IUBMB Enzyme Nomenclature


Accepted name: 3-O-α-D-mannopyranosyl-α-D-mannopyranose xylosylphosphotransferase

Reaction: UDP-xylose + 3-O-α-D-mannopyranosyl-α-D-mannopyranose = UMP + 3-O-(6-O-α-D-xylosylphospho-α-D-mannopyranosyl)-α-D-mannopyranose

Glossary: O-α-D-xylosylphospho-α-D-mannopyranosyl)-α-D-mannopyranose = O-α-D-xylosylphosphono-α-D-mannopyranosyl)-α-D-mannopyranose

Other name(s): XPT1

Systematic name: UDP-D-xylose:3-O-α-D-mannopyranosyl-α-D-mannopyranose xylosylphosphotransferase

Comments: Mn2+ required for activity. The enzyme is specific for mannose as an acceptor but is flexible as to the structural context of the mannosyl disaccharide.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number:


1. Reilly, M.C., Levery, S.B., Castle, S.A., Klutts, J.S. and Doering, T.L. A novel xylosylphosphotransferase activity discovered in Cryptococcus neoformans. J. Biol. Chem. 284 (2009) 36118-36127. [PMID: 19864415]

[EC created 2011]

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