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HPr Serine kinase C-terminal domain
This family represents the C terminal kinase domain of Hpr Serine/threonine kinase PtsK. This kinase is the sensor in a multicomponent phosphorelay system in control of carbon catabolic repression in bacteria [1]. This kinase in unusual in that it recognises the tertiary structure of its target and is a member of a novel family unrelated to any previously described protein phosphorylating enzymes [1]. X-ray analysis of the full-length crystalline enzyme from Staphylococcus xylosus at a resolution of 1.95 A shows the enzyme to consist of two clearly separated domains that are assembled in a hexameric structure resembling a three-bladed propeller [2]. [1]. 9570401. A novel protein kinase that controls carbon catabolite. repression in bacteria.. Reizer J, Hoischen C, Titgemeyer F, Rivolta C, Rabus R, Stulke. J, Karamata D, Saier MH Jr, Hillen W;. Mol Microbiol 1998;27:1157-1169.. [2]. 11904409. Structure of the full-length HPr kinase/phosphatase from. Staphylococcus xylosus at 1.95 A resolution: Mimicking the. product/substrate of the phospho transfer reactions.. Marquez JA, Hasenbein S, Koch B, Fieulaine S, Nessler S, Russell. RB, Hengstenberg W, Scheffzek K;. Proc Natl Acad Sci U S A 2002;99:3458-3463. (from Pfam)
HPr Serine kinase N terminus
This family represents the N-terminal region of Hpr Serine/threonine kinase PtsK. This kinase is the sensor in a multicomponent phospho-relay system in control of carbon catabolic repression in bacteria [1]. This kinase in unusual in that it recognises the tertiary structure of its target and is a member of a novel family unrelated to any previously described protein phosphorylating enzymes [1]. X-ray analysis of the full-length crystalline enzyme from Staphylococcus xylosus at a resolution of 1.95 A shows the enzyme to consist of two clearly separated domains that are assembled in a hexameric structure resembling a three-bladed propeller. The blades are formed by two N-terminal domains each, and the compact central hub assembles the C-terminal kinase domains [2]. [1]. 9570401. A novel protein kinase that controls carbon catabolite. repression in bacteria.. Reizer J, Hoischen C, Titgemeyer F, Rivolta C, Rabus R, Stulke. J, Karamata D, Saier MH Jr, Hillen W;. Mol Microbiol 1998;27:1157-1169.. [2]. 11904409. Structure of the full-length HPr kinase/phosphatase from. Staphylococcus xylosus at 1.95 A resolution: Mimicking the. product/substrate of the phospho transfer reactions.. Marquez JA, Hasenbein S, Koch B, Fieulaine S, Nessler S, Russell. RB, Hengstenberg W, Scheffzek K;. Proc Natl Acad Sci U S A 2002;99:3458-3463. (from Pfam)
HPr kinase/phosphorylase
HPr kinase/phosphorylase catalyzes the ATP- as well as the pyrophosphate-dependent phosphorylation of 'Ser-46' in HPr, a phosphocarrier protein of the phosphoenolpyruvate-dependent sugar phosphotransferase system (PTS); also catalyzes the pyrophosphate-producing, inorganic phosphate-dependent dephosphorylation (phosphorolysis) of seryl-phosphorylated HPr (P-Ser-HPr)
HPr(Ser) kinase/phosphatase
Members of this family are the bifunctional enzyme, HPr kinase/phosphatase. All members of the seed alignment (n=57) have a gene tightly clustered with a gene for the phospocarrier protein HPr, its target.
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