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- Title
Identification of a mosquitocidal toxin from Bacillus thuringiensis using mass spectrometry.
- Authors
Zhang, Wenfei; Zhang, Jie; Crickmore, Neil; Wu, Zhongqi; Yang, Yiran; Qian, Jiangzhao; Wu, Hongping; Wang, Ruiping; Fang, Xuanjun
- Abstract
The Bacillus thuringiensis strain S2160-1 has previously been identified as being highly toxic to mosquito larvae and a viable alternative to strains currently used commercially to control these insects. A PCR approach had identified the presence of four putative insecticidal toxin genes ( cry30Ea, cry30 Ga, cry50Ba and cry54Ba) in this strain, but did not identify the genes that encoding three of the main crystal toxin proteins of size 140 and 130 and 30 kDa. In this study we used mass spectrometry to identify the 130 kDa toxin as a rare Cry4 toxin (Cry4Cb3). The gene encoding this toxin was cloned and expressed and the toxin shown to have mosquitocidal activity against Culex quinquefasciatus.
- Subjects
BACILLUS thuringiensis toxins; MASS spectrometry; GENE expression in bacteria; POLYMERASE chain reaction; CULEX quinquefasciatus
- Publication
World Journal of Microbiology & Biotechnology, 2014, Vol 30, Issue 12, p3273
- ISSN
0959-3993
- Publication type
Article
- DOI
10.1007/s11274-014-1744-7