淡江大學機構典藏:Item 987654321/77235
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    题名: Molecular Cloning and Characterization of an Insecticidal Toxin from Pseudomonas taiwanensis
    作者: Liu, Je-ruei;Lin, Yung-di;Chang, Shying-tzu;Zeng, Yi-fang;Wang, San-lan
    贡献者: 淡江大學化學學系
    关键词: Molecular cloning;insecticidal toxin;Pseudomonas taiwanensis
    日期: 2010-12
    上传时间: 2012-06-14 09:08:56 (UTC+8)
    出版者: Washington: American Chemical Society
    摘要: An insecticidal toxin gene, tccC, was cloned from the recently discovered novel species Pseudomonas taiwanensis using degenerate PCR and genomic walking. The DNA sequence of the tccC gene (2,940 bp) has an open reading frame encoding 980 amino acids with a calculated molecular weight of 107.93 kDa. The amino acid sequence alignment showed the highest sequence identity (41.2%) with the insecticidal toxin from Pseudomonas entomophila. To examine the insecticidal functionality of the tccC gene product, TccC was heterologously expressed in Escherichia coli as a recombinant His6 fusion protein and purified by immobilized metal ion-affinity chromatography. The recombinant TccC was fed to Drosophila larvae at a concentration of 350 ppm, which induced about 60% mortality within 72 h. The recombinant TccC was stable at pH 7.0 and at 37 °C. When the pH was less than 5.0 or greater than 9.0, or temperature was greater than 55 °C, less than 20% Drosophila larvae mortality was observed. These results prove that Pseudomonas taiwanensis could be used as a source for developing novel biopesticides.
    關聯: Journal of Agricultural and Food Chemistry 58(23), pp.12343-12349
    DOI: 10.1021/jf103604r
    显示于类别:[化學學系暨研究所] 期刊論文

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