Rapid cloning, identification, and application of one novel crystal protein gene cry30Fa1 from Bacillus thuringiensis

文献类型： 外文期刊

第一作者： Tan, Furong

作者： Tan, Furong;Tang, Xueming;Tan, Furong;Zheng, Aiping;Zhu, Jun;Wang, Lingxia;Li, Shuangcheng;Deng, Qiming;Wang, Shiquan;Li, Ping;Zheng, Aiping;Zhu, Jun;Wang, Lingxia;Li, Shuangcheng;Deng, Qiming;Wang, Shiquan;Li, Ping

作者机构：

关键词： Bacillus thuringiensis;Cry30Fa1;insecticidal activity;Son-PCR;PCR-RFLP

期刊名称：FEMS MICROBIOLOGY LETTERS （ 影响因子：2.742； 五年影响因子：2.856 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： In this study, a fast and efficient strategy has been developed for identifying and isolating novel cry genes from Bacillus thuringiensis by combining the PCR-restriction fragment length polymorphism and the single-oligonucleotide nested-PCR method. Using this method, one novel holotype cry gene, cry30Fa1, encoding a polypeptide of 687 amino acid residues with a molecular mass of 77.1 kDa, 74% identical to Cry30Aa1, was cloned from the B. thuringiensis strain BtMC28. Furthermore, the cry30Fa1 gene was successfully expressed in Escherichia coli BL21 (DE3). The Cry30Fa1 proteins, isolated from the cultures of recombinant E. coli, had remarkable insecticidal effects against Plutella xylostella and Aedes aegypti with LC50 at 6.477 and 15.359 mu g mL-1, respectively. Our results strongly suggest that this strategy is highly efficient and advantageous in terms of rapid cloning of holotype cry genes that have minimal identity to known genes. The cloning of the cry30Fa1 gene would be useful in the resources of the insecticidal crystal genes and may serve as an alternative choice of an insecticide for potential problems associated with insect resistance.

分类号： Q93

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