Solution structure of the active-centre mutant Ile14Ala of the histidine-containing phosphocarrier protein (HPr) from Staphylococcus carnosusSolution structure of the active-centre mutant Ile14Ala of the histidine-containing phosphocarrier protein (HPr) from Staphylococcus carnosus
Structural highlights
1txe is a 1 chain structure with sequence from Staphylococcus carnosus. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
PTHP_STACA General (non sugar-specific) component of the phosphoenolpyruvate-dependent sugar phosphotransferase system (sugar PTS). This major carbohydrate active-transport system catalyzes the phosphorylation of incoming sugar substrates concomitantly with their translocation across the cell membrane. The phosphoryl group from phosphoenolpyruvate (PEP) is transferred to the phosphoryl carrier protein HPr by enzyme I. Phospho-HPr then transfers it to the permease (enzymes II/III). P-Ser-HPr interacts with the catabolite control protein A (CcpA), forming a complex that binds to DNA at the catabolite response elements cre, operator sites preceding a large number of catabolite-regulated genes. Thus, P-Ser-HPr is a corepressor in carbon catabolite repression (CCR), a mechanism that allows bacteria to coordinate and optimize the utilization of available carbon sources. P-Ser-HPr also plays a role in inducer exclusion, in which it probably interacts with several non-PTS permeases and inhibits their transport activity (By similarity).
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
