Expression of the type VI secretion system 1 component Hcp1 is indirectly repressed by OpaR in Vibrio parahaemolyticus.

Expression of the type VI secretion system 1 component Hcp1 is indirectly repressed by OpaR in Vibrio parahaemolyticus.
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副溶血弧菌中 VI 型分泌系统 1 组分 Hcp1 的表达被 OpaR 间接抑制

DOI:
10.1100/2012/982140
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发表时间:
2012
影响因子:
--
通讯作者:
Zhou D
Zhou D
中科院分区:
其他
文献类型:
--
作者:
Ma L;Zhang Y;Yan X;Guo L;Wang L;Qiu J;Yang R;Zhou D

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VI型分泌系统(T6SS)是一种细菌蛋白注射机制,在毒力、共生、细菌间相互作用、抗发病和环境应激反应中发挥作用。副溶血性弧菌的两条染色体上分别含有T6SS1和T6SS2两个T6SS基因座。本工作揭示了群体感应主调控子Opar抑制了副溶血弧菌中编码T6SS1结构成分Hcp1的hcp1转录,表明QS对T6SS1具有负调控作用。在副溶血弧菌中转录了一个依赖于σ54的启动子,其活性被OPAR调节因子抑制。由于Opar蛋白不能与hcp1的上游区域结合,Opar会间接抑制hcp1的转录。
The type VI secretion system (T6SS) is bacterial protein injection machinery with roles in virulence, symbiosis, interbacterial interaction, antipathogenesis, and environmental stress responses. There are two T6SS loci, T6SS1 and T6SS2, in the two chromosomes of Vibrio parahaemolyticus, respectively. This work disclosed that the master quorum sensing (QS) regulator OpaR repressed the transcription of hcp1 encoding the structural component Hcp1 of T6SS1 in V. parahaemolyticus, indicating that QS had a negative regulatory action on T6SS1. A single σ 54-dependent promoter was transcribed for hcp1 in V. parahaemolyticus, and its activity was repressed by the OpaR regulator. Since the OpaR protein could not bind to the upstream region of hcp1, OpaR would repress the transcription of hcp1 in an indirect manner.
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