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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 한국미생물학회 2021 The journal of microbiology Vol.59 No.7
Vibrio parahaemolyticus possesses two types of flagella: asingle polar flagellum (Pof) for swimming and the peritrichouslateral flagella (Laf) for swarming. Expression of Lafgenes has previously been reported to be regulated by the quorumsensing (QS) regulators AphA and OpaR. In the presentstudy, we showed that OpaR, the QS regulator at high cell density(HCD), acted as a negative regulator of swimming motilityand the transcription of Pof genes in V. parahaemolyticus. OpaR bound to the promoter-proximal DNA regionsof flgAMN, flgMN, and flgBCDEFGHIJ within the Pof geneloci to repress their transcription, whereas it negatively regulatesthe transcription of flgKL-flaC in an indirect manner. Thus, this work investigated how QS regulated the swimmingmotility via direct action of its master regulator OpaR onthe transcription of Pof genes in V. parahaemolyticus.