IUBMB Enzyme Nomenclature


Accepted name: β-1,4-mannooligosaccharide phosphorylase

Reaction: [(1→4)-β-D-mannosyl]n + phosphate = [(1→4)-β-D-mannosyl]n-1 + α-D-mannose 1-phosphate

Other name(s): RaMP2

Systematic name: 1,4-β-D-mannooligosaccharide::phosphate α-D-mannosyltransferase

Comments: The enzyme, isolated from the ruminal bacterium Ruminococcus albus, catalyses the reversible phosphorolysis of β-1,4-mannooligosaccharide with a minimum size of three monomers.

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


1. Kawahara, R., Saburi, W., Odaka, R., Taguchi, H., Ito, S., Mori, H. and Matsui, H. Metabolic mechanism of mannan in a ruminal bacterium, Ruminococcus albus, involving two mannoside phosphorylases and cellobiose 2-epimerase: discovery of a new carbohydrate phosphorylase, β-1,4-mannooligosaccharide phosphorylase. J. Biol. Chem. 287 (2012) 42389-42399. [PMID: 23093406]

[EC created 2014]

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