Insecticidal proteins and methods for their use
Compositions and methods for controlling pests are provided. The methods involve transforming organisms with a nucleic acid sequence encoding an insecticidal protein. In particular, the nucleic acid sequences are useful for preparing plants and microorganisms that possess insecticidal activity. Thus, transformed bacteria, plants, plant cells, plant tissues and seeds are provided. Compositions are insecticidal nucleic acids and proteins of bacterial species. The sequences find use in the construction of expression vectors for subsequent transformation into organisms of interest including plants, as probes for the isolation of other homologous (or partially homologous) genes. The pesticidal proteins find use in controlling, inhibiting growth or killing Lepidopteran, Coleopteran, Dipteran, fungal, Hemipteran and nematode pest populations and for producing compositions with insecticidal activity.
1. A recombinant insecticidal polypeptide having at least 80% sequence identity to the amino acid sequence of SEQ ID NO: 6 or a fragment thereof having insecticidal activity, wherein the insecticidal polypeptide or fragment thereof is joined to a heterologous signal sequence, a transit sequence, or a histidine tag, or fused to a protein of interest either directly or through a linker segment.
2. The recombinant insecticidal polypeptide of claim 1 , wherein the fragment comprises amino acids 1-315, amino acids 1-330, amino acids 1-349, amino acids 1-450, amino acids 25-315, amino acids 25-330, amino acids 25-349, amino acids 25-450 or amino acids 25-483 of SEQ ID NO: 6.
3. The recombinant insecticidal polypeptide of claim 2 , wherein the polypeptide comprises amino acids 25-483 of SEQ ID NO: 6.
4. A composition comprising at least one recombinant insecticidal polypeptide of claim 1 .
5. A DNA construct comprising a recombinant polynucleotide encoding an insecticidal polypeptide having at least 80% sequence identity to the amino acid sequence of SEQ ID NO:6, wherein the polynucleotide is operably linked to a heterologous regulatory element.
6. The DNA construct of claim 5 , wherein the polynucleotide has codons optimized for expression in an agriculturally important crop.
7. A transgenic plant comprising the DNA construct of claim 5 .
8. A method of inhibiting growth or killing an insect pest or pest population, said method comprising contacting the insect pest with the insecticidal polypeptide of claim 1 .
9. The method of claim 8 , wherein the insect pest or pest population is resistant to at least one Cry insecticidal protein.
10. A transformed prokaryotic cell comprising the DNA construct of claim 5 .
11. The recombinant insecticidal polypeptide of claim 1 , wherein the structure of the insecticidal polypeptide comprises: a) a N-terminal MACPF domain; and b) a C-terminal β-prism domain.
12. The recombinant insecticidal polypeptide of claim 1 , wherein the insecticidal polypeptide is labeled with a detectable label.