Patent
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, but not limited to, insect pests belonging to the orders Coleoptera and Lepidoptera. Particular embodiments of the invention provide isolated nucleic acids encoding pesticidal proteins, pesticidal compositions, polynucleotide 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. A recombinant nucleic acid molecule encoding a polypeptide having at least 95% sequence identity across the full length of SEQ ID NO: 2 and insecticidal activity against Western corn rootworm ( Diabrotica virgifera virgifera ), wherein the nucleic acid molecule is operably linked to a heterologous regulatory element.
2. The recombinant nucleic acid molecule of claim 1 , wherein the polypeptide comprises the amino acid sequence of SEQ ID NO: 2.
3. The recombinant nucleic acid molecule of claim 1 , wherein the recombinant nucleic acid comprises the nucleic acid sequence of SEQ ID NO: 1.
4. The recombinant nucleic acid molecule of claim 1 , 2 or 3 , further comprising an operably linked nucleotide sequence encoding a maltose binding protein.
5. The recombinant nucleic acid molecule of claim 4 , wherein the nucleic acid molecule encodes a polypeptide comprising the amino acid sequence of SEQ ID NO: 4.
6. The recombinant nucleic acid molecule of claim 1 , 2 or 3 wherein the nucleic acid molecule is operably linked to a heterologous promoter.
7. A DNA construct comprising the recombinant nucleic acid molecule of claim 1 , 2 or 3 .
8. A host cell comprising the DNA construct of claim 7 .
9. A transgenic plant comprising the DNA construct of claim 7 .
10. An isolated polypeptide comprising: a) an amino acid sequence having at least 95% sequence identity across the full length polypeptide of SEQ ID NO: 2, and insecticidal activity against Western corn rootworm ( Diabrotica virgifera virgifera ); and b) a maltose binding protein operably fused to the polypeptide of a).
11. The isolated polypeptide of claim 10 , wherein the polypeptide comprising the amino acid sequence of SEQ ID NO: 2.
12. The isolated polypeptide of claim 10 , wherein polypeptide comprising the amino acid sequence of SEQ ID NO: 4.
13. A method for controlling an insect pest population comprising contacting said population with an insecticidally-effective amount of a polypeptide having at least 95% sequence identity across the full length of SEQ ID NO: 2.
14. A method for killing an insect pest, comprising contacting said pest with, or feeding to said pest, an insecticidally-effective amount of a polypeptide having at least 95% sequence identity across the full length of SEQ ID NO: 2.
15. A plant comprising the recombinant nucleic acid molecule of claim 1 , 2 or 3 operably linked to a heterologous promoter that drives expression in the plant.
16. A method for protecting a plant from a pest, said method comprising introducing into said plant or cell thereof the recombinant nucleic acid molecule of claim 1 , 2 or 3 operably linked to a promoter that drives expression of the coding sequence in a plant cell.