Dual specificity protein phosphatase TpbA

UniProtKB accession:  Q9HXC7

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UniProtKB description:  Phosphatase that regulates diverse phenotypes in P.aeruginosa via regulation of the concentration of cellular c-di-GMP (By similarity). Acts by dephosphorylating the membrane-anchored diguanylate cyclase TpbB at tyrosine and serine/threonine sites, leading to inactivation of TpbB and reduced c-di-GMP production (By similarity). In vitro shows phosphatase activity toward p-nitrophenyl phosphate (pNPP) and tyrosine phosphopeptides (PubMed:25909591). Can efficiently dephosphorylate two phosphorylated peptides derived from the periplasmic domain of TpbB, with a strong preference for Tyr-48 over Tyr-62 (PubMed:25909591).