IUBMB Enzyme Nomenclature


Accepted name: β-D-galactosyl-(1→4)-L-rhamnose phosphorylase

Reaction: β-D-galactosyl-(1→4)-L-rhamnose + phosphate = L-rhamnose + α-D-galactose 1-phosphate

Other name(s): D-galactosyl-β1→4-L-rhamnose phosphorylase; GalRhaP

Systematic name: β-D-galactosyl-(1→4)-L-rhamnose:phosphate 1-α-D-galactosyltransferase

Comments: The enzyme from Clostridium phytofermentans is also active towards towards β-D-galactosyl derivatives of L-mannose, L-lyxose, D-glucose, 2-deoxy-D-glucose, and D-galactose in this order. Differs from 1,3-β-galactosyl-N-acetylhexosamine phosphorylase (EC in being active towards L-rhamnose and inactive towards N-acetyl hexosamine derivatives.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number: 1236189-79-9


1. Nakajima, M., Nishimoto, M. and Kitaoka, M. Characterization of three β-galactoside phosphorylases from Clostridium phytofermentans: discovery of D-galactosyl-β1→4-L-rhamnose phosphorylase. J. Biol. Chem. 284 (2009) 19220-19227. [PMID: 19491100]

[EC created 2009]

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