Reaction: GDP-mannose + 3-phospho-D-glycerate = GDP + 2-(α-D-mannosyl)-3-phosphoglycerate
Other name(s): MPG synthase; GDP-mannose:3-phosphoglycerate 3-α-D-mannosyltransferase
Systematic name: GDP-mannose:3-phospho-D-glycerate 3-α-D-mannosyltransferase
Comments: Requires Mg2+. The enzyme is absolutely specific for GDPmannose and 3-phosphoglycerate, and transfers the mannosyl group with retention of configuration. In the hyperthermophilic archaeon Pyrococcus horikoshii, the mannosyl-3-phosphoglycerate formed is subsequently dephosphorylated by a specific phosphatase, EC 126.96.36.199 (mannosyl-3-phosphoglycerate phosphatase), producing mannosylglycerate.
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 393512-63-5
1. Empadinhas, N., Marugg, J.D., Borges, N., Santos, H. and da Costa, M.S. Pathway for the synthesis of mannosylglycerate in the hyperthermophilic archaeon Pyrococcus horikoshii. Biochemical and genetic characterization of key-enzymes. J. Biol. Chem. 276 (2001) 43580-43588. [PMID: 11562374]