Claims
- 1. A synthetic DNA coding sequence that encodes a Bacillus thuringiensis (Bt) insecticidal protein selected for optimized expression in a plant, wherein said synthetic DNA coding sequence is produced by a method comprising:(a) obtaining the amino acid sequence of said Bt insecticidal protein; (b) reverse-translating said amino acid sequence 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 (c) synthesizing said DNA coding sequence.
- 2. A synthetic DNA coding sequence according to claim 1, wherein said Bacillus thuringiensis insecticidal protein is CryIA(b).
- 3. A synthetic DNA coding sequence according to claim 1, wherein said Bacillus thuringiensis insecticidal protein is CryIB.
- 4. A chimeric gene comprising a heterologous promoter sequence operatively linked to the nucleic acid molecule of claim 1.
- 5. A recombinant vector comprising the chimeric gene of claim 4.
- 6. A transgenic plant cell comprising the chimeric gene of claim 4.
- 7. A transgenic plant comprising the transgenic plant cell of claim 6.
- 8. A transgenic plant according to claim 7 which is maize.
- 9. Transgenic seed from the transgenic plant according to claim 7, wherein said transgenic seed comprises the synthetic DNA coding sequence that encodes a Bacillus thuringiensis (Bt) insecticidal protein.
- 10. A method of controlling insect pests, comprising contacting the insect pests with the transgenic plant according to claim 7.
- 11. The method of claim 10, wherein the insect pests are lepidopteran insect pests.
- 12. The method of claim 11, wherein the insect pests are European corn borers.
- 13. The method of claim 10, wherein said transgenic plant is maize.
- 14. A method of producing an insect-resistant plant, comprising introducing a synthetic DNA coding sequence according to claim 1 into said plant, wherein said synthetic DNA coding sequence is expressible in said plant in an effective amount to control insect pests.
- 15. The method of claim 14, wherein the insect pests are lepidopteran insect pests.
- 16. The method of claim 15, wherein the insect pests are European corn borers.
- 17. The method of claim 14, wherein said plant is maize.
- 18. A synthetic DNA coding sequence that encodes a Bacillus thuringiensis (Bt) insecticidal protein selected for optimized expression in a plant, wherein said synthetic DNA coding sequence is produced by a method comprising:(a) obtaining the amino acid sequence of said Bt insecticidal protein; (b) reverse-translating said amino acid sequence into a synthetic DNA coding sequence comprising a sufficient number of the following codons: Ala, GCC; Arg, CGC; Asn, AAC; Asp, GAC; Cys, TGC; Gln, CAGl Glu, GAG; Gly, GGC; His, CAC; Ilc, ATC; Leu, CTG; Lys, AAG; Met, ATG; Phe, TTC; Pro, CCC; Ser, AGC; Thr, ACC; Trp, TGG; Tyr, TAC; and Val, GTG; such that said synthetic DNA coding sequence has at least about 60% G+C content; and (c) synthesizing said DNA coding sequence.
- 19. A synthetic DNA coding sequence according to claim 18, wherein said Bacillus thuringiensis insecticidal protein is CryIA(b).
- 20. A synthetic DNA coding sequence according to claim 18, wherein said Bacillus thuringiensis insecticidal protein is CryLB.
- 21. A chimeric gene comprising a heterologous promoter sequence operatively linked to the synthetic DNA coding sequence of claim 18.
- 22. A recombinant vector comprising the chimeric gene of claim 21.
- 23. A transgenic plant cell comprising the chimeric gene of claim 21.
- 24. A transgenic plant comprising the transgenic plant cell of claim 23.
- 25. A transgenic plant according to claim 24, which is maize.
- 26. Transgenic seed from the transgenic plant according to claim 25, wherein said transgenic seed comprises the synthetic DNA coding that encodes a Bacillus thuringiensis (Bt) insecticidal protein.
- 27. A method of controlling insect pests, comprising contacting the insect pests with the transgenic plant according to claim 24.
- 28. The method of claim 27, wherein the insect pests are lepidopteran insect pests.
- 29. The method of claim 28, wherein the insect pests are European corn borers.
- 30. The method of claim 27, wherien said transgenic plant is maize.
- 31. A method of producing an insect-resistant plant, comprising introducing a synthethic DNA coding sequence according to claim 18 into said plant, wherein said synthetic DNA coding sequence is expressible in said plant in an effective amount to control insect pests.
- 32. The method of claim 31, wherein the insect pests are lepidoteran insect pests.
- 33. The method of claim 32, wherein the insect pests are European corn borers.
- 34. The method of claim 31, wherein said plant is maize.
Parent Case Info
This is a continuation of U.S. application Ser. No. 08/459,504, filed Jun. 2, 1995, now U.S. Pat. No. 6,075,185, which is a division of U.S. application Ser. No. 07/951,715, filed Sep. 25, 1992, now U.S. Pat. No. 5,625,136, which is a continuation-in-part of U.S. application Ser. No. 07/772,027, filed Oct. 4, 1991, now abandoned, which disclosure is herein incorporated in its entirety.
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Continuations (1)
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Number |
Date |
Country |
Parent |
08/459504 |
Jun 1995 |
US |
Child |
09/547422 |
|
US |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
07/772027 |
Oct 1991 |
US |
Child |
07/951715 |
|
US |