Patent Grant
8703460
This is a national stage of PCT/AT09/000364 filed Sep. 18, 2009 and published in German, which claims the priority of Austria number GM 501/2008 filed Sep. 18, 2008, hereby incorporated by reference.
The present invention relates to a method for producing an additive for the enzymatic degradation of fumonisins, an additive for the enzymatic degradation of fumonisins, in vegetable raw materials and mixtures containing vegetable raw materials, as well as the use of genes.
Mycotoxins very frequently occur on agricultural vegetable products and, depending on the type of mycotoxins, inflict severe economic damage, in particular, in the foods produced from agricultural products and even in animals and humans fed with such foods, said damage being extremely manifold. Numerous methods have already been developed, trying to detoxify or degrade, or render harmless, such mycotoxins in order to inhibit any damage caused by mycotoxins in the fields of animal and human nutrition, animal breeding, food and feed processing and the like.
Known mycotoxins comprise a plurality of structurally interrelated mycotoxins such as, for instance, fumonisins, among which fumonisin B1 is the most frequently occurring toxin of the group. There are, however, numerous derivatives and related molecules which are also known to exhibit noxious effects in humans and animals. Thus, it is known that fumonisins impair the sphingolipid metabolism by interacting with the enzyme ceramide synthase. Sphingolipids not only are components of cell membranes, but also play an important role as signal and messenger molecules in many elementary cellular processes like cell growth, cell migration and cell binding, in inflammatory processes and intracellular transport procedures. Due to this impairment of the sphingolipid metabolism, fumonisins have been made responsible for the toxic effects on various animal species and also humans. It could, thus, demonstrated that fumonisins have cancerogenic effects in rodents, and, based on epidemiologic data, they have been associated with esophageal cancer and neural tube defects in humans. They have been held responsible for the typical toxicosis caused by pulmonary edemas, for instance, in various animal species such as, e.g., swine. In this context, fumonisins constitute an almost ubiquitous contamination source on various cereal crops, in particular corn as well as nuts and vegetables, and this strongly negative effect relating to the health of humans and animals is not to be neglected.
The microbial degradation of fumonisins has already been described in EP-A 1 860 954, according to which microorganisms are used to detoxify fumonisins and fumonisin derivatives by adding to feeds detoxifying bacteria or yeasts selected from precisely defined strains for detoxifying fumonisins.
Catabolic metabolic paths for the biological degradation of fumonisins and the genes and enzymes responsible therefor have already been described too. Thus, EP 0 988 383, for instance, describes fumonisin-detoxifying compositions and methods, wherein the fumonisin-degrading enzymes used are above all produced in transgenic plants in which the detoxification of fumonisins is effected using an amine oxidase that requires molecular oxygen for its enzymatic activity.
Moreover, WO 2004/085624 describes transaminases, deaminsases and aminomutases as well as compositions and methods for the enzymatic detoxification to detoxify, in particular, aminated toxins, e.g. fumonisins. In this context, polypeptides possessing deaminase activity are used for detoxification.
From WO 00/04158, the use of fumonisin-degrading amine oxidases in the production of foods or feeds and in the processing of vegetable raw materials has become known.
Hitherto known methods, however, have in common that, in order to detoxify mycotoxins, they require molecular oxygen for the described catabolic metabolic paths, yet the amine oxidases, which are particularly required, cannot work under oxygen-independent conditions. The use of such genes and enzymes for the detoxification of feeds, for instance in the digestive tracts of animals, is not possible because of the substantially oxygen-free environment in the digestive tracts of animals, the known genes and enzymes thus exhibiting no activity.
The invention aims to provide a method for producing an additive for the enzymatic degradation of mycotoxins, by which it is feasible to safely and reliably degrade to toxicologically harmless substances, or detoxify, fumonisins.
To solve these objects, the method according to the invention is conducted in a manner that at least one nucleic acid sequence of genes corresponding to sequences ID Nos. 1, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22 and 24 is provided, the at least one nucleic acid sequence is expressed in prokaryotic or eukaryotic host cells, and at least one thus prepared enzyme corresponding to sequences ID Nos. 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23 and 25, optionally along with a cosubstrate, are used in a vegetable raw material. By providing at least one nucleic acid sequence of genes corresponding to sequences ID Nos. 1, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22 and 24, it is feasible to clone and express specific fumonisin- or mycotoxin-degrading genes, the expression being, for instance, conducted in E. coli and Pichia pastoris using standard processes, by which expression enzymes corresponding to sequences ID Nos. 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23 and 25 will be obtained, wherein the at least one enzyme is optionally used along with a cosubstrate on a raw material to be treated. An additive produced according to such a method, on the one hand, allows for to completely and reliably degrade, for instance, mycotoxins directly on raw materials, with the specific enzymes produced by this method catalyzing the degradation of fumonisins and intermediates of the degradation path, and, on the other hand, allows for to degrade mycotoxins, for instance directly during the production of bioethanol in the mash for the production of alcohol, or to degrade and render harmless mycotoxins even during the production of foods directly in the production process.
Vegetable raw materials in this context include cereals or cereal products, grasses, fruits or vegetables and intermediate products containing these substances for the production of foods and feeds such as, for instance, silage, fruit mash or the like.
Additives in this context are especially feed additives, food additives as well as additives for the production of bioethanol.
A method of this type further enables to maintain the sphingolipid metabolism impaired by the interaction of fumonisins with the enzyme ceramide synthase while, at the same, biologically degrading the fumonisins to non-toxic substances. Finally, technological detoxification applications will be achieved since this method is also applicable on a larger technical scale, thus enabling the safe and reliable production of mycotoxin-free products by the method according to the invention.
The nucleic acid sequences used in the method according to the invention, and the enzymes expressed in prokaryotic and eukaryotic host cells by said nucleic acid sequences and catalytically acting in an oxygen-independent environment, are listed below.
According to a preferred further development, the method according to the invention is conducted in a manner that fumonisins are degraded in an oxygen-independent or anaerobic manner. By degrading the fumonisins in an oxygen-independent manner, it is feasible to further develop the method according to the invention to the effect that the nucleic acid sequences of genes or enzymes will perform the degradation reactions safely and reliably without any addition of molecular oxygen so as to make the thus produced additive usable in any oxygen-independent or anaerobic media where mycotoxins will possibly have to be degraded, such as, for instance, in foods for humans and animals, in the production of bioethanol, but also for the production of genetically modified agricultural crops.
According to a further development, the method according to the invention is conducted in a manner that, prior to the use of the enzymes in the vegetable starting material, the former are modified by molecular-genetic methods, mutagenesis or molecular evolution. By conducting the method in a manner that the enzymes, prior to their use in the vegetable starting material, are modified by molecular-genetic methods, mutagenesis or molecular evolution, it is feasible to produce the enzymes in an even more stable form adapted to the subsequent purpose of use so as to even further improve or perfect the oxygen-independent degradation of fumonisins.
According to a preferred further development of the invention, the method is conducted in a manner that the enzymes are isolated. By conducting the method in this manner, fumonisins, in particular, will be completely degraded in an oxygen-independent manner.
According to another preferred further development of the invention, the method is conducted in a manner that the enzymes are encapsulated in a protective coating. By encapsulating the enzymes in a protective coating, it is feasible to transport the enzymes to their destination of use, for instance, in particular, into the digestive tract without being changed and, in particular, degraded or damaged, so that the enzymes will not start acting before the dissolution of the protective coating, for instance in the gastrointestinal tracts of humans or animals, thus ensuring an even more selective, rapid and complete degradation of the mycotoxins in the oxygen-independent environment of the gastrointestinal tract while, at the same time, preventing fumonisins from exerting their noxious effects on living creatures which have taken in the same together with food.
According to a preferred further development, the method according to the invention is conducted in a manner that the enzymes are selected from permease ID No. 3, carboxylesterase ID No. 9, tricarballylate dehydrogenase ID No. 11, citrate utilization protein ID No. 13, alcohol dehydrogenase ID No. 17, aminotransferase ID No. 19 and/or acetolactate synthase ID No. 23. By conducting the method in this manner, fumonisins can be smoothly and completely degraded in an oxygen-independent environment. In this case, the transcription of the open reading frames in the FUM gene clusters isolated from the gene cluster of the nucleic acid sequence ID No. 1, which is derived from a prokaryotic strain having the accession number DSM 16254, is controlled by a bidirectional promoter located between FumA and FumI, as is apparent from Table 1 below. The clusters encode proteins which are involved in the regulation of the gene expression, like e.g. FumB and FumC, in the sampling of the substrate and its transport, like e.g. FumA, FumJ, FumG, and in the catabolism of the substrate, like e.g. FumD, FumE, FumF, FumH, FumI, FumK. From these nucleic acid sequences which encode special genes and enzymes, those genes were selected according to a preferred further development of the method according to the invention, which are responsible for the catabolism of the substrate, thus enabling the respectively formed enzymes to completely catabolise the substrate, i.e. fumonisins.
In this case, open reading frames selected, for instance, from the gene cluster of the nucleic acid sequence having ID No. 1 are expressed in prokaryotic or eukaryotic host cells. The transcription of the open reading frames contained in the gene cluster having SEQ ID No. 1, in the bacterial strain with the accession number DSM 16254, takes place in a manner controlled by a bidirectional promoter located between fumA and fumI, as is apparent from the annexed
In the Table 1 below, the designations of the genes of the fumonisin-catabolized gene cluster are listed, wherein O indicates the orientation, namely f forward and r reverse.
By preferably conducting the method according to the invention in a manner that an enzyme is used, which comprises at least 90% sequence identity with at least one of the enzymes having ID No. 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23 or 25, an even more complete degradation of the fumonisins will be ensured, whereby not only fumonisins but also related or structurally similar mycotoxins will, at the same time, be completely detoxified, particularly in anaerobic or oxygen-independent environments, such as e.g. AAL-toxin.
By preferably conducting the method in a manner that, when using aminotransferase ID No. 19, an α-keto acid is used as a cosubstrate, it is possible, in particular with the degradation of the amino group of fumonisin and the simultaneous use of an α-keto acid such as, e.g., pyruvic acid, to substitute a keto group for the amino group on the fumonisin molecule with alanine forming as a side product of this reaction, which is totally harmless, thus ensuring the complete degradation of fumonisins to harmless substances.
According to a preferred further development, the method according to the invention may also be conducted in a manner that, when using carboxylesterase ID No. 9, at least one adsorbent selected, in particular, from clay minerals is additionally used. By additionally using at least one adsorbent selected, in particular, from clay minerals when using carboxylesterase ID No. 9, it is possible to render fumonisins totally harmless even without the addition of any further enzymes, by cleaving the two tricarballylic acid side chains by the carboxylesterase from the fumonisin molecule in a first step and forming what is called hydrolyzed fumonisin. Hydrolyzed fumonisin, which is a substantially chain-like molecule, can subsequently be adsorbed, for instance, on clay minerals so as to enable fumonisins to be rendered completely harmless even in a one-step enzymatic degradation process.
According to a preferred further development, the method according to the invention is conducted in a manner that the thus produced additive is used in a vegetable starting material to be fermented or in a mash for the production of bioethanol. By using the additive produced by the method according to the invention in a vegetable starting material to be fermented or in a mash for the production of bioethanol, it is feasible to free coproducts occurring in the production of ethanol, namely pomace, i.e. the dried grain residues and undissolved components, or dried vinasse (dried distiller's grains with solubles—DDGS) from fumonisins or mycotoxins, particularly in an oxygen-independent environment.
The invention further aims to provide an additive for the enzymatic degradation of fumonisins, by which it is feasible in a safe and reliable manner to degrade or detoxify such mycotoxins, in an oxygen-independent environment.
To solve these objects, an additive of this type is characterized in that it contains at least one enzyme of the sequences ID Nos. 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23 and 25 as well as optionally, in addition, at least one cosubstrate for at least one or several of the used enzymes, and an inert carrier.
Such an additive which contains at least one enzyme or a complete recombinant host organism for the expression of said enzyme as well as optionally, in addition, at least one cosubstrate for at least one or several of the used enzymes, and an inert carrier, excels by selectively degrading, and hence detoxifying fumonisins. The use of an additive according to the invention, which essentially consists of isolated enzymes as well as, optionally, their cosubstrates and carriers, offers the advantage that the former will keep their catalytic activities in an environment and under conditions in which, for instance, complete microorganisms would not or hardly be active, while, at the same time, allowing for significantly higher specific activities and the catalyzation of defined reactions with the avoidance of undesired side reactions.
In addition, problems caused according the prior art on agricultural raw products by the use of reproducible germs will be safely avoided, and additives merely containing isolated enzymes will, moreover, provide an enhanced formulation aptitude for a selective and controlled activation, i.e., for instance, in a particular site of the digestive tract, as well as the avoidance of an undesired, elevated consumption of substrate. In order to further enhance this specificity, the additive according to the invention is preferably further developed to the effect that enzymes modified by molecular-genetic methods, mutagenesis or molecular evolution are used.
According to a preferred further development, the additive is designed such that an enzyme is used, which comprises at least 90% sequence identity with an enzyme having ID No. 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23 or 25. When using an enzyme which comprises at least 90% sequence identity with an enzymes having ID No. 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23 or 25, it is feasible to safely and reliably degrade in an oxygen-independent manner even further mycotoxins besides the fumonisins to be preferably degraded, thus enabling the extensive detoxification of the fumonisins present, for instance, on vegetable raw products.
By designing the additive in a manner that the enzymes, modified enzymes and/or at least 90% identical enzymes are used sheathed with a protective coating, as in correspondence with a preferred further development of the invention, it will be safeguarded that the enzymes, the at least 90% identical enzymes or the modified enzymes will be secured against any premature loss of activity so as to safely and reliably develop their action in the intended site, for instance in the gastrointestinal tract.
By preferably further developing the additive in a manner that the enzymes are selected from carboxylesterase ID No. 9, tricarballylate dehydrogenase ID No. 11, citrate utilization protein ID No. 13, alcohol dehydrogenase ID No. 17, aminotransferase ID-No. 19 and/or ID No. 25, and/or acetolactate synthase ID No. 23, enzymes qualified for substrate catabolism will be substantially applied so as to ensure, in addition to a reduced amount of enzymes to be applied, that no undesired side reaction will occur when using said enzymes.
According to a preferred further development of the invention, the additive is designed such that it contains a carboxylesterase ID No. 9, an aminotransferase ID No. 19 or ID No. 25, an α-keto acid as a cosubstrate and an inert carrier. By the additive containing a carboxylesterase, an aminotransferase, an α-keto acid as a cosubstrate besides an inert carrier, it is, in particular, feasible to initially hydrolyze fumonisins contained in foods by cleaving tricarballylic acid residues from the fumonisins using carboxylesterase, and to subsequently further react the thus hydrolyzed fumonisin under the action of the aminotransferase and α-keto acid as a cosubstrate, preferably pyruvic acid in the present case, by substituting a keto group for an amino group of the hydrolyzed fumonisin molecule so as to form a 2-keto-hydrolyzed fumonisin, which is totally harmless, for instance, for mammals and can be excreted unchanged, and alanine as a side product, which too does not exert or have any negative effects, for instance, on organisms.
According to a preferred further development of the invention, the additive is further developed such that it contains a carboxylesterase ID No. 9, at least one adsorbent like a clay mineral as well as, optionally, an inert carrier. When using but one carboxylesterase ID No. 9 and at least one adsorbent, the detoxification of the fumonisins may also be performed in a manner that only the tricarballylic acid residues are cleaved and the thus formed, hydrolyzed fumonisin is adsorbed on said adsorbent. By cleaving the tricarballylic acid residues by the aid of carboxylesterase, a substantially long-chain molecule is formed, which can be readily and reliably adsorbed so as to ensure the complete detoxification merely by the selected use of a single enzyme, in particular, by the oxygen-independent degradation of fumonisin and subsequent adsorption.
In that, as in correspondence with a further development of the invention, the additive is used in an oxygen-independent environment during the production of bioethanol, in particular along with a mash or a vegetable starting material, by selecting the additive such that the enzymes contained therein are completely derived from bacteria catalyzing the catabolism of fumonisins via a highly specific degradation path, it is feasible to use the same with high specificity, activity and efficiency so as to enable the additive to be also used technologically in an oxygen-independent environment.
Finally, the present invention relates to the use of genes as represented in the sequences, or of complete recombinant host organisms for the expression of gene sequences having ID Nos. 1, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22 and 24 as well as, optionally, of cosubstrates for producing an additive for the degradation of fumonisins, in the processing or use of vegetable raw materials. An additive produced in this manner allows for the complete and reliable degradation of fumonisins, particularly in an oxygen-independent environment.
In a preferred manner, a cosubstrate selected from the group consisting of a carboxylesterase ID No. 9, an aminotransferase ID No. 19 or ID No. 25, or an α-keto acid, and an inert carrier are used according to the invention, which use allows for the safe and reliable degradation to harmless components of the total of fumonisins in, for instance, vegetable raw materials or starting materials.
A further preferred use is characterized in that a carboxylesterase, at least one adsorbent, in particular clay mineral, as well as, optionally, an inert carrier are used. When using a carboxylesterase and at least one adsorbent, it is feasible to safely and reliably detoxify fumonisins by the mere use of a single enzyme in that the tricarballylic acid side residues are cleaved from the fumonisin by, or by the aid of, said enzyme and the thus formed long-chain hydrolyzed fumonisin is subsequently adsorbed on the adsorbent so as to render the toxin harmless in a safe and reliable manner.
According to a preferred use, the additive according to the invention is used for the oxygen-independent or anaerobic treatment of a vegetable starting material or a mash in the production of bioethanol. In this case, it is feasible to safely and reliably render the mycotoxins contained in the vegetable starting material or raw material harmless during the production of bioethanol in an oxygen-independent environment so as to subsequently allow for the use of the residue from ethanol production, namely the pomace or dried vinasse, either directly or after drying and pelletizing without further processing and, in particular, detoxification as a feed that is free of fumonisins.
In the following, the invention will be explained in more detail by way of exemplary embodiments and Figures. Therein:
The fumD gene (sequence ID No. 8), which encodes a fumonisin carboxylesterase, was cloned and expressed in Pichia pastoris using standard procedures. The his-tagged enzyme was recovered and purified from the supernatant culture solution by affinity chromatography. The enzyme concentration was determined and the enzyme-kinetic parameters were determined with seven different substrate concentrations ranging from 50 μg to 25 mg FB1 per liter and an enzyme concentration of 0.33 ng/ml. The reactions were buffered in 20 mM Tris-Cl buffer (pH 8.0) with 0.1 mg/ml bovine serum albumin and incubated at 30° C. Samples were taken after 0, 30, 60, 120 and 240 minutes of incubation and analyzed by HPLC-MS/MS. Fumonisin B1 (FB1) and hydrolyzed fumonisin B1 were quantified, based on a calibration with the purified reference substances and a completely 13C-labelled internal FB1-standard.
From
Sequences ID Nos. 18 and 24 were cloned using standard procedures and expressed in E. coli under the control of a bacteriophage T7 promoter. The bacterial cells were collected, resuspended in 50 mM sodium phosphate buffer and lyzed under ultrasonic action. Hydrolyzed fumonisin was added, and the samples were incubated at 25° C. Samples were taken at time intervals and analyzed by HPLC-MS/MS. No reduction of the hydrolyzed FB1 concentration was observed. When a cosubstrate such as, for instance, an α-keto acid like e.g. pyruvic acid, or oxalacetate was added to the reaction, the complete degradation of the hydrolyzed fumonisin to 2-keto-HFB1 could be observed as illustrated in
To examine the enzymatic activity of FUM-carboxylesterase in the digestive tract, freshly butchered swine guts were used and transported to the lab under oxygen-exclusion and examined in an anaerobic sterile bench. Approximately 10-cm-long pieces of duodenum and jejunum were secured and cut out. Fumonisin B1, diluted to a final concentration of about 10 ppm in a concentrated aqueous solution, was injected by needles and mixed with intestinal contents. After this, 5 μg fumonisin carboxylesterase in an aqueous solution, or the same volume of water in the negative controls, respectively, was injected and incorporated. The intestinal sections were incubated at 39° C. Samples were drawn by the aid of needles and analyzed by HPLC-MS/MS. It was shown that, at the time of the first sampling after two hours, fumonisin B1 had already been completely hydrolyzed in the duodenum and jejunum.
To determine the temperature range in which fumonisin carboxylesterase is active, 1.6 ng/ml FUM-carboxylesterase in 20 mM Tris-Cl buffer, pH 7.0, was incubated with 0.1 mg/ml BSA and 10 ppm fumonisin B1 at different temperatures. It was shown that the temperature optimum for the enzyme was 30° C. Enzymatic activity was still clearly determined at 40° C. and even 50° C. FUM-carboxylesterase is, thus, suitable for application under the temperature conditions prevailing in the digestive tract, or in the course of process steps in the production of foods and feeds, which take place at elevated temperatures.
To determine the pH range in which fumonisin carboxylesterase is active, Teorell-Stenhagen buffer was used. This buffer can be adjusted over a range of 10 pH units with the same buffer capacity by the combination of citrate, phosphate and borate. FUM-carboxylesterase was incubated in this buffer with 10 ppm fumonisin B1 at different pH values and 25° C., at a concentration of 3.3 ng/ml. The highest activity was shown at pH 8.0, yet activity could be determined in the whole range from pH 5 to pH 10. This activity within this broad pH range has enabled the technological application of the enzyme as a feed additive or in the course of food and feed processing.
The test was performed in a test stable with 12 stalls for 10 animals each. The stable was equipped with a slatted floor, pan troughs and a computer-controlled feeding system. The automats were arranged along the stall walls. Every day, the stable climate was automatically recorded, and the temperature was set according to the standard recommendations for piglet breeding.
For this test, 120 mixed-sex weaned pigs (age: about 4 weeks, average setting weight: 8.21 kg) were used. Each piglet was earmarked and individually weighed. The 120 piglets were randomly distributed among 12 stalls. All piglets came from the Austrian Breeding Program ÖHYB (=(large white×landrace)×Pietrain).
Immediately upon weaning, the piglets were fed with a starter feed for two days, after this settling-in period the changeover to the test feed took place. Feeding was effected in two phases: Weaning phase days 1-14, breeding phase days 15-42. The test feed was mixed individually per stall via the spotmix feeding installation and allotted in dry form twice a day as a function of the number of piglets, weight development and feed consumption. Water was available ad libitum. The 12 stalls were divided into four different application groups at three repetitions each and received the following admixtures in the above-described feed:
Respiratory problems were observed in the positive control with almost half of the animals, even one dropout occurred. All other groups appeared healthy.
Performance Data
Samples of corn mash for the production of bioethanol were taken and incubated at 30 to 65° C. under stirring, the degradation of fumonisin B1 having been investigated after the addition of 770 units of carboxylesterase ID No. 9 per cubic meter of mash under stirring (stirring time in minutes). Samples were inactivated by boiling-up after having been taken and subsequently centrifuged for analysis, and an aliquot of the supernatant was evaporated. The residue was taken up in 200 μl sample buffer containing C13-labelled internal fumonisin standard, shaken for 1.5 min, centrifuged off, and then subjected to LC-MS-analysis. From this results that, as illustrated in
The activity of the fumonisin-degrading enzymes was examined in corn mush samples (corn grits) for the production of corn tortillas and cornflakes, Fumonisin-contaminated corn (about 1 ppm) was ground to corn flour, mixed with water and boiled up. For the production of tortillas, the corn mush cooled to about to 60° C. was supplemented with a mixture of proteinases in alkaline solution. After 30 to 180 min, when the pH had fallen below 9, preferably below 8, a mixture of carboxylesterase and aminotransferase (500-1000 U/m3 each) was added and incubated for further 30 to 60 min. Concerning the production of cornflakes, a corn mush of ground corn and barley malt was boiled up in a pressure vessel for about one hour; after cooling to below 60° C. (preferably 50° C.), an enzymatic mixture comprising carboxylesterase and aminotransferase (500-1000 U/m3 each) was added and incubated for further 30 to 60 min. Samples were then drawn from this mixture and examined for FB1 and HFB1 residues as in Example 7. HFB1 levels were below 80 ppb in all of the samples, the HFB1 formed of FB1 apparently had been continuously further reacted. The measured values for FB1 are indicated in the Table below.
| Number | Date | Country | Kind |
|---|---|---|---|
| GM501/2008 | Sep 2008 | AT | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/AT2009/000364 | 9/18/2009 | WO | 00 | 4/18/2011 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2010/031101 | 3/25/2010 | WO | A |
| Number | Name | Date | Kind |
|---|---|---|---|
| 6538177 | Duvick et al. | Mar 2003 | B1 |
| Number | Date | Country |
|---|---|---|
| 9902703 | Jan 1999 | WO |
| 0004158 | Jan 2000 | WO |
| 0004160 | Jan 2000 | WO |
| 2004085624 | Oct 2004 | WO |
| 2006053357 | May 2006 | WO |
| Entry |
|---|
| D. Hartinger et al., “Heterologous expression of genes from the fumonisin degradation gene cluster of Sphingomonas spp. MTA144 and activity of the catabolic enzymes,” New Biotechnology, Aug. 13, 2009, vol. 25, Supplement 1, pp. S132-S133. |
| S. Heinl et al., “Identification of a fumonisin B1 degrading gene cluster in Sphingomonas spp. MTA144,” New Biotechnology, Aug. 13, 2009, vol. 25, Supplement 1, pp. S61-S62. |
| S. Heinl et al., “Degradation of fumonisin B1 by the consecutive action of two bacterial enzymes,” Journal of Biotechnology, 2010, vol. 145, pp. 120-129. |
| Number | Date | Country | |
|---|---|---|---|
| 20110189755 A1 | Aug 2011 | US |
