SecG is required for antibiotic activities of Pseudomonas sp YL23 against Erwinia amylovora and Dickeya chrysanthemi

文献类型： 外文期刊

第一作者： Liu, Youzhou

作者： Liu, Youzhou;Qiao, Junqing;Du, Yan;Liu, Youzhou;Baird, Sonya M.;Lu, Shi-En

作者机构：

关键词： Pseudomonas sp;Antibacterial;Erwinia amylovora;Dickeya chrysanthemi;secG

期刊名称：JOURNAL OF BASIC MICROBIOLOGY （ 影响因子：2.281； 五年影响因子：2.516 ）

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收录情况： SCI

摘要： Strain YL23 was isolated from soybean root tips and identified to be Pseudomonas sp. This strain showed broad-spectrum antibacterial activity against bacterial pathogens that are economically important in agriculture. To characterize the genes dedicated to antibacterial activities against microbial phytopathogens, a Tn5-mutation library of YL23 was constructed. Plate bioassays revealed that the mutant YL23-93 lost its antibacterial activities against Erwinia amylovora and Dickeya chrysanthemi as compared with its wild type strain. Genetic and sequencing analyses localized the transposon in a homolog of the secG gene in the mutant YL23-93. Constitutive expression plasmid pUCP26-secG was constructed and electroporated into the mutant YL23-93. Introduction of the plasmid pUCP26-secG restored antibacterial activities of the mutant YL23-93 to E. amylovora and D. chrysanthemi. As expected, empty plasmid pUCP26 could not complement the phenotype of the antibacterial activity in the mutant. Thus the secG gene, belonging to the Sec protein translocation system, is required for antibacterial activity of strain YL23 against E. amylovora and D. chrysanthemi.

分类号： R37

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