Claims
- 1. A method for producing a nucleic acid coding sequence of a gene selected for optimized expression in a plant, said method comprising:
- (a) determing an amino acid sequence encoded by said gene selected for optimized expression;
- (b) reverse translating said amino acid sequence into a maize-optimized nucleic acid coding sequence, wherein said maize-optimized nucleic acid coding sequence comprises a sufficient number of the single codons that most frequently encode each amino acid in maize, wherein said maize-optimized nucleic acid coding sequence has at least about 60% G+C content, and wherein the single codons that most frequently encode each amino acid in maize are determinable by (i) pooling a plurality of gene sequences from maize, (ii) calculating a codon usage profile from said pooled maize gene sequences, and (iii) determining which single codon most frequently encodes each amino acid, in maize; and
- (c) synthesizing said maize-optimized nucleic acid coding sequence.
- 2. A method according to claim 1, wherein the single codons determined frequently encode each amino acid in maize are the following: Ala, GCC; Arg, CGC; Asn, AAC; Asp, GAC; Cys, TGC; Gln, CAG; Glu, GAG; Gly, GGC; His, CAC; Ile, ATC; Leu, CTG; Lys, AAG; Met, ATG; Phe, TTC; Pro, CCC; Ser, AGC; Thr, ACC; Trp, TGG; Tyr, TAC; and Val, GTG.
- 3. A method according to claim 1, wherein said gene selected for optimized expression is an insecticidal protein gene.
- 4. A method according to claim 3, wherein said insecticidal protein gene is a Bacillus thuringiensis protein gene.
- 5. A method according to claim 4, wherein said Bacillus thuringiensis protein gene is a cryIA(b) gene.
- 6. A method according to claim 4, wherein said Bacillus thuringiensis protein gene is a cryIB gene.
- 7. A method for producing a nucleic acid coding sequence of a gene selected for optimized expression in a plant said method compnrising:
- (a) determining an amino acid sequence encoded by said gene selected for optimized expression;
- (b) reverse translating said amino acid sequence into a maize-optimized nucleic acid coding sequence, wherein said maize-optimized nucleic acid coding sequence comprises a sufficient number of the following codons whereby said maize-optimized nucleic acid coding sequence has at least about 60% G+C content: Ala, GCC; Arg, CGC; Asn, AAC; Asp, GAC; Cys, TGC; Gln, CAG; Glu, GAG; Gly, GGC; His, CAC; Ile, ATC; Leu, CTG; Lys, AAG; Met, ATG; Phe, TTC; Pro, CCC; Ser, AGC; Thr, ACC; Trp, TGG; Tyr, TAC; and Val, GTG; and
- (c) synthesizing said maize-optimized nucleic acid coding sequence.
- 8. A method according to claim 7, wherein said gene selected for optimized expression is an insecticidal protein gene.
- 9. A method according to claim 8, wherein said insecticidal protein gene is a Bacillus thuringiensis protein gene.
- 10. A method according to claim 9, wherein said Bacillus thuringiensis protein gene is a cryIA(b) gene.
- 11. A method according to claim 9, wherein said Bacillus thuringiensis protein gene is a cryIB gene.
- 12. A method for producing a synthetic DNA coding sequence of a gene selected for optimized expression in a plant, said method comprising:
- (a) reverse-translating the amino acid sequence encoded by said gene selected for optimized expression into a synthetic DNA coding sequence comprising a sufficient number of the single codons that most frequently encode each amino acid in maize, wherein said synthetic DNA coding sequence has at least about 60% G+C content, and wherein the single codons that most frequently encode each amino acid in maize are determinable by
- (i) pooling a plurality of gene sequences from maize,
- (ii) calculating a codon usage profile from said pooled maize gene sequences, and
- (iii) determining which single codon most frequently encodes each amino acid in maize; and
- (b) synthesizing said DNA coding sequence.
- 13. A method according to claim 12, wherein the single codons determined to most frequently encode each amino acid in maize are the following: Ala, GCC; Arg, CGC; Asn, AAC; Asp, GAC; Cys, TGC; Gln, CAG; Glu, GAG; Gly, GGC; His, CAC; Ile, ATC; Leu, CTG; Lys, AAG; Met, ATG; Phe, TTC; Pro, CCC; Ser, AGC; Thr, ACC; Trp, TGG; Tyr, TAC; and Val, GTG.
- 14. A method according to claim 12, wherein said gene selected for optimized expression is an insecticidal protein gene.
- 15. A method according to claim 14, wherein said insecticidal protein gene is a Bacillus thuringiensis protein gene.
- 16. A method according to claim 15, wherein said Bacilliis thuringiensis protein gene is a cryIA(b) gene.
- 17. A method according to claim 15, wherein said Bacillus thuringiensis protein gene is a cryIB gene.
Parent Case Info
This is a divisional application of Ser. No. 07/951,715, filed Sep. 25, 1992, now U.S. Pat. No. 5,625,136, issued Apr. 29, 1997, which is a continuation-in-part of Ser. No. 07/772,027, filed Oct. 4, 1991, now abandoned.
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Divisions (1)
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Date |
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Parent |
951715 |
Sep 1992 |
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Continuation in Parts (1)
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772027 |
Oct 1991 |
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