Negative regulator YfiR

UniProtKB accession:  Q9I4L4

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UniProtKB description:  Negatively regulates the activity of the diguanylate cyclase TpbB/YfiN, leading to decreased c-di-GMP production (PubMed:20300602). Inhibits TpbB/YfiN allosterically, through a hydrophobic interaction between the C-terminus of YfiR and a conserved region of the periplasmic PAS domain of TpbB/YfiN (PubMed:22719254). Under reducing conditions, may also act as an YfiB-independent sensing device that is able to activate TpbB/YfiN in response to the redox status of the periplasm (PubMed:22719254).