start-ver=1.4 cd-journal=joma no-vol=56 cd-vols= no-issue=10 article-no= start-page=1051 end-page=1058 dt-received= dt-revised= dt-accepted= dt-pub-year=2016 dt-pub=20160510 dt-online= en-article= kn-article= en-subject= kn-subject= en-title= kn-title=Regulation of Vibrio mimicus metalloprotease (VMP) production by the quorum-sensing master regulatory protein, LuxR en-subtitle= kn-subtitle= en-abstract= kn-abstract= Vibrio mimicus is an estuarine bacterium, while it can cause severe diarrhea, wound infection, and otitis media in humans. This pathogen secretes a relatively important toxin named V. mimicus metalloprotease (VMP). In this study, we clarified regulation of the VMP production according to the quorum-sensing master regulatory protein named LuxR. First, the full length of luxR gene, encoding LuxR, was detected in V. mimicus strain E-37, an environmental isolate. Next, the putative consensus binding sequence of LuxR protein could be detected in the upstream (promoter) region of VMP encoding gene, vmp. Finally, the effect of disruption of luxR gene on the expression of vmp and production of VMP was evaluated. Namely, the expression of vmp was significantly diminished by luxR disruption and the production of VMP was severely altered. Taken together, here we report that VMP production is under the positive regulation of the quorum-sensing master regulatory protein, LuxR. en-copyright= kn-copyright= en-aut-name=Abdel]SattarEl]Shaymaa en-aut-sei=Abdel]Sattar en-aut-mei=El]Shaymaa kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=1 ORCID= en-aut-name=Miyoshi Shin]ichi en-aut-sei=Miyoshi en-aut-mei= Shin]ichi kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=2 ORCID= en-aut-name=ElgamlAbdelaziz en-aut-sei=Elgaml en-aut-mei=Abdelaziz kn-aut-name= kn-aut-sei= kn-aut-mei= aut-affil-num=3 ORCID= affil-num=1 en-affil=Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University kn-affil= affil-num=2 en-affil=Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University kn-affil= affil-num=3 en-affil=Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University kn-affil= en-keyword=LuxR protein kn-keyword=LuxR protein en-keyword=Metalloprotease kn-keyword=Metalloprotease en-keyword=Quorum-sensing kn-keyword=Quorum-sensing en-keyword=Vibrio mimicus kn-keyword=Vibrio mimicus END