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ENZYME entry: EC 2.7.1.204

Accepted Name
protein-N(pi)-phosphohistidine--D-galactose phosphotransferase.
Alternative Name(s)
D-galactose PTS permease.
Reaction catalysed
D-galactose(out) + N(pros)-phospho-L-histidyl-[protein] <=> D-galactose 6-phosphate(in) + L-histidyl-[protein]
Comment(s)
  • This enzyme is a component (known as enzyme II) of a phosphoenolpyruvate (PEP)-dependent, sugar transporting phosphotransferase system (PTS).
  • The system, which is found only in prokaryotes, simultaneously transports its substrate from the periplasm or extracellular space into the cytoplasm and phosphorylates it.
  • The phosphate donor, which is shared among the different systems, is a phospho-carrier protein of low molecular mass that has been phosphorylated by EC 2.7.3.9.
  • Enzyme II, on the other hand, is specific for a particular substrate, although in some cases alternative substrates can be transported with lower efficiency.
  • The reaction involves a successive transfer of the phosphate group to several amino acids within the enzyme before the final transfer to the substrate.
  • Formerly EC 2.7.1.69.
Cross-references
BRENDA2.7.1.204
EC2PDB2.7.1.204
ExplorEnz2.7.1.204
PRIAM enzyme-specific profiles2.7.1.204
KEGG Ligand Database for Enzyme Nomenclature2.7.1.204
IUBMB Enzyme Nomenclature2.7.1.204
IntEnz2.7.1.204
MEDLINEFind literature relating to 2.7.1.204
MetaCyc2.7.1.204
Rhea expert-curated reactions2.7.1.204
UniProtKB/Swiss-Prot
A2RIE6, PTCB_LACLM

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