TssB is essential for virulence and required for Type VI secretion system in Ralstonia solanacearum

文献类型: 外文期刊

第一作者: Xu, Jingsheng

作者: Xu, Jingsheng;Xu, Jin;Zhang, Hao;He, Liyuan;Feng, Jie

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关键词: Ralstonia solanacearum;Type VI secretion;TssB;Virulence

期刊名称:MICROBIAL PATHOGENESIS ( 影响因子:3.738; 五年影响因子:3.663 )

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收录情况: SCI

摘要: The type VI secretion system (T6SS) is recently discovered machinery in Gram-negative bacteria for translocation of proteins and also is required for full virulence. TssB is a highly conserved protein among the T6SSs, and indispensable for composition and function of T6S. The plant pathogenic bacterium Ralstonia solanacearum also harbours T6SS gene clusters, and a homologue of TssB, hereafter designated as TssB(Rs), but up to date its characterization and function remain unclear. In this study, we showed that TssB(Rs) of R. solanacearum was required for secretion of Hcp, the haemolysin coregulated protein and a hallmark of T6S pathway. Deletion of tssB(Rs) in R. solanacearum GMI1000 strain resulted in defect of biofilm formation, and the expression of the flagella operon is decreased, leading to decreased motility. More importantly, tssB(Rs) mutant strain had significantly attenuated its virulence on tomato plants. TssB is essential for virulence and required for type VI secretion system in R. solanacearum. (C) 2014 Elsevier Ltd. All rights reserved.

分类号: R3

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