Histidine phosphocarrier protein, mol. model

Molecular model (ribbon diagram, no labels) of histidine phosphocarrier protein HPR (pdb code: 1pch),a component of the phosphoenolpyruvate- dependent sugar phosphotransferase system (PTS), a major carbohydrate active-transport system that transports of certain hexoses across the cytoplasmic membrane of bacteria and mycoplasmas. The imidazole group on His-15 (shown as a ball- and-stick model) at the active site of HPR accepts a multi-enzyme system (Enzyme I) and transfers it to various sugar- specific PTS permeases.