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The quorum sensing regulator OpaR is a repressor of polar flagellum genes in Vibrio parahaemolyticus
Renfei Lu , Junfang Sun , Yue Qiu , Miaomiao Zhang , Xingfan Xue , Xue Li , Wenhui Yang , Dongsheng Zhou , Lingfei Hu , Yiquan Zhang
J. Microbiol. 2021;59(7):651-657.   Published online June 1, 2021
DOI: https://doi.org/10.1007/s12275-021-0629-3
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  • 26 Web of Science
  • 26 Crossref
AbstractAbstract
Vibrio parahaemolyticus possesses two types of flagella: a single polar flagellum (Pof) for swimming and the peritrichous lateral flagella (Laf) for swarming. Expression of Laf genes has previously been reported to be regulated by the quorum sensing (QS) regulators AphA and OpaR. In the present study, we showed that OpaR, the QS regulator at high cell density (HCD), acted as a negative regulator of swimming motility and the transcription of Pof genes in V. parahaemolyticus. OpaR bound to the promoter-proximal DNA regions of flgAMN, flgMN, and flgBCDEFGHIJ within the Pof gene loci to repress their transcription, whereas it negatively regulates the transcription of flgKL-flaC in an indirect manner. Thus, this work investigated how QS regulated the swimming motility via direct action of its master regulator OpaR on the transcription of Pof genes in V. parahaemolyticus.

Citations

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