Insecticidal polypeptides having broad spectrum activity and uses thereof
The invention provides nucleic acids, and variants and fragments thereof, obtained from strains of Bacillus thuringiensis encoding polypeptides having pesticidal activity against insect pests, including Lepidoptera and Coleoptera. Particular embodiments of the invention provide isolated nucleic acids encoding pesticidal proteins, pesticidal compositions, DNA constructs, and transformed microorganisms and plants comprising a nucleic acid of the embodiments. These compositions find use in methods for controlling pests, especially plant pests.
1. An isolated nucleic acid molecule operably linked to a heterologous regulatory element, wherein the isolated nucleic acid is selected from the group consisting of:
(a) a nucleic acid molecule comprising a nucleotide sequence selected from the group consisting of SEQ ID NO: 1 and SEQ ID NO: 15;
(b) a nucleic acid molecule which encodes a polypeptide comprising an amino acid sequence selected from the group consisting of SEQ ID NO: 2 and SEQ ID NO: 16; and
(c) a nucleic acid molecule encoding a polypeptide comprising an amino acid sequence having at least 95% sequence identity to an amino acid sequence selected from the group consisting of SEQ ID NO: 2 and SEQ ID NO: 16, wherein the polypeptide has insecticidal activity.
2. The isolated nucleic acid molecule of claim 1 , wherein said nucleic acid molecule comprises a synthetic nucleotide sequence having plant preferred codons that has been designed for expression in a plant.
3. A DNA construct comprising: a heterologous regulatory element operably linked to a nucleic acid molecule selected from the group consisting of:
(a) a nucleic acid molecule comprising a nucleotide sequence selected from the group consisting of SEQ ID NO: 1 and SEQ ID NO: 15;
(b) a nucleic acid molecule which encodes a polypeptide comprising an amino acid sequence selected from the group consisting of SEQ ID NO: 2 and SEQ ID NO: 16; and
(c) a nucleic acid molecule encoding a polypeptide comprising an amino acid sequence having at least 95% sequence identity to an amino acid sequence selected from the group consisting of SEQ ID NO: 2 and SEQ ID NO: 16, wherein the polypeptide has insecticidal activity.
4. A host cell comprising the DNA construct of claim 3 .
5. A transgenic plant comprising the DNA construct of claim 3 .
6. A plant seed comprising the DNA construct of claim 3 .
7. An isolated polypeptide operably linked to a heterologous signal peptide, wherein the isolated polypeptide is selected from the group consisting of:
(a) a polypeptide comprising an amino acid sequence selected from the group consisting of SEQ ID NO: 2 and SEQ ID NO: 16; and
(b) a polypeptide having at least 95% sequence identity to a polypeptide sequence selected from the group consisting of SEQ ID NO: 2 and SEQ ID NO: 16, wherein the polypeptide has insecticidal activity, wherein the polypeptide has insecticidal activity.
8. A composition comprising the polypeptide of claim 7 .
9. A method for controlling a Lepidopteran or Coleopteran pest population comprising contacting said population with a pesticidally-effective amount of the polypeptide of claim 7 .
10. A method for killing a Lepidopteran pest comprising contacting said pest with, or feeding to said pest, a pesticidally-effective amount of the polypeptide of claim 7 .
11. A method of producing a transgenic plant or plant cell resistant to a pest, comprising introducing into said plant or plant cell an expression vector comprising a nucleic acid molecule that encodes a pesticidal polypeptide, wherein said nucleic acid molecule is selected from the group consisting of:
(a) a nucleic acid molecule comprising a nucleotide sequence selected from the group consisting of SEQ ID NO: 1 and SEQ ID NO: 15,
(b) a nucleic acid molecule encoding a polypeptide comprising an amino acid sequence selected from the group consisting of SEQ ID NO: 2 and SEQ ID NO: 16; and
(c) a nucleotide sequence encoding a polypeptide comprising an amino acid sequence having at least 95% sequence identity to an amino acid sequence selected from the group consisting of SEQ ID NO: 2 and SEQ ID NO: 16, wherein the polypeptide has insecticidal activity.
12. A method of protecting a plant from a pest, comprising transforming said plant with an expression vector comprising a heterologous regulatory element operably linked to a nucleotide sequence that encodes a pesticidal polypeptide, wherein said nucleotide sequence is selected from the group consisting of:
(a) a nucleic acid molecule comprising a nucleotide sequence selected from the group consisting of SEQ ID NO: 1 and SEQ ID NO: 15;
(b) a nucleic acid molecule which encodes a polypeptide comprising an amino acid sequence selected from the group consisting of SEQ ID NO: 2 and SEQ ID NO: 16; and
(c) a nucleotide sequence encoding a polypeptide comprising an amino acid sequence having at least 95% sequence identity to an amino acid sequence selected from the group consisting of SEQ ID NO: 2 and SEQ ID NO: 16, wherein the polypeptide has insecticidal activity.
13. The method of claim 12 , wherein the pesticidal polypeptide has insecticidal activity against a Lepidopteran pest.