cAMP-activated global transcriptional regulator Vfr

UniProtKB accession:  P55222

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UniProtKB description:  Global cAMP-dependent transcriptional regulator that controls virulence gene expression by distinct cAMP-dependent and -independent mechanisms, which allow to fine tune its virulence program in response to specific host cues or environments (PubMed:20494996). Controls the expression of many regulatory targets including type II, type III and type IV secretion systems, flagellar-mediated motility, and quorum sensing systems (PubMed:12057955, PubMed:26929300, PubMed:30761117, PubMed:9190808). Transcriptional control is exerted by binding to a well-characterized consensus site (5'-ANWWTGNGAWNYAGWTCACAT) within target promoters (PubMed:17159200, PubMed:20494996, PubMed:26929300). Directly binds to the toxA upstream region to regulate exotoxin A production, to the lasR gene promoter to activate the las quorum-sensing system or to the exsA promoter to regulate type III secretion system (PubMed:12057955, PubMed:19389782, PubMed:9190808). Autoregulates as well its own expression (PubMed:20494996).