Characterization of cry9Da4, cry9Eb2, and cry9Ee1 genes from Bacillus thuringiensis strain T03B001

Appl Microbiol Biotechnol. 2013 Nov;97(22):9705-13. doi: 10.1007/s00253-013-4781-5. Epub 2013 Mar 2.

Abstract

Three cry9 genes, cry9Da4, cry9Eb2, and cry9Ee1, were cloned from Bacillus thuringiensis strain T03B001 using a high-resolution melting analysis method. All three cry9 genes were overexpressed in Escherichia coli Rosetta (DE3), and the expressed products Cry9Eb2 and Cry9Ee1 were shown to be toxic to Plutella xylostella and Ostrinia furnacalis, but not to Helicoverpa armigera or Colaphellus bowringi. The bioassay of Cry9Eb2 and Cry9Ee1 against Cry1Ac-resistant P. xylostella strains indicated that both novel Cry9 toxins exhibited no cross-resistance with Cry1Ac. Cry9Eb2 and Cry9Ee1 can be applied not only for P. xylostella and O. furnacalis control, but also for the Cry1Ac-resistance management of pests.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Bacillus thuringiensis / genetics*
  • Bacillus thuringiensis Toxins
  • Bacterial Proteins / genetics*
  • Bacterial Proteins / metabolism*
  • Biological Assay
  • Cloning, Molecular
  • Endotoxins / genetics*
  • Endotoxins / metabolism*
  • Escherichia coli / genetics
  • Gene Expression
  • Hemolysin Proteins / genetics*
  • Hemolysin Proteins / metabolism*
  • Insecta / drug effects*
  • Recombinant Proteins / genetics
  • Recombinant Proteins / metabolism
  • Survival Analysis

Substances

  • Bacillus thuringiensis Toxins
  • Bacterial Proteins
  • Endotoxins
  • Hemolysin Proteins
  • Recombinant Proteins
  • insecticidal crystal protein, Bacillus Thuringiensis