, Protein Engineering 11: 739-747), and implementation of these algorithms can additionally be utilized to query structure databases with a structure of interest in order to discover possible structural homologs (e.g., Holm and Park, 2000, Bioinformatics 16: 566-567).
It is within the knowledge of the skilled person to determine which alignment tool to use when corresponding amino acid positions must be identified. Therefore, it is contemplated that any available alignment tool that the skilled person find suitable may be used in the context of the present invention.
In describing the protease variants described herein, the nomenclature described below is adapted for ease of reference. The accepted IUPAC single letter or three letters amino acid abbreviations are employed.
Substitutions: For an amino acid substitution, the following nomenclature is used: Original amino acid, position, substituted amino acid. Accordingly, the substitution of threonine at position 226 with alanine is designated as “Thr226Ala” or “T226A”. Multiple mutations (or alterations) are separated by addition marks (“+”), e.g, “Gly205Arg+Ser411Phe” or “G205R+S411F”, representing substitutions at positions 205 and 411 of glycine (G) with arginine (R) and serine (S) with phenylalanine (F), respectively. The Figures also use (“/”), e.g, “E492T/N503D” this should be viewed as interchangeable with (“+”).
Deletions: For an amino acid deletion, the following nomenclature is used: Original amino acid, position*. Accordingly, the deletion of glycine at position 195 is designated as “Gly195*” or “G195*”. Multiple deletions are separated by addition marks (“+”), e.g, “Gly195*+Ser411*” or “G195*+S411*”.
Insertions: As disclosed above, an insertion may be to the N-side (‘upstream’, ‘X-1’) or C-side (‘downstream’, ‘X+1’) of the amino acid occupying a position (‘the named (or original) amino acid’, ‘X’).
For an amino acid insertion to the C-side (‘downstream’, ‘X+1’) of the original amino acid (‘X’), the following nomenclature is used: Original amino acid, position, original amino acid, inserted amino acid. Accordingly the insertion of lysine after glycine at position 195 is designated “Gly195GlyLys” or “G195GK”. An insertion of multiple amino acids is designated [Original amino acid, position, original amino acid, inserted amino acid #1, inserted amino acid #2; etc.]. For example, the insertion of lysine and alanine after glycine at position 195 is indicated as “Gly195GlyLysAla” or “G195GKA”.
In such cases the inserted amino acid residue(s) are numbered by the addition of lower case letters to the position number of the amino acid residue preceding the inserted amino acid residue(s). In the above example, the sequence would thus be:
For an amino acid insertion to the N-side (‘upstream’, ‘X-1’) of the original amino acid (X), the following nomenclature is used: Original amino acid, position, inserted amino acid, original amino acid. Accordingly the insertion of lysine (K) before glycine (G) at position 195 is designated “Gly195LysGly” or “G195KG”. An insertion of multiple amino acids is designated [Original amino acid, position, inserted amino acid #1, inserted amino acid #2; etc., original amino acid]. For example, the insertion of lysine (K) and alanine (A) before glycine at position 195 is indicated as “Gly195LysAlaGly” or “G195KAG”. In such cases the inserted amino acid residue(s) are numbered by the addition of lower case letters with prime to the position number of the amino acid residue following the inserted amino acid residue(s). In the above example, the sequence would thus be:
Multiple alterations: Variants comprising multiple alterations are separated by addition marks (“+”), e.g, “Arg170Tyr+Gly195Glu” or “R170Y+G195E” representing a substitution of arginine and glycine at positions 170 and 195 tyrosine and glutamic acid, respectively.
Different alterations: Where different alterations can be introduced at a position, the different alterations are separated by a comma, e.g, “Arg170Tyr,Glu” represents a substitution of arginine at position 170 with tyrosine or glutamic acid. Thus, “Tyr167Gly,Ala+Arg170Gly,Ala” designates the following variants: “Tyr167Gly+Arg170Gly”, “Tyr167Gly+Arg170Ala”, “Tyr167Ala+Arg170Gly”, and “Tyr167Ala+Arg170Ala”.
In one aspect, the invention relates to a detergent composition comprising:
Thus, in one embodiment, the polypeptide having alpha-amylase activity consists of an amino acid sequence of SEQ ID NO:1. The alpha-amylase of SEQ ID NO:1 is a deletion mutant of the AAI10 amylase of Bacillus sp of SEQ ID NO:7, in which amino acids 183 and 184 are deleted.
In an alternative embodiment, the polypeptide having alpha-amylase activity consists of a fragment of an amino acid sequence of SEQ ID NO:1. Suitable fragments may comprise or consist of an amino acid sequence comprising at least 350 contiguous amino acids of SEQ ID NO:1, for example at least 400 contiguous amino acids, 450 contiguous amino acids, 475 contiguous amino acids or at least 480 contiguous amino acids of SEQ ID NO:1. Suitable fragments may have an amino acid sequence identity of at least 80% compared to SEQ ID NO:1, for example at least 85%, at least 90% or at least 95% sequence identity compared to SEQ ID NO:1.
A second component of the detergent compositions of the invention is a polypeptide having protease activity. In an embodiment, the protease may be a polypeptide comprising or consisting of a parent protease of any one of SEQ ID NOS: 2 to 5, or a variant thereof. Suitable variants may have an amino acid sequence identity of at least 80% compared to any one of SEQ ID NOS: 2 to 5, for example at least 85%, at least 90% or at least 95% sequence identity compared to any one of SEQ ID NOS: 2 to 5. Thus, the number of modifications (alterations and/or deletions) in said variant relative to the amino acid sequence of any one of SEQ ID NOS: 2 to 5 may be from 1 to 20, for example 1 to 10 and 1 to 5, such as 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 modifications (alterations and/or deletions). In an embodiment, the protease is as defined in any one of SEQ ID NOS: 2 to 4.
Alternative proteases include those of bacterial, fungal, plant, viral or animal origin e.g. vegetable or microbial origin. Microbial origin is preferred. Chemically modified or protein engineered mutants are included. The protease may be an alkaline protease, such as a serine protease or a metalloprotease. A serine protease may for example be of the S1 family, such as trypsin, or the S8 family such as Subtilisin. A metalloprotease protease may for example be a thermolysin from e.g. family M4 or other metalloprotease such as those from M5, M7 or M8 families. A suitable metalloprotease is as defined in SEQ ID NO: 13.
The term “subtilases” refers to a sub-group of serine protease according to Siezen et al., Protein Engng. 4 (1991) 719-737 and Siezen et al. Protein Science 6 (1997) 501-523. Serine proteases are a subgroup of proteases characterized by having a serine in the active site, which forms a covalent adduct with the substrate. The subtilases may be divided into 6 sub-divisions, i.e. the Subtilisin family, the Thermitase family, the Proteinase K family, the Lantibiotic peptidase family, the Kexin family and the Pyrolysin family.
Examples of subtilases are those derived from Bacillus such as Bacillus lentus, B. alkalophilus, B. subtilis, B. amyloliquefaciens, Bacillus pumilus and Bacillus gibsonii described in; U.S. Pat. No. 7,262,042 and WO09/021867, and Subtilisin lentus, Subtilisin Novo, Subtilisin Carlsberg, Bacillus licheniformis, Subtilisin BPN′, Subtilisin 309, Subtilisin 147 and Subtilisin 168 described in WO89/06279 and protease PD138 described in (WO93/18140). Other useful proteases may be those described in WO92/175177, WO01/016285, WO02/026024 and WO02/016547. Examples of trypsin-like proteases are trypsin (e.g. of porcine or bovine origin) and the Fusarium protease described in WO89/06270, WO94/25583 and WO05/040372, and the chymotrypsin proteases derived from Cellulomonas described in WO05/052161 and WO05/052146.
A further suitable protease is the alkaline protease from Bacillus lentus DSM 5483, as described for example in WO95/23221, and variants thereof which are described in WO92/21760, WO95/23221, EP1921147 and EP1921148.
Examples of metalloproteases are the neutral metalloprotease as described in WO07/044993 (Genencor Int.) such as those derived from Bacillus amyloliquefaciens.
Examples of useful proteases are the variants described in: WO92/19729, WO96/034946, WO98/20115, WO98/20116, WO99/011768, WO01/44452, WO03/006602, WO04/03186, WO04/041979, WO07/006305, WO11/036263, WO11/036264, especially the variants with substitutions in one or more of the following positions: 3, 4, 9, 15, 27, 36, 57, 68, 76, 87, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 106, 118, 120, 123, 128, 129, 130, 160, 167, 170, 194, 195, 199, 205, 206, 217, 218, 222, 224, 232, 235, 236, 245, 248, 252 and 274 using the BPN′ numbering. More preferred protease variants may comprise the mutations: S3T, V41, S9R, A15T, K27R, *36D, V68A, N76D, N87S, N87R, *97E, A98S, S99G, S99D, S99A, S99AD, S101G, S101M, S101R S103A, V1041, V104Y, V104N, S106A, G118V, G118R, H120D, H120N, N123S, S128L, P129Q, S130A, G160D, Y167A, R170S, A194P, G195E, V199M, V2051, L217D, N218D, M222S, A232V, K235L, Q236H, Q245R, N252K, T274A (using BPN′ numbering).
Suitable commercially available protease enzymes include those sold under the trade names Alcalase®, Duralase™, Durazym™, Relase®, Relase® Ultra, Savinase® (SEQ ID NO:6), Savinase® Ultra, Primase®, Polarzyme®, Kannase®, Liquanase®, Liquanase® Ultra, Ovozyme®, Coronase®, Coronase® Ultra, Neutrase® (SEQ ID NO: 12), Everlase® and Esperase® (Novozymes NS), those sold under the tradename Maxatase®, Maxacal®, Maxapem®, Purafect®, Purafect Prime®, Preferenz™, Purafect MAO, Purafect Ox®, Purafect OxP®, Puramax®, Properase®, Effectenz™, FN2®, FN3®, FN4®, Eraser®, Opticlean® and Optimase® (Danisco/DuPont), Axapem™ (Gist-Brocases N.V.), BLAP (sequence shown in FIG. 29 of U.S. Pat. No. 5,352,604) and variants hereof (Henkel AG) and KAP (Bacillus alkalophilus Subtilisin) from Kao. A further suitable protease is TY145 protease (SEQ ID NO: 14).
The protease and alpha-amylase may be added to a detergent composition in an amount corresponding to 0.001-100 mg of protein, such as 0.01-100 mg of protein, preferably 0.005-50 mg of protein, more preferably 0.01-25 mg of protein, even more preferably 0.05-10 mg of protein, most preferably 0.05-5 mg of protein, and even most preferably 0.01-1 mg of protein per litre of wash liquid.
Besides enzymes the detergent compositions according to the invention may comprise additional components. The choice of additional components is within the skill of the artisan and includes conventional ingredients, including the exemplary non-limiting components set forth below. The choice of components may include, for fabric care, the consideration of the type of fabric to be cleaned, the type and/or degree of soiling, the temperature at which cleaning is to take place, and the formulation of the detergent product. Although components mentioned below are categorized by general header according to a particular functionality, this is not to be construed as a limitation, as a component may comprise additional functionalities as will be appreciated by the skilled artisan.
Other components of the detergent composition according to the present invention may be surfactants. Surfactants lower the surface tension in the detergent, which allows a stain being cleaned to be lifted and dispersed and then washed away. Thus, the detergent composition according to the present invention may comprise one or more surfactants, which may be anionic and/or cationic and/or non-ionic and/or semi-polar and/or zwitterionic, or a mixture thereof. In a particular embodiment, the detergent composition includes a mixture of one or more nonionic surfactants and one or more anionic surfactants. Thus, the surfactant may be selected from the group consisting of anionic surfactants, cationic surfactants, nonionic surfactant, semi-polar surfactants, zwitterionic surfactants and amphoteric surfactants. The surfactant(s) is typically present at a level of from about 0.1% to 60% by weight, such as about 1% to about 40%, or about 3% to about 20%, or about 3% to about 10%. The surfactant(s) is chosen based on the desired cleaning application, and includes any conventional surfactant(s) known in the art. Any surfactant known in the art for use in detergents may be utilized.
When an anionic surfactant is included, the detergent composition will usually contain from about 1% to about 40% by weight, such as from about 5% to about 30%, including from about 5% to about 15%, or from about 20% to about 25% of the anionic surfactant. Non-limiting examples of anionic surfactants include sulfates and sulfonates, in particular, linear alkylbenzenesulfonates (LAS), isomers of LAS, branched alkylbenzenesulfonates (BABS), phenylalkanesulfonates, alpha-olefinsulfonates (AOS), olefin sulfonates, alkene sulfonates, alkane-2,3-diylbis(sulfates), hydroxyalkanesulfonates and disulfonates, alkyl sulfates (AS) such as sodium dodecyl sulfate (SDS), fatty alcohol sulfates (FAS), primary alcohol sulfates (PAS), alcohol ethersulfates (AES or AEOS or FES, also known as alcohol ethoxysulfates or fatty alcohol ether sulfates), secondary alkanesulfonates (SAS), paraffin sulfonates (PS), ester sulfonates, sulfonated fatty acid glycerol esters, alpha-sulfo fatty acid methyl esters (alpha-SFMe or SES) including methyl ester sulfonate (MES), alkyl- or alkenylsuccinic acid, dodecenyl/tetradecenyl succinic acid (DTSA), fatty acid derivatives of amino acids, diesters and monoesters of sulfo-succinic acid or soap, and combinations thereof.
When a cationic surfactant is included, the detergent composition will usually contain from about 1% to about 40% by weight of the cationic surfactant. Non-limiting examples of cationic surfactants include alkyldimethylehanolamine quat (ADMEAQ), cetyltrimethylammonium bromide (CTAB), dimethyldistearylammonium chloride (DSDMAC), and alkylbenzyldimethylammonium, and combinations thereof, Alkyl quaternary ammonium compounds, Alkoxylated quaternary ammonium (AQA),
When a non-ionic surfactant is included, the detergent composition will usually contain from about 0.2% to about 40% by weight of the non-ionic surfactant, for example from about 0.5% to about 30%, in particular from about 1% to about 20%, from about 3% to about 10%, such as from about 3% to about 5%, or from about 8% to about 12%. Non-limiting examples of non-ionic surfactants include alcohol ethoxylates (AE or AEO), alcohol propoxylates, propoxylated fatty alcohols (PFA), alkoxylated fatty acid alkyl esters, such as ethoxylated and/or propoxylated fatty acid alkyl esters, alkylphenol ethoxylates (APE), nonylphenol ethoxylates (NPE), alkylpolyglycosides (APG), alkoxylated amines, fatty acid monoethanolamides (FAM), fatty acid diethanolamides (FADA), ethoxylated fatty acid monoethanolamides (EFAM), propoxylated fatty acid monoethanolamide (PFAM), polyhydroxy alkyl fatty acid amides, or N-acyl N-alkyl derivatives of glucosamine (glucamides, GA, or fatty acid glucamide, FAGA), as well as products available under the trade names SPAN and TWEEN, and combinations thereof.
When a semipolar surfactant is included, the detergent composition will usually contain from about 1% to about 40% by weight of the semipolar surfactant. Non-limiting examples of semipolar surfactants include amine oxides (AO) such as alkyldimethylamineoxide, N-(coco alkyl)-N,N-dimethylamine oxide and N-(tallow-alkyl)-N,N-bis(2-hydroxyethyl)amine oxide, fatty acid alkanolamides and ethoxylated fatty acid alkanolamides, and combinations thereof.
When a zwitterionic surfactant is included, the detergent composition will usually contain from about 1% to about 40% by weight of the zwitterionic surfactant. Non-limiting examples of zwitterionic surfactants include betaine, alkyldimethylbetaine, and sulfobetaine, and combinations thereof.
The protease and alpha-amylase polypeptides may be stabilized using stabilizing agents, which may be selected from the group containing propylene glycol, glycerol, a sugar, a sugar alcohol, lactic acid, boric acid, borate and phenyl boronic acid derivates, such as those where the residue R in the phenyl boronic acid derivative is a C1-C6 alkyl group and among these, more preferably, CH3, CH3CH2 or CH3CH2CH2. The residue R in the phenyl boronic acid derivative may also be hydrogen. One example of a phenyl boronic acid derivative is 4-formylphenylboronic acid (4-FPBA) with the following formula:
Phenyl boronic acid derivatives may furthermore have other chemical modifications on the phenyl ring, and in particular they can contain one or more methyl, amino, nitro, chloro, fluoro, bromo, hydroxyl, formyl, ethyl, acetyl, t-butyl, anisyl, benzyl, trifluoroacetyl, N-hydroxysuccinimide, t-butyloxycarbonyl, benzoyl, 4-methylbenzyl, thioanizyl, thiocresyl, benzyloxymethyl, 4-nitrophenyl, benzyloxycarbonyl, 2-nitrobenzoyl, 2-nitrophenylsulfenyl, 4-toluenesulfonyl, pentafluorophenyl, diphenylmethyl, 2-chlorobenzyloxycarbonyl, 2,4,5-trichlorophenyl, 2-bromobenzyloxycarbonyl, 9-fluorenylmethyloxycarbonyl, triphenylmethyl, 2,2,5,7,8-pentamethylchroman-6-sulfonyl residues or groups or combinations thereof. All stabilizing agents may be present in the detergent composition of the present invention in all protonated or deprotonated forms. Furthermore, all such compounds, in particular their deprotonated forms, can be associated with cations. Preferred cations in this respect are monovalent or polyvalent, in particular divalent, cations, in particular Na ions (Na+), K ions (K+), Li ions (Li+), Ca ions (Ca2+), Mg ions (Mg2+), Mn ions (Mn2+) and Zn ions (Zn2+). The detergent compositions of the present invention may comprise two or more stabilizing agents e.g. such as those selected from the group consisting of propylene glycol, glycerol, 4-formylphenyl boronic acid and borate. One example is a detergent composition of the present invention comprising 4-formylphenyl boronic acid and/or borate. The phenyl boronic acid derivative may be contained in the detergent composition in a quantity of from 0.00001 to 5.0 wt %, preferably from 0.0001 to 3.0 wt %, from 0.001 to 2.0 wt %, from 0.005 to 1.0 wt %, from 0.01 to 0.5 wt %, from 0.02 to 0.3 wt % Preferably, the boric acid/borate is contained in a quantity of from 0.001 to 5.5 wt. % and increasingly preferably of from 0.01 to 4.5 wt. %, from 0.05 to 3.5 and from 0.1 to 3, 0.4 to 2.49, 0.5 to 1.5 wt. % in the detergent composition. Addition of a combination of borate and 4-formylphenyl boronic acid has been found to be particularly effective, leading to a high increase in enzyme stability in detergent compositions. Preferably, the boric acid/borate is contained in a quantity of from 0.001 to 5.5 wt. % and increasingly preferably from 0.075 to 4.5 wt. %, from 0.09 to 3.5 and from 0.1 to 2.49 wt. %, and the phenyl boronic acid derivative is contained in a quantity of from 0.001 to 0.08 wt. % and increasingly preferably from 0.003 to 0.06 wt. %, from 0.005 to 0.05 wt. %, from 0.007 to 0.03 wt. % and from 0.009 to 0.01 wt. % in a detergent composition. Particularly preferred is the addition of 4-formylphenyl boronic acid in an amount of 1.0 to 2.0 wt % in combination with 1.0 wt % borate.
The detergent composition according to the invention may comprise protease and alpha-amylase polypeptides which may also be stabilized using peptide aldehydes or ketones such as described in WO 2005/105826 and WO 2009/118375. Another example of detergent compositions according to the invention relates to a detergent composition comprising a protease and alpha-amylase as described herein, wherein the detergent formulation is as disclosed in WO 97/07202, which is hereby incorporated by reference.
Another optional component of the detergent composition according to the present invention is hydrotropes.
A hydrotrope is a compound that solubilises hydrophobic compounds in aqueous solutions (or oppositely, polar substances in a non-polar environment). Typically, hydrotropes have both hydrophilic and a hydrophobic character (so-called amphiphilic properties as known from surfactants); however the molecular structure of hydrotropes generally do not favor spontaneous self-aggregation, see e.g. review by Hodgdon and Kaler (2007), Current Opinion in Colloid & Interface Science 12: 121-128. Hydrotropes do not display a critical concentration above which self-aggregation occurs as found for surfactants and lipids forming miceller, lamellar or other well defined meso-phases. Instead, many hydrotropes show a continuous-type aggregation process where the sizes of aggregates grow as concentration increases. However, many hydrotropes alter the phase behavior, stability, and colloidal properties of systems containing substances of polar and non-polar character, including mixtures of water, oil, surfactants, and polymers. Hydrotropes are classically used across industries from pharma, personal care, food, to technical applications. Use of hydrotropes in detergent compositions allow for example more concentrated formulations of surfactants (as in the process of compacting liquid detergents by removing water) without inducing undesired phenomena such as phase separation or high viscosity.
Thus, the detergent composition according to the present invention may comprise 0-5% by weight, such as about 0.5 to about 5%, or about 3% to about 5%, of a hydrotrope. Any hydrotrope known in the art for use in detergents may be utilized. Non-limiting examples of hydrotropes include sodium benzene sulfonate, sodium p-toluene sulfonates (STS), sodium xylene sulfonates (SXS), sodium cumene sulfonates (SCS), sodium cymene sulfonate, amine oxides, alcohols and polyglycolethers, sodium hydroxynaphthoate, sodium hydroxynaphthalene sulfonate, sodium ethylhexyl sulfate, and combinations thereof.
Another optional component of a detergent composition may be builders and/or co-builders. The term “builder” may be classified by the test described by M. K. Nagaraja et al., JAOCS, Vol. 61, no. 9 (September 1984), pp. 1475-1478 to determine the minimum builder level required to lower the water hardness at pH 8 from 2.0 mM (as CaCO3) to 0.10 mM in a solution. The builder may particularly be a chelating agent that forms water-soluble complexes with e.g. calcium and magnesium ions. The term “chelating agents” or “chelators” as used herein, refers to chemicals that form molecules with certain metal ions, inactivating the ions so that they cannot react with other elements thus a binding agent that suppresses chemical activity by forming chelates. Chelation is the formation or presence of two or more separate bindings between a ligand and a single central atom. The ligand may be any organic compound, a silicate or a phosphate. Thus, in one embodiment, the detergent composition according to the present invention may comprise about 0-65% by weight, such as about 5% to about 50% of a detergent builder or co-builder, or a mixture thereof. In a dish wash detergent, the level of builder is typically 40-65%, particularly 50-65%. The builder and/or co-builder may particularly be a chelating agent that forms water-soluble complexes with Ca and Mg. Any builder and/or co-builder known in the art for use in laundry, ADW and hard surfaces cleaning detergents may be utilized. Non-limiting examples of builders include zeolites, diphosphates (pyrophosphates), triphosphates such as sodium triphosphate (STP or STPP), carbonates such as sodium carbonate, soluble silicates such as sodium metasilicate, layered silicates (e.g., SKS-6 from Hoechst), ethanolamines such as 2-aminoethan-1-ol (MEA), iminodiethanol (DEA) and 2,2′,2″-nitrilotriethanol (TEA), and carboxymethylinulin (CMI), and combinations thereof.
The detergent composition according to the present invention may also comprise 0-65% by weight, such as about 5% to about 40%, of a detergent co-builder, or a mixture thereof. The detergent composition may include a co-builder alone, or in combination with a builder, for example a zeolite builder. Non-limiting examples of co-builders include homopolymers of polyacrylates or copolymers thereof, such as poly(acrylic acid) (PAA) or copoly(acrylic acid/maleic acid) (PAA/PMA). Further non-limiting examples include citrate, chelators such as aminocarboxylates, aminopolycarboxylates and phosphonates, and alkyl- or alkenylsuccinic acid. Additional specific examples include 2,2′,2″-nitrilotriacetic acid (NTA), etheylenediaminetetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), iminodisuccinic acid (IDS), ethylenediamine-N,N′-disuccinic acid (EDDS), methylglycinediacetic acid (MGDA), glutamic acid-N,N-diacetic acid (GLDA), 1-hydroxyethane-1,1-diylbis(phosphonic acid) (HEDP), ethylenediamine-tetrakis(methylene)tetrakis(phosphonic acid) (EDTMPA), diethylenetriamine-pentakis(methylene)pentakis(phosphonic acid) (DTPMPA), N-(2-hydroxyethyl)iminodiacetic acid (EDG), aspartic acid-N-monoacetic acid (ASMA), aspartic acid-N,N-diacetic acid (ASDA), aspartic acid-N-monopropionic acid (ASMP), iminodisuccinic acid (IDA), N-(2-sulfomethyl) aspartic acid (SMAS), N-(2-sulfoethyl) aspartic acid (SEAS), N-(2-sulfomethyl) glutamic acid (SMGL), N-(2-sulfoethyl) glutamic acid (SEGL), N-methyliminodiacetic acid (MIDA), α-alanine-N,N-diacetic acid (α-ALDA), serine-N,N-diacetic acid (SEDA), isoserine-N,N-diacetic acid (ISDA), phenylalanine-N,N-diacetic acid (PHDA), anthranilic acid-N,N-diacetic acid (ANDA), sulfanilic acid-N, N-diacetic acid (SLDA), taurine-N, N-diacetic acid (TUDA) and sulfomethyl-N,N-diacetic acid (SMDA), N-(hydroxyethyl)-ethylidenediaminetriacetate (HEDTA), diethanolglycine (DEG), Diethylenetriamine Penta (Methylene Phosphonic acid) (DTPMP), aminotris(methylenephosphonic acid) (ATMP), and combinations and salts thereof. Further exemplary builders and/or co-builders are described in, e.g., WO 09/102854, U.S. Pat. No. 5,977,053.
Yet another optional component of the detergent composition may be bleaching systems. Bleach systems remove discolor often by oxidation and many bleaches also have strong bactericidal properties, and are used for disinfecting and sterilizing. Thus, in one embodiment, the detergent composition according to the present invention may comprise 0-10% by weight, such as about 1% to about 5%, of a bleaching system. Any bleaching system known in the art for use in laundry, ADW and hard surfaces cleaning detergents may be utilized. Suitable bleaching system components include bleaching catalysts, photobleachers, bleach activators, sources of hydrogen peroxide such as sodium percarbonate and sodium perborates, preformed peracids and mixtures thereof. Suitable preformed peracids include, but are not limited to, peroxycarboxylic acids and salts, percarbonic acids and salts, perimidic acids and salts, peroxymonosulfuric acids and salts, for example, Oxone (R), and mixtures thereof. Non-limiting examples of bleaching systems include peroxide-based bleaching systems, which may comprise, for example, an inorganic salt, including alkali metal salts such as sodium salts of perborate (usually mono- or tetra-hydrate), percarbonate, persulfate, perphosphate, persilicate salts, in combination with a peracid-forming bleach activator. By bleach activator is meant herein a compound which reacts with peroxygen bleach like hydrogen peroxide to form a peracid. The peracid thus formed constitutes the activated bleach. Suitable bleach activators to be used herein include those belonging to the class of esters amides, imides or anhydrides. Suitable examples are tetracetyl ethylene diamine (TAED), sodium 3,5,5 trimethyl hexanoyloxybenzene sulphonat, diperoxy dodecanoic acid, 4-(dodecanoyloxy)-benzenesulfonate (LOBS), 4-(decanoyloxy)benzenesulfonate, 4-(decanoyloxy)benzoate (DOBS), 4-(3,5,5-trimethylhexanoyloxy)benzenesulfonate (ISONOBS), tetraacetylethylene-diamine (TAED) and 4-(nonanoyloxy)benzenesulfonate (NOBS), and/or those disclosed in WO98/17767. A particular family of bleach activators of interest was disclosed in EP624154 and particulary preferred in that family is acetyl triethyl citrate (ATC). ATC or a short chain triglyceride like Triacin has the advantage that it is environmental friendly as it eventually degrades into citric acid and alcohol. Furthermore acethyl triethyl citrate and triacetin has a good hydrolytical stability in the product upon storage and it is an efficient bleach activator. Finally ATC provides a good building capacity to the laundry additive. Alternatively, the bleaching system may comprise peroxyacids of, for example, the amide, imide, or sulfone type. The bleaching system may also comprise peracids such as 6-(phthaloylamino)percapronic acid (PAP). The bleaching system may also include a bleach catalyst. In some embodiments the bleach component may be an organic catalyst selected from the group consisting of organic catalysts having the following formulae:
and mixtures thereof; wherein each R1 is independently a branched alkyl group containing from 9 to 24 carbons or linear alkyl group containing from 11 to 24 carbons, preferably each R1 is independently a branched alkyl group containing from 9 to 18 carbons or linear alkyl group containing from 11 to 18 carbons, more preferably each R1 is independently selected from the group consisting of 2-propylheptyl, 2-butyloctyl, 2-pentylnonyl, 2-hexyldecyl, n-dodecyl, n-tetradecyl, n-hexadecyl, n-octadecyl, iso-nonyl, iso-decyl, iso-tridecyl and iso-pentadecyl. Other exemplary bleaching systems are described, e.g., in WO2007/087258, WO2007/087244, WO2007/087259, WO2007/087242. Suitable photobleaches may for example be sulfonated zinc phthalocyanine.
Another component of a detergent composition is polymers. Thus, in one embodiment, the detergent composition according to the invention comprises a polymer.
Accordingly, the detergent composition according to the present invention may comprise 0-10% by weight, such as 0.5-5%, 2-5%, 0.5-2% or 0.2-1% of a polymer. Any polymer known in the art for use in detergents may be utilized. The polymer may function as a co-builder as mentioned above, or may provide antiredeposition, fiber protection, soil release, dye transfer inhibition, grease cleaning and/or anti-foaming properties. Some polymers may have more than one of the above-mentioned properties and/or more than one of the below-mentioned motifs. Exemplary polymers include (carboxymethyl)cellulose (CMC), poly(vinyl alcohol) (PVA), poly(vinylpyrrolidone) (PVP), poly(ethyleneglycol) or poly(ethylene oxide) (PEG), ethoxylated poly(ethyleneimine), carboxymethyl inulin (CMI), and polycarboxylates such as PAA, PAA/PMA, poly-aspartic acid, and lauryl methacrylate/acrylic acid copolymers, hydrophobically modified CMC (HM-CMC) and silicones, copolymers of terephthalic acid and oligomeric glycols, copolymers of polyethylene terephthalate and polyoxyethene terephthalate (PET-POET), PVP, poly(vinylimidazole) (PVI), poly(vinylpyridin-N-oxide) (PVPO or PVPNO) and polyvinylpyrrolidone-vinylimidazole (PVPVI). Further exemplary polymers include sulfonated polycarboxylates, polyethylene oxide and polypropylene oxide (PEO-PPO) and diquaternium ethoxy sulfate. Other exemplary polymers are disclosed in, e.g., WO 2006/130575. Salts of the above-mentioned polymers are also contemplated.
Yet another component of detergent compositions may be fabric hueing agents. Thus, in one embodiment, the detergent composition according to the invention comprises a fabric hueing agent.
The detergent composition according to the present invention may also comprise fabric hueing agents such as dyes or pigments which when formulated in detergent compositions can deposit onto a fabric when said fabric is contacted with a wash liquor comprising said detergent compositions thus altering the tint of said fabric through absorption/reflection of visible light. Fluorescent whitening agents emit at least some visible light. In contrast, fabric hueing agents alter the tint of a surface as they absorb at least a portion of the visible light spectrum. Suitable fabric hueing agents include dyes and dye-clay conjugates, and may also include pigments. Suitable dyes include small molecule dyes and polymeric dyes. Suitable small molecule dyes include small molecule dyes selected from the group consisting of dyes falling into the Colour Index (C.I.) classifications of Direct Blue, Direct Red, Direct Violet, Acid Blue, Acid Red, Acid Violet, Basic Blue, Basic Violet and Basic Red, or mixtures thereof, for example as described in WO2005/03274, WO2005/03275, WO2005/03276 and EP1876226 (hereby incorporated by reference). A detergent composition preferably comprises from about 0.00003 wt % to about 0.2 wt %, from about 0.00008 wt % to about 0.05 wt %, or even from about 0.0001 wt % to about 0.04 wt % fabric hueing agent. The composition may comprise from 0.0001 wt % to 0.2 wt % fabric hueing agent, this may be especially preferred when the composition is in the form of a unit dose pouch. Suitable hueing agents are also disclosed in, e.g., WO 2007/087257, WO2007/087243.
Other optional components of detergent compositions comprise buffering agents, structurants, sequestrants, optical brighteners, antifoaming agents, fragrances, anti-redeposition agents, skin conditioning agents, softness extenders, emulsifiers, colorants, fabric conditioners, foam boosters, suds suppressors, dyes, perfume, tarnish inhibitors, bactericides, fungicides, soil suspending agents, anti-corrosion agents, enzyme inhibitors or stabilizers, enzyme activators, transferase(s), hydrolytic enzymes, oxido reductases, bluing agents and fluorescent dyes, oxidising agents, antioxidants, bulking agents, and/or solubilizers.
The detergent compositions may further comprise at least one or more of the following: a surfactant, a builder, a chelator or chelating agent, bleach system or bleach component, for use in laundry or dish wash.
The amount of a surfactant, a builder, a chelator or chelating agent, bleach system and/or bleach component may be reduced compared to amount of surfactant, builder, chelator or chelating agent, bleach system and/or bleach component used without the alpha-amylase and protease of the invention. Preferably the at least one component which is a surfactant, a builder, a chelator or chelating agent, bleach system and/or bleach component is present in an amount that is 1% less, such as 2% less, such as 3% less, such as 4% less, such as 5% less, such as 6% less, such as 7% less, such as 8% less, such as 9% less, such as 10% less, such as 15% less, such as 20% less, such as 25% less, such as 30% less, such as 35% less, such as 40% less, such as 45% less, such as 50% less than the amount of the component in the system without the addition of alpha-amylase and protease of the invention, such as a conventional amount of such component. Detergent compositions may also be a composition which is free of at least one component which is a surfactant, a builder, a chelator or chelating agent, bleach system or bleach component and/or polymer.
In one embodiment, the detergent composition according to the invention comprises one or more further enzymes, such as at least two enzymes, more preferred at least three, four or five enzymes. Preferably, the enzymes of the detergent composition have different substrate specificity, e.g., proteolytic activity, amylolytic activity, lipolytic activity, cellulytic activity, hemicellulytic activity, oxidative activity, RNAse activity, DNAse activity or pectolytic activity.
The detergent composition according to the invention may comprise one or more additional enzymes selected from proteases, amylases, lipases, cutinases, cellulases, endoglucanases, lechinase, xyloglucanases, pectinases, pectin lyases, xanthanases, peroxidases, haloperoxygenases, catalases, mannanases, or any mixture thereof. Other suitable enzymes include carbohydrate-active enzymes like carbohydrase, arabinase, galactanase, xylanase; or oxidases, e.g., a laccase, and/or peroxidase.
In general the properties of the selected enzyme(s) should be compatible with the selected detergent, (i.e., pH-optimum, compatibility with other enzymatic and non-enzymatic ingredients, etc.), and the enzyme(s) should be present in effective amounts.
Suitable proteases are as described above.
Suitable cellulases include those of bacterial or fungal origin. Chemically modified or protein engineered mutants are included. Suitable cellulases include cellulases from the genera Bacillus, Pseudomonas, Humicola, Fusarium, Thielavia, Acremonium, e.g., the fungal cellulases produced from Humicola insolens, Myceliophthora thermophila and Fusarium oxysporum disclosed in U.S. Pat. Nos. 4,435,307, 5,648,263, 5,691,178, 5,776,757 and WO 89/09259.
Especially suitable cellulases are the alkaline or neutral cellulases having colour care benefits. Examples of such cellulases are cellulases described in EP 0 495 257, EP 0 531 372, WO 96/11262, WO 96/29397, WO 98/08940. Other examples are cellulase variants such as those described in WO 94/07998, EP 0 531 315, U.S. Pat. Nos. 5,457,046, 5,686,593, 5,763,254, WO 95/24471, WO 98/12307 and WO99/001544.
Other cellulases are endo-beta-1,4-glucanase enzyme having a sequence of at least 97% identity to the amino acid sequence of position 1 to position 773 of SEQ ID NO:2 of WO 2002/099091 or a family 44 xyloglucanase, which a xyloglucanase enzyme having a sequence of at least 60% identity to positions 40-559 of SEQ ID NO: 2 of WO 2001/062903.
Commercially available cellulases include Celluzyme™, and Carezyme™ (Novozymes NS) Carezyme Premium™ (Novozymes NS), Celluclean™ (Novozymes NS), Celluclean Classic™ (Novozymes NS), Cellusoft™ (Novozymes NS), Whitezyme™ (Novozymes NS), Clazinase™, and Puradax HA™ (Genencor International Inc.), and KAC-500(B)™ (Kao Corporation).
Suitable mannanases include those of bacterial or fungal origin. Chemically or genetically modified mutants are included. The mannanase may be an alkaline mannanase of Family 5 or 26. It may be a wild-type from Bacillus or Humicola, particularly B. agaradhaerens, B. licheniformis, B. halodurans, B. clausii, or H. insolens. Suitable mannanases are described in WO 1999/064619. A commercially available mannanase is Mannaway (Novozymes NS).
Suitable lipases and cutinases include those of bacterial or fungal origin. Chemically modified or protein engineered mutant enzymes are included. Examples include lipase from Thermomyces, e.g. from T. lanuginosus (previously named Humicola lanuginosa) as described in EP258068 and EP305216, cutinase from Humicola, e.g. H. insolens (WO96/13580), lipase from strains of Pseudomonas (some of these now renamed to Burkholderia), e.g. P. alcaligenes or P. pseudoalcaligenes (EP218272), P. cepacia (EP331376), P. sp. strain SD705 (WO95/06720 & WO96/27002), P. wisconsinensis (WO 96/12012), GDSL-type Streptomyces lipases (WO10/065455), cutinase from Magnaporthe grisea (WO10/107560), cutinase from Pseudomonas mendocina (U.S. Pat. No. 5,389,536), lipase from Thermobifida fusca (WO11/084412), Geobacillus stearothermophilus lipase (WO11/084417), lipase from Bacillus subtilis (WO11/084599), and lipase from Streptomyces griseus (WO11/150157) and S. pristinaespiralis (WO12/137147).
Other examples are lipase variants such as those described in EP407225, WO92/05249, WO94/01541, WO94/25578, WO95/14783, WO95/30744, WO95/35381, WO95/22615, WO96/00292, WO97/04079, WO97/07202, WO00/34450, WO00/60063, WO01/92502, WO07/87508 and WO09/109500.
Preferred commercial lipase products include Lipolase™, Lipex™; Lipolex™ and Lipoclean™ (Novozymes NS), Lumafast (originally from Genencor) and Lipomax (originally from Gist-Brocades).
Still other examples are lipases sometimes referred to as acyltransferases or perhydrolases, e.g. acyltransferases with homology to Candida antarctica lipase A (WO10/111143), acyltransferase from Mycobacterium smegmatis (WO05/56782), perhydrolases from the CE 7 family (WO09/67279), and variants of the M. smegmatis perhydrolase in particular the S54V variant used in the commercial product Gentle Power Bleach from Huntsman Textile Effects Pte Ltd (WO10/100028).
Suitable additional amylases which can be used together with the enzymes of the invention may be an alpha-amylase or a glucoamylase and may be of bacterial or fungal origin. Chemically modified or protein engineered mutants are included. Amylases include, for example, alpha-amylases obtained from Bacillus, e.g., a special strain of Bacillus licheniformis, described in more detail in GB 1,296,839.
Suitably amylases include the Bacillus alpha-amylases, such as Termamyl (SEQ ID NO:10), AA560 (SEQ ID NO: 8), SP707 (SEQ ID NO: 9), and SP.7-7 (SEQ ID NO: 15). Suitable amylases include amylases having SEQ ID NO: 2 in WO 95/10603 or variants having 90% sequence identity to SEQ ID NO: 3 thereof. Preferred variants are described in WO 94/02597, WO 94/18314, WO 97/43424 and SEQ ID NO: 4 of WO 99/019467, such as variants with substitutions in one or more of the following positions: 15, 23, 105, 106, 124, 128, 133, 154, 156, 178, 179, 181, 188, 190, 197, 201, 202, 207, 208, 209, 211, 243, 264, 304, 305, 391, 408, and 444.
Different suitable amylases include amylases having SEQ ID NO: 6 in WO 02/010355 or variants thereof having 90% sequence identity to SEQ ID NO: 6. Preferred variants of SEQ ID NO: 6 are those having a deletion in positions 181 and 182 and a substitution in position 193.
Other amylases which are suitable are hybrid alpha-amylase comprising residues 1-33 of the alpha-amylase derived from B. amyloliquefaciens shown in SEQ ID NO: 6 of WO 2006/066594 and residues 36-483 of the B. licheniformis alpha-amylase shown in SEQ ID NO: 4 of WO 2006/066594 or variants having 90% sequence identity thereof. Preferred variants of this hybrid alpha-amylase are those having a substitution, a deletion or an insertion in one of more of the following positions: G48, T49, G107, H156, A181, N190, M197, 1201, A209 and Q264. Most preferred variants of the hybrid alpha-amylase comprising residues 1-33 of the alpha-amylase derived from B. amyloliquefaciens shown in SEQ ID NO: 6 of WO 2006/066594 and residues 36-483 of SEQ ID NO: 4 are those having the substitutions:
M197T; H156Y+A181T+N190F+A209V+Q264S; or G48A+T49I+G107A+H156Y+A181T+N190F+1201F+A209V+Q264S.
Further amylases which are suitable are amylases having SEQ ID NO: 6 in WO 99/019467 or variants thereof having 90% sequence identity to SEQ ID NO: 6. Preferred variants of SEQ ID NO: 6 are those having a substitution, a deletion or an insertion in one or more of the following positions: R181, G182, H183, G184, N195, 1206, E212, E216 and K269. Particularly preferred amylases are those having deletion in positions R181 and G182, or positions H183 and G184.
Additional amylases which can be used are those having SEQ ID NO: 1, SEQ ID NO: 3, SEQ ID NO: 2 or SEQ ID NO: 7 of WO 96/023873 or variants thereof having 90% sequence identity to SEQ ID NO: 1, SEQ ID NO: 2, SEQ ID NO: 3 or SEQ ID NO: 7. Preferred variants of SEQ ID NO: 1, SEQ ID NO: 2, SEQ ID NO: 3 or SEQ ID NO: 7 are those having a substitution, a deletion or an insertion in one or more of the following positions: 140, 181, 182, 183, 184, 195, 206, 212, 243, 260, 269, 304 and 476, using SEQ ID 2 of WO 96/023873 for numbering. More preferred variants are those having a deletion in two positions selected from 181, 182, 183 and 184, such as 181 and 182, 182 and 183, or positions 183 and 184. Most preferred amylase variants of SEQ ID NO: 1, SEQ ID NO: 2 or SEQ ID NO: 7 are those having a deletion in positions 183 and 184 and a substitution in one or more of positions 140, 195, 206, 243, 260, 304 and 476.
Other amylases which can be used are amylases having SEQ ID NO: 2 of WO 08/153815, SEQ ID NO: 10 in WO 01/66712 or variants thereof having 90% sequence identity to SEQ ID NO: 2 of WO 08/153815 or 90% sequence identity to SEQ ID NO: 10 in WO 01/66712. Preferred variants of SEQ ID NO: 10 in WO 01/66712 are those having a substitution, a deletion or an insertion in one of more of the following positions: 176, 177, 178, 179, 190, 201, 207, 211 and 264.
Further suitable amylases are amylases having SEQ ID NO: 2 of WO 09/061380 or variants having 90% sequence identity to SEQ ID NO: 2 thereof. Preferred variants of SEQ ID NO: 2 are those having a truncation of the C-terminus and/or a substitution, a deletion or an insertion in one of more of the following positions: Q87, Q98, S125, N128, T131, T165, K178, R180, S181, T182, G183, M201, F202, N225, S243, N272, N282, Y305, R309, D319, Q320, Q359, K444 and G475. More preferred variants of SEQ ID NO: 2 are those having the substitution in one of more of the following positions: Q87E, Q87R, Q98R, S125A, N128C, T1311, T1651, K178L, T182G, M201L, F202Y, N225E, N225R, N272E, N272R, S243Q, S243A, S243E, S243D, Y305R, R309A, Q320R, Q359E, K444E and G475K and/or deletion in position R180 and/or S181 or of T182 and/or G183. Most preferred amylase variants of SEQ ID NO: 2 are those having the substitutions:
N128C+K178L+T182G+Y305R+G475K;
N128C+K178L+T182G+F202Y+Y305R+D319T+G475K;
S125A+N128C+K178L+T182G+Y305R+G475K; or
S125A+N128C+T1311+T1651+K178L+T182G+Y305R+G475K wherein the variants are C-terminally truncated and optionally further comprises a substitution at position 243 and/or a deletion at position 180 and/or position 181.
Further suitable amylases are amylases having SEQ ID NO: 1 of WO13184577 or variants having 90% sequence identity to SEQ ID NO: 1 thereof. Preferred variants of SEQ ID NO: 1 are those having a substitution, a deletion or an insertion in one of more of the following positions: K176, R178, G179, T180, G181, E187, N192, M199, 1203, S241, R458, T459, D460, G476 and G477. More preferred variants of SEQ ID NO: 1 are those having the substitution in one of more of the following positions: K176L, E187P, N192F, N192Y, N192H, M199L, I203YF, S241Q, S241A, 5241 D, S241 N, R458N, T459S, D460T, G476K and G477K and/or deletion in position R178 and/or S179 or of T180 and/or G181. Most preferred amylase variants of SEQ ID NO: 1 are those having the substitutions:
E187P+I203Y+G476K
E187P+I203Y+R458N+T459S+D460T+G476K
wherein the variants optionally further comprise a substitution at position 241 and/or a deletion at position 178 and/or position 179.
Further suitable amylases are amylases having SEQ ID NO: 1 of WO10104675 or variants having 90% sequence identity to SEQ ID NO: 1 thereof. Preferred variants of SEQ ID NO: 1 are those having a substitution, a deletion or an insertion in one of more of the following positions: N21, D97, V128 K177, R179, S180, I181, G182, M200, L204, E242, G477 and G478. More preferred variants of SEQ ID NO: 1 are those having the substitution in one of more of the following positions: N21D, D97N, V128I K177L, M200L, L204Y, L204F, E242Q, E242A, G477K and G478K and/or deletion in position R179 and/or S180 or of 1181 and/or G182. Most preferred amylase variants of SEQ ID NO: 1 are those having the substitutions:
N21 D+D97N+V128I
wherein the variants optionally further comprise a substitution at position 200 and/or a deletion at position 180 and/or position 181.
Other suitable amylases are the alpha-amylase having SEQ ID NO: 12 in WO01/66712 or a variant having at least 90% sequence identity to SEQ ID NO: 12. Preferred amylase variants are those having a substitution, a deletion or an insertion in one of more of the following positions of SEQ ID NO: 12 in WO01/66712: R28, R118, N174; R181, G182, D183, G184, G186, W189, N195, M202, Y298, N299, K302, S303, N306, R310, N314; R320, H324, E345, Y396, R400, W439, R444, N445, K446, Q449, R458, N471, N484. Particular preferred amylases include variants having a deletion of D183 and G184 and having the substitutions R118K, N195F, R320K and R458K, and a variant additionally having substitutions in one or more position selected from the group: M9, G149, G182, G186, M202, T257, Y295, N299, M323, E345 and A339, most preferred a variant that additionally has substitutions in all these positions.
Other examples are amylase variants such as those described in WO2011/098531, WO2013/001078 and WO2013/001087.
Commercially available amylases are Duramyl™, Termamyl™, Fungamyl™, Stainzyme™, Stainzyme Plus™, Natalase™, Liquozyme X and BAN™ (from Novozymes NS; SEQ ID NO: 11), and Rapidase™, Purastar™/Effectenz™, Powerase, Preferenz S1000, Preferenz S100, Excellenz S2000 and Preferenz S110 (from Genencor International Inc./DuPont).
Suitable peroxidases/oxidases include those of plant, bacterial or fungal origin. Chemically modified or protein engineered mutants are included. Examples of useful peroxidases include peroxidases from Coprinus, e.g., from C. cinereus, and variants thereof as those described in WO 93/24618, WO 95/10602, and WO 98/15257.
Commercially available peroxidases include Guardzyme™ (Novozymes NS).
A detergent composition according to the invention may also comprise additional enzymes such as pectate lyases e.g. Pectawash™, chlorophyllases etc.
A detergent composition according to the invention may also comprise additional enzymes such as lechinases/beta-glucanases. Suitable Lechinases include those of bacterial or fungal origin. They may be chemically modified or protein engineered. Examples of useful beta-glucanases include those described in WO 2015/144824 (Novozymes NS) and WO 99/06516 (Henkel KGAA).
The detergent enzyme(s) may be included in the detergent composition according to the invention by adding separate additives containing one or more enzymes, or by adding a combined additive comprising all of these enzymes. A detergent additive, i.e., a separate additive or a combined additive, may be formulated, for example, as a granulate, liquid, slurry, etc. Preferred detergent additive formulations are granulates, in particular non-dusting granulates, liquids, in particular stabilized liquids, or slurries.
Non-dusting granulates may be produced, e.g., as disclosed in U.S. Pat. Nos. 4,106,991 and 4,661,452 and may optionally be coated by methods known in the art. Examples of waxy coating materials are poly(ethylene oxide) products (polyethyleneglycol, PEG) with mean molar weights of 1000 to 20000; ethoxylated nonylphenols having from 16 to 50 ethylene oxide units; ethoxylated fatty alcohols in which the alcohol contains from 12 to 20 carbon atoms and in which there are 15 to 80 ethylene oxide units; fatty alcohols; fatty acids; and mono- and di- and triglycerides of fatty acids. Examples of film-forming coating materials suitable for application by fluid bed techniques are given in GB 1483591. Liquid enzyme preparations may, for instance, be stabilized by adding a polyol such as propylene glycol, a sugar or sugar alcohol, lactic acid or boric acid according to established methods. Protected enzymes may be prepared according to the method disclosed in EP 238,216.
Variant polypeptides for use in the invention can be prepared using any mutagenesis procedure known in the art, such as site-directed mutagenesis, synthetic gene construction, semi-synthetic gene construction, random mutagenesis, shuffling, etc.
A nucleic acid construct comprising a polynucleotide encoding a polypeptide operably linked to one or more control sequences may be used to direct the expression of the coding sequence in a suitable host cell under conditions compatible with the control sequences.
The polynucleotide may be manipulated in a variety of ways to provide for expression of a polypeptide. Manipulation of the polynucleotide prior to its insertion into a vector may be desirable or necessary depending on the expression vector. The techniques for modifying polynucleotides utilizing recombinant DNA methods are well known in the art. A suitable recombinant expression vector comprises a polynucleotide encoding a polypeptide, a promoter, and transcriptional and translational stop signals. The various nucleotide and control sequences may be joined together to produce a recombinant expression vector that may include one or more convenient restriction sites to allow for insertion or substitution of the polynucleotide encoding the variant at such sites. Alternatively, the polynucleotide may be expressed by inserting the polynucleotide or a nucleic acid construct comprising the polynucleotide into an appropriate vector for expression. In creating the expression vector, the coding sequence is located in the vector so that the coding sequence is operably linked with the appropriate control sequences for expression.
The recombinant expression vector may be any vector (e.g., a plasmid or virus) that can be conveniently subjected to recombinant DNA procedures and can bring about expression of the polynucleotide. The choice of the vector will typically depend on the compatibility of the vector with the host cell into which the vector is to be introduced.
A suitable recombinant host cell comprises a polynucleotide encoding a polypeptide operably linked to one or more control sequences that direct the production of a polypeptide. A construct or vector comprising a polynucleotide is introduced into a host cell so that the construct or vector is maintained as a chromosomal integrant or as a self-replicating extra-chromosomal vector. The choice of a host cell will to a large extent depend upon the gene encoding the variant and its source. The host cell may be any cell useful in the recombinant production of a variant, e.g., a prokaryote or a eukaryote. The prokaryotic host cell may be any Gram-positive or Gram-negative bacterium. A bacterial host cell may be any Bacillus cell including, but not limited to, Bacillus alkalophilus, Bacillus amyloliquefaciens, Bacillus brevis, Bacillus circulans, Bacillus clausii, Bacillus coagulans, Bacillus firmus, Bacillus lautus, Bacillus lentus, Bacillus licheniformis, Bacillus megaterium, Bacillus pumilus, Bacillus stearothermophilus, Bacillus subtilis, and Bacillus thuringiensis cells. The introduction of DNA into a Bacillus cell may be effected by protoplast transformation (see, e.g., Chang and Cohen, 1979, Mol. Gen. Genet. 168: 111-115), competent cell transformation (see, e.g., Young and Spizizen, 1961, J. Bacteriol. 81: 823-829, or Dubnau and Davidoff-Abelson, 1971, J. Mol. Biol. 56: 209-221), electroporation (see, e.g., Shigekawa and Dower, 1988, Biotechniques 6: 742-751), or conjugation (see, e.g., Koehler and Thorne, 1987, J. Bacteriol. 169: 5271-5278).
The host cell may also be a eukaryote, such as a plant, or fungal cell. The fungal host cell may be a yeast cell e.g. Kluyveromyces, Pichia, Saccharomyces or Schizosaccharomyces. Fungal cells may be transformed by a process involving protoplast formation, transformation of the protoplasts, and regeneration of the cell wall in a manner known per se. Yeast may be transformed using the procedures described by Becker and Guarente, In Abelson, J. N. and Simon, M. I., editors, Guide to Yeast Genetics and Molecular Biology, Methods in Enzymology, Volume 194, pp 182-187, Academic Press, Inc., New York; Ito et al., 1983, J. Bacteriol. 153: 163; and Hinnen et al., 1978, Proc. Natl. Acad. Sci. USA 75: 1920.
A suitable method of producing a polypeptide comprises: (a) cultivating a host cell of under conditions suitable for expression of the polypeptide; and (b) recovering the polypeptide.
The host cells are cultivated in a nutrient medium suitable for production of the polypeptide using methods known in the art. For example, the cell may be cultivated by shake flask cultivation, or small-scale or large-scale fermentation (including continuous, batch, fed-batch, or solid state fermentations) in laboratory or industrial fermentors performed in a suitable medium.
The polypeptide may be detected using methods known in the art. Suitable detection methods include, but are not limited to, use of specific antibodies, formation of an enzyme product, or disappearance of an enzyme substrate. For example, an enzyme assay may be used to determine the alpha-amylase activity of the polypeptide (see Examples).
The polypeptide may be recovered using methods known in the art. For example, the polypeptide may be recovered from the nutrient medium by conventional procedures including, but not limited to, collection, centrifugation, filtration, extraction, spray-drying, evaporation, or precipitation. The polypeptide may be purified by a variety of procedures known in the art including, but not limited to, chromatography (e.g., ion exchange, affinity, hydrophobic, chromatofocusing, and size exclusion), electrophoretic procedures (e.g., preparative isoelectric focusing), differential solubility (e.g., ammonium sulfate precipitation), SDS-PAGE, or extraction (see, e.g., Protein Purification, Janson and Ryden, editors, VCH Publishers, New York, 1989) to obtain substantially pure polypeptides.
Any detergent components known in the art for use in laundry detergents may also be utilized. Other optional detergent components include anti-corrosion agents, anti-shrink agents, anti-soil redeposition agents, anti-wrinkling agents, bactericides, binders, corrosion inhibitors, disintegrants/disintegration agents, dyes, enzyme stabilizers (including boric acid, borates, CMC, and/or polyols such as propylene glycol), fabric conditioners including clays, fillers/processing aids, fluorescent whitening agents/optical brighteners, foam boosters, foam (suds) regulators, perfumes, soil-suspending agents, softeners, suds suppressors, tarnish inhibitors, and wicking agents, either alone or in combination. Any ingredient known in the art for use in laundry detergents may be utilized. The choice of such ingredients is well within the skill of the artisan.
The detergent composition according to the invention may also comprise dispersants. In particular powdered detergents may comprise dispersants. Suitable water-soluble organic materials include the homo- or co-polymeric acids or their salts, in which the polycarboxylic acid comprises at least two carboxyl radicals separated from each other by not more than two carbon atoms. Suitable dispersants are for example described in Powdered Detergents, Surfactant science series volume 71, Marcel Dekker, Inc. The detergent composition according to the invention may also comprise one or more dye transfer inhibiting agents. Suitable polymeric dye transfer inhibiting agents include, but are not limited to, polyvinylpyrrolidone polymers, polyamine N-oxide polymers, copolymers of N-vinylpyrrolidone and N-vinylimidazole, polyvinyloxazolidones and polyvinylimidazoles or mixtures thereof. When present in a subject composition, the dye transfer inhibiting agents may be present at levels from about 0.0001% to about 10%, from about 0.01% to about 5% or even from about 0.1% to about 3% by weight of the composition. A detergent composition according to the invention may preferably also comprise additional components that may tint articles being cleaned, such as fluorescent whitening agent or optical brighteners. Where present the brightener is preferably at a level of about 0.01% to about 0.5%. Any fluorescent whitening agent suitable for use in a laundry detergent composition may be used in the composition. The most commonly used fluorescent whitening agents are those belonging to the classes of diaminostilbene-sulphonic acid derivatives, diarylpyrazoline derivatives and bisphenyl-distyryl derivatives. Examples of the diaminostilbene-sulphonic acid derivative type of fluorescent whitening agents include the sodium salts of: 4,4′-bis-(2-diethanolamino-4-anilino-s-triazin-6-ylamino) stilbene-2,2′-disulphonate; 4,4′-bis-(2,4-dianilino-s-triazin-6-ylamino) stilbene-2.2′-disulphonate; 4,4′-bis-(2-anilino-4(N-methyl-N-2-hydroxy-ethylamino)-s-triazin-6-ylamino) stilbene-2,2′-disulphonate, 4,4′-bis-(4-phenyl-2,1,3-triazol-2-yl)stilbene-2,2′-disulphonate; 4,4′-bis-(2-anilino-4(1-methyl-2-hydroxy-ethylamino)-s-triazin-6-ylamino) stilbene-2,2′-disulphonate and 2-(stilbyl-4″-naptho-1,2′:4,5)-1,2,3-trizole-2″-sulphonate. Preferred fluorescent whitening agents are Tinopal DMS and Tinopal CBS available from Ciba-Geigy AG, Basel, Switzerland. Tinopal DMS is the disodium salt of 4,4′-bis-(2-morpholino-4 anilino-s-triazin-6-ylamino) stilbene disulphonate. Tinopal CBS is the disodium salt of 2,2′-bis-(phenyl-styryl) disulphonate. Also preferred are fluorescent whitening agents is the commercially available Parawhite KX, supplied by Paramount Minerals and Chemicals, Mumbai, India. Other fluorescers suitable for use include the 1-3-diaryl pyrazolines and the 7-alkylaminocoumarins.
Suitable fluorescent brightener levels include lower levels of from about 0.01, from 0.05, from about 0.1 or even from about 0.2 wt % to upper levels of 0.5 or even 0.75 wt %. The detergent composition according to the invention may also comprise one or more soil release polymers which aid the removal of soils from fabrics such as cotton and polyester based fabrics, in particular the removal of hydrophobic soils from polyester based fabrics. The soil release polymers may for example be nonionic or anionic terephthalte based polymers, polyvinyl caprolactam and related copolymers, vinyl graft copolymers, polyester polyamides see for example Chapter 7 in Powdered Detergents, Surfactant science series volume 71, Marcel Dekker, Inc. Another type of soil release polymers are amphiphilic alkoxylated grease cleaning polymers comprising a core structure and a plurality of alkoxylate groups attached to that core structure. The core structure may comprise a polyalkylenimine structure or a polyalkanolamine structure as described in detail in WO 2009/087523 (hereby incorporated by reference). Furthermore random graft co-polymers are suitable soil release polymers Suitable graft co-polymers are described in more detail in WO 2007/138054, WO 2006/108856 and WO 2006/113314 (hereby incorporated by reference). Other soil release polymers are substituted polysaccharide structures especially substituted cellulosic structures such as modified cellulose deriviatives such as those described in EP 1867808 or WO 2003/040279 (both are hereby incorporated by reference). Suitable cellulosic polymers include cellulose, cellulose ethers, cellulose esters, cellulose amides and mixtures thereof. Suitable cellulosic polymers include anionically modified cellulose, nonionically modified cellulose, cationically modified cellulose, zwitterionically modified cellulose, and mixtures thereof. Suitable cellulosic polymers include methyl cellulose, carboxy methyl cellulose, ethyl cellulose, hydroxyl ethyl cellulose, hydroxyl propyl methyl cellulose, ester carboxy methyl cellulose, and mixtures thereof. The detergent composition according to the invention may also comprise one or more anti-redeposition agents such as carboxymethylcellulose (CMC), polyvinyl alcohol (PVA), polyvinylpyrrolidone (PVP), polyoxyethylene and/or polyethyleneglycol (PEG), homopolymers of acrylic acid, copolymers of acrylic acid and maleic acid, and ethoxylated polyethyleneimines. The cellulose based polymers described under soil release polymers above may also function as anti-redeposition agents.
Other suitable adjunct materials include, but are not limited to, anti-shrink agents, anti-wrinkling agents, bactericides, binders, carriers, dyes, enzyme stabilizers, fabric softeners, fillers, foam regulators, hydrotropes, perfumes, pigments, suds suppressors, solvents, structurants for liquid detergents and/or structure elasticizing agents.
Thus, in one particular embodiment, the detergent composition further comprises at least one chelating agent; at least one surfactant; at least one sulfonated polymer; at least one hydrotrope; at least one builder and/or co-builder; at least one perfume; and/or at least one kind of bleaching system.
The detergent composition according to the invention may be in any convenient form, e.g., a bar, a homogenous tablet, a tablet having two or more layers, a regular or compact powder, a granule, a paste, a gel, or a regular, compact or concentrated liquid. A detergent composition according to the invention may be formulated, for example, as a hand or machine laundry detergent composition including a laundry additive composition suitable for pre-treatment of stained fabrics and a rinse added fabric softener composition, or be formulated as a detergent composition for use in general household hard surface cleaning operations, or be formulated for hand or machine dishwashing operations.
Thus, in one embodiment, the detergent composition according to the present invention is a liquid laundry detergent composition, a powder laundry detergent composition, a liquid dishwash detergent composition, or a powder dishwash detergent composition. In an embodiment, the composition is a liquid or powder automatic dishwashing (ADW) detergent composition; or a liquid manual dishwashing detergent composition.
Suitable dishwashing detergent compositions include:
(b)NON-AQUEOUS LIQUID AUTOMATIC DISHWASHING COMPOSITION
(d)NON-AQUEOUS LIQUID DISHWASHING COMPOSITION
Detergent formulation forms: Layers (same or different phases), Pouches, versus forms for Machine dosing unit.
Pouches may be configured as single or multicompartments. It can be of any form, shape and material which is suitable for holding the composition, e.g. without allowing the release of the composition from the pouch prior to water contact. The pouch is made from water soluble film which encloses an inner volume. Said inner volume can be divided into compartments of the pouch. Preferred films are polymeric materials preferably polymers which are formed into a film or sheet. Preferred polymers, copolymers or derivatives thereof are selected polyacrylates, and water soluble acrylate copolymers, methyl cellulose, carboxy methyl cellulose, sodium dextrin, ethyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, malto dextrin, poly methacrylates, most preferably polyvinyl alcohol copolymers and, hydroxyprpyl methyl cellulose (HPMC). Preferably the level of polymer in the film for example PVA is at least about 60%. Preferred average molecular weight will typically be about 20,000 to about 150,000. Films can also be of blend compositions comprising hydrolytically degradable and water soluble polymer blends such as polyactide and polyvinyl alcohol (known under the Trade reference M8630 as sold by Chris Craft In. Prod. Of Gary, Ind., US) plus plasticisers like glycerol, ethylene glycerol, Propylene glycol, sorbitol and mixtures thereof. The pouches can comprise a solid laundry cleaning composition or part components and/or a liquid cleaning composition or part components separated by the water soluble film. The compartment for liquid components can be different in composition than compartments containing solids. Ref: (US2009/0011970 A1)
Detergent ingredients may be separated physically from each other by compartments in water dissolvable pouches or in different layers of tablets. Thereby negative storage interaction between components can be avoided. Different dissolution profiles of each of the compartments can also give rise to delayed dissolution of selected components in the wash solution.
A liquid or gel detergent, which is not unit dosed, may be aqueous, typically containing at least 20% by weight and up to 95% water, such as up to about 70% water, up to about 65% water, up to about 55% water, up to about 45% water, up to about 35% water. Other types of liquids, including without limitation, alkanols, amines, diols, ethers and polyols may be included in an aqueous liquid or gel. An aqueous liquid or gel detergent may contain from 0-30% organic solvent.
A liquid or gel detergent may be non-aqueous.
The invention provides a use of a detergent composition in a domestic or industrial cleaning process. A cleaning process may for example be a dishwashing process, such as automated dishwashing; a laundry process; or cleaning of hard surfaces such as bathroom tiles, floors, table tops, drains, sinks and washbasins.
Dishwashing
An automated dishwashing process may comprise the following steps:
a. Exposing dishware to an aqueous wash liquor comprising a detergent composition;
b. Completing at least one wash cycle; and
c. Optionally rinsing and drying the dishware.
Thus, the invention provides a method of dishwashing in an automatic dishwashing machine using a detergent composition as described herein, comprising the steps of adding said detergent composition in a detergent composition compartment in said automatic dishwashing machine, and releasing said detergent composition during a main-wash cycle.
The compositions may be employed at concentrations from about 1000-8000 ppm in the wash liquor, such as 2000-6000 ppm in the wash liquor. The hardness of the wash liquor may be 3-30° dH. The pH of the wash liquor may be 3-11, such as 7-11.
The temperature of the wash liquor when used may be in the range of 10-70° C. For example the temperature of the wash liquor can be in the range of 15-60° C., in the range of 20-50° C., in the range of 25-50° C., in the range of 30-45° C., in the range of 35-40° C., in the range of 35-55° C., or in the range of 40-50° C.
The temperature may vary throughout the wash program. One enzyme may be activated at one active temperature range and other enzymes may be activated at another active temperature range differing from the active temperature range of the first enzyme. For example, one or more wash cycles may be carried out at a temperature of 32-38° C. and other wash cycles may be carried out at a temperature of 45-55° C. The advantage of this is that the single enzymes are allowed to work at their optimal temperature. The optimal temperature of the enzymes of a detergent composition may vary but is typically in the range of 65-70° C. for proteases and in the range of 55-65° C. for amylases. The optimal temperature may be determined by different assays, such as comparing the activity over a 15 min period of time in a buffered solution at different temperatures.
During or after completion of a wash cycle the dishware can be rinsed with water or with water comprising a rinsing aid. The effectiveness of the cleaning can be further improved if an acidic rinsing aid is used. The rinsing aid should be capable of lowering the pH below 4 during at least a period of the rinsing step. The pH may be even further lowered e.g. to below pH 3.5, such as below pH 3, below pH 2.5 or below pH 2. The period of lowering the pH may be at least 1 minute, such as at least 2 minutes, at least 3 minutes, at least 4 minutes, at least 5 minutes, at least 6 minutes or at least 7 minutes. The period of lowering the pH may even be as long as the time period for the full rinsing step.
The ability of lowering the pH during the rinsing step is due to a buffering agent. A buffer with strong buffer capacity at low pH, from pH 4 and below should be selected. The buffer capacity should correspond to the same effect as the pH drop was done with 15 ml 4M HCL/rinse cycle. The ability of lowering the pH during the rinsing step is due to a buffering agent selected from the group consisting of citric acid, acetic acid, potassium dihydrogen phosphate, boric acid, diethyl barbituric acid, Carmody buffer and Britton-Robinson buffer.
The rinsing aid can further improve the cleaning of the dishware by rinsing away any soil released from the dishware during the washing cycle. In addition, the acidic rinsing aid prevents precipitation of calcium on the dishware.
Laundering
Laundry processes can for example be household laundering, but it may also be industrial laundering. A process for laundering of fabrics and/or garments may be a process comprises treating fabrics with a washing solution containing a detergent composition as described herein. A cleaning process or a textile care process can for example be carried out in a machine washing process or in a manual washing process.
The fabrics and/or garments subjected to a washing, cleaning or textile care process may be conventional washable laundry, for example household laundry. Preferably, the major part of the laundry is garments and fabrics, including knits, woven, denims, non-woven, felts, yarns, and towelling. The fabrics may be cellulose based such as natural cellulosics, including cotton, flax, linen, jute, ramie, sisal or coir or manmade cellulosics (e.g., originating from wood pulp) including viscose/rayon, ramie, cellulose acetate fibres (tricell), lyocell or blends thereof. The fabrics may also be non-cellulose based such as natural polyamides including wool, camel, cashmere, mohair, rabbit and silk or synthetic polymer such as nylon, aramid, polyester, acrylic, polypropylene and spandex/elastane, or blends thereof as well as blend of cellulose based and non-cellulose based fibres.
In one aspect, the present invention relates to a method of laundering in an automatic laundering machine using a detergent composition as described herein, comprising the steps of adding said detergent composition in a detergent composition compartment in said automatic laundering machine, and releasing said detergent composition during a main wash cycle. In another aspect, the present invention relates to a method of laundering, comprising laundering a garment with a detergent composition as described herein, preferably at a temperature of 40° C. or less, or more preferably at a temperature of 30° C. or less, or even more preferably at a temperature of 20° C. or less.
These methods include a method for laundering a fabric. The method comprises the steps of contacting a fabric to be laundered with a cleaning laundry solution comprising a detergent composition. The fabric may comprise any fabric capable of being laundered in normal consumer use conditions. The solution preferably has a pH from about 5.5 to about 11.5. The compositions may be employed at concentrations from about 100 ppm, preferably 500 ppm to about 15,000 ppm in solution. The water temperatures typically range from about 5° C. to about 95° C., including about 10° C., about 15° C., about 20° C., about 25° C., about 30° C., about 35° C., about 40° C., about 45° C., about 50° C., about 55° C., about 60° C., about 65° C., about 70° C., about 75° C., about 80° C., about 85° C. and about 90° C. The water to fabric ratio is typically from about 1:1 to about 30:1.
In particular embodiments, the washing method is conducted at a degree of hardness of from about 0° dH to about 30° dH. Under typical European wash conditions, the degree of hardness is about 16° dH, under typical US wash conditions about 6° dH, and under typical Asian wash conditions, about 3° dH.
As will be evident from the Examples below, the detergent compositions of the invention exhibit exceptional wash performance against certain types of soilings that are particularly challenging to remove, most notably chocolate pudding soilings (obtained from Center For Test materials BV, P.O. Box 120, 3133 KT, Vlaardingen, The Netherlands—also see Examples).
Thus, one aspect of the invention provides the use of a detergent composition as described herein for cleaning chocolate pudding soilings, for example in a domestic or industrial cleaning process which may be cleaning of fabric, such as laundry, hard surface cleaning such as dishwashing, particularly automatic dishwashing. Another aspect of the invention provides a method for removal of chocolate pudding soilings from fabric or hard surfaces comprising contacting the fabric or hard surfaces contaminated with chocolate pudding soilings with a detergent composition as described herein. In one embodiment, the method is for cleaning of fabric, for example laundry. In another embodiment, the method is for hard surface cleaning, for example dishwashing, for example as performed using an automated dishwasher. As described in Example 2, the alpha-amylase and the protease exhibited synergy in wash performance. It is therefore envisaged that a detergent composition could comprise reduced amounts of the two enzymes and still provide for a wash performance that is comparable to that of a detergent comprising a larger amount of only one of the enzymes i.e. protease alone or alpha-amylase alone.
The present invention is further described by the following examples that should not be construed as limiting the scope of the invention.
Automatic Mechanical Stress Assay (AMSA) for laundry
In order to assess the wash performance in laundry, washing experiments are performed using the Automatic Mechanical Stress Assay (AMSA). With the AMSA, the wash performance of a large quantity of small volume enzyme-detergent solutions can be examined. The AMSA plate has a number of slots for test solutions and a lid firmly squeezing the laundry sample, the textile to be washed against all the slot openings. During the washing time, the plate, test solutions, textile and lid are vigorously shaken to bring the test solution in contact with the textile and apply mechanical stress in a regular, periodic oscillating manner. For further description see WO02/42740 especially the paragraph “Special method embodiments” at page 23-24.
The wash performance is measured as the brightness of the colour of the textile washed. Brightness can also be expressed as the intensity of the light reflected from the sample when illuminated with white light. When the sample is stained the intensity of the reflected light is lower, than that of a clean sample. Therefore the intensity of the reflected light can be used to measure wash performance.
Colour measurements are made with a professional flatbed scanner (Kodak iQsmart, Kodak, Midtager 29, DK-2605 Brøndby, Denmark), which is used to capture an image of the washed textile.
To extract a value for the light intensity from the scanned images, 24-bit pixel values from the image are converted into values for red, green and blue (RGB). The intensity value (Int) is calculated by adding the RGB values together as vectors and then taking the length of the resulting vector.
The proteolytic activity can be determined by a method employing the Suc-AAPF-PNA substrate. Suc-AAPF-PNA is an abbreviation for N-Succinyl-Alanine-Alanine-Proline-Phenylalanine-p-Nitroanilide, and it is a blocked peptide which can be cleaved by endo-proteases. Following cleavage a free PNA molecule is liberated and it has a yellow colour and thus can be measured by visible spectrophotometry at wavelength 405 nm. The Suc-AAPF-PNA substrate is manufactured by Bachem (cat. no. L1400, dissolved in DMSO).
The protease sample to be analysed was diluted in residual activity buffer (100 mM Tris pH8.6). The assay was performed by transferring 60 μl of diluted enzyme samples to 96 well microtiter plate and adding 140 μl substrate working solution (0.72 mg/ml in 100 mM Tris pH8.6). The solution was mixed at room temperature and absorption is measured every 20 sec. over 5 minutes at OD 405 nm.
The slope (absorbance per minute) of the time dependent absorption-curve is directly proportional to the specific activity (activity per mg enzyme) of the protease in question under the given set of conditions. The protease sample should be diluted to a level where the slope is linear.
Alpha-Amylase Activity Assay—pNP-G7 Assay
The alpha-amylase activity may be determined by a method employing the G7-pNP substrate. G7-pNP which is an abbreviation for 4,6-ethylidene(G7)-p-nitrophenyl(G1)-α,D-maltoheptaoside, a blocked oligosaccharide which can be cleaved by an endo-amylase, such as an alpha-amylase. Following the cleavage, the alpha-Glucosidase included in the kit digest the hydrolysed substrate further to liberate a free PNP molecule which has a yellow color and thus can be measured by visible spectophometry at λ=405 nm (400-420 nm.). Kits containing G7-pNP substrate and alpha-Glucosidase is manufactured by Roche/Hitachi (cat. No.11876473).
The G7-pNP substrate from this kit contains 22 mM 4,6-ethylidene-G7-pNP and 52.4 mM HEPES (2-[4-(2-hydroxyethyl)-1-piperaziny]-ethanesulfonic acid), pH 7.0).
The alpha-Glucosidase reagent contains 52.4 mM HEPES, 87 mM NaCl, 12.6 mM MgCl2, 0.075 mM CaCl2), >4 kU/L alpha-glucosidase).
The substrate working solution is made by mixing 1 mL of the alpha-Glucosidase reagent with 0.2 mL of the G7-pNP substrate. This substrate working solution is made immediately before use.
Dilution buffer: 50 mM MOPS, 0.05% (w/v) Triton X100 (polyethylene glycol p-(1,1,3,3-tetramethylbutyl)-phenyl ether (C14H22O(C2H4O)n (n=9-10))), 1 mM CaCl2), pH8.0.
The amylase sample to be analyzed is diluted in dilution buffer to ensure the pH in the diluted sample is 7. The assay is performed by transferring 20 μl diluted enzyme samples to 96 well microtiter plate and adding 80 μl substrate working solution. The solution is mixed and pre-incubated 1 minute at room temperature and absorption is measured every 20 sec. over 5 minutes at OD 405 nm.
The slope (absorbance per minute) of the time dependent absorption-curve is directly proportional to the specific activity (activity per mg enzyme) of the alpha-amylase in question under the given set of conditions. The amylase sample should be diluted to a level where the slope is below 0.4 absorbance units per minute.
The alpha-amylase activity may also be determined by a method using the Phadebas substrate (from for example Magle Life Sciences, Lund, Sweden). A Phadebas tablet includes interlinked starch polymers that are in the form of globular microspheres that are insoluble in water. A blue dye is covalently bound to these microspheres. The interlinked starch polymers in the microsphere are degraded at a speed that is proportional to the alpha-amylase activity. When the alpha-amylase degrades the starch polymers, the released blue dye is water soluble and concentration of dye can be determined by measuring absorbance at 620 nm. The concentration of blue is proportional to the alpha-amylase activity in the sample.
The alpha-amylase sample to be analyzed is diluted in activity buffer with the desired pH. Two substrate tablets are suspended in 5 mL activity buffer and mixed on magnetic stirrer. During mixing of substrate transfer 150 μl to microtiter plate (MTP) or PCR-MTP. Add 30 μl diluted amylase sample to 150 μl substrate and mix. Incubate for 15 minutes at 37° C. The reaction is stopped by adding 30 μl 1M NaOH and mix. Centrifuge MTP for 5 minutes at 4000×g. Transfer 100 μl to new MTP and measure absorbance at 620 nm.
The alpha-amylase sample should be diluted so that the absorbance at 620 nm is between 0 and 2.2, and is within the linear range of the activity assay.
The alpha-amylase activity may also be determined by a method using the Amylazyme substrate (Megazyme® Amylazyme Test, supplied by Megazyme for the assay of cereal and bacterial amylases) comprising AZCL-amylose, which has been mixed with lactose and magnesium stearate and tabletted. A blue dye is covalently bound to these microspheres. The interlinked amylose polymers in the microsphere are degraded at a speed that is proportional to the alpha-amylase activity. When the alpha-amylase degrades the starch polymers, the released blue dye is water soluble and concentration of dye may be determined by measuring absorbance at 590 nm. The concentration of blue is proportional to the alpha-amylase activity in the sample.
The alpha-amylase sample to be analysed is diluted in activity buffer with the desired pH. Two substrate tablets are suspended in 5 mL activity buffer and mixed on magnetic stirrer. During mixing of substrate 150 μl is transferred to a microtiter plate (MTP) or PCR-MTP. Next, 25 μl diluted amylase sample is added to 150 μl substrate and mixed. The mixture is incubated for 10 minutes at 37° C. The reaction is stopped by adding 25 μl 1M NaOH and mixed. MTP is centrifuged for 5 minutes at 4000×g, followed by transferring 100 μl to a new MTP and absorbance is measured at 590 nm.
The variants evaluated in the present examples were generated by methods well-known to the skilled person, such as site-directed mutagenesis. The variants were cultured under optimal conditions, purified and evaluated according to the examples below.
In order to assess the wash performance of the polypeptides of the present invention in a detergent base composition, washing experiments may be performed using full scale Automatic Dish Wash (ADW). The full scale ADW setup is used for testing the wash performance of polypeptides in test conditions mimicking a regular consumer setup.
In the present study, test conditions were a regular 45° C. wash program using a Miele Dishwasher GSL2 machine.
Melamine tiles stained with Chocolate Pudding (DM-75) (from Center For Test materials BV, P.O. Box 120, 3133 KT, Vlaardingen, The Netherlands) were used as test material and washed at “R45° C./8 min/KI55° C.” program in presence of 50 g of IKW cleaning soil using water with 19° dH, as specified below (see Tables 1 and 2). Two tiles of each stain type were added to each automatic dishwashing machine. Four replicates were carried out and an average for each test condition was calculated.
After five minutes of running the machine program, the detergent and the enzyme(s) were added at a concentration of 3 mg polypeptide/wash for the alpha-amylase or 30 mg polypeptide/wash for the protease. After thorough rinse under running tap water and drying in the dark, the light intensity values of the stained tiles were subsequently measured as a measure for wash performance. The full scale wash performance experiments were conducted under the experimental conditions specified below:
After washing the melamine tiles were flushed in tap water and dried.
The wash performance was measured as remission units. The remission measurements were made with a Color-Eye 7000 (CE7000) instrument used for taking spectra and performing calculations of remission and/or color difference. The remission was measured at 460 nm with no UV light in the illuminant.
In these tests, amylase was tested alone; each of the four proteases P1 to P4 were tested alone; and each protease was also tested in combination with amylase. Results are presented in Table 5. The “expected additive effect” is the light remission expected if the protease and amylase act additively. The “synergy” is the actual light remission measured when the protease and the amylase are combined, minus the “expected additive effect”. The “synergy” therefore reflects the increase in wash performance that the combination of enzymes achieves compared to the additive effects of their individual performance.
Design of experiment was used to plan the trials. Subsequently an ANOVA model was used to evaluate wash performance data. Tukey's HSD test was used to show statistically significant synergistic effects. The HSD value was calculated to be 7.8. Thus, any absolute mean difference larger than 7was considered to be significant (p<0.05). All tested combinations were shown to be significant as compared to the tests done with only one enzyme, i.e. either amylase alone or protease alone.
| Number | Date | Country | Kind |
|---|---|---|---|
| 16164480.2 | Apr 2016 | EP | regional |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2017/058358 | 4/7/2017 | WO | 00 |
