IUBMB Enzyme Nomenclature


Accepted name: rhamnogalacturonan rhamnohydrolase

Reaction: Exohydrolysis of the α-L-Rha-(1→4)-α-D-GalA bond in rhamnogalacturonan oligosaccharides with initial inversion of configuration releasing β-L-rhamnose from the non-reducing end of rhamnogalacturonan oligosaccharides.

For diagram of reaction click here.

Other name(s): RG-rhamnohydrolase; RG α-L-rhamnopyranohydrolase

Systematic name: rhamnogalacturonan oligosaccharide α-L-Rha-(1→4)-α-D-GalA rhamnohydrolase

Comments: The enzyme is part of the degradation system for rhamnogalacturonan I in Aspergillus aculeatus.

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


1. Pitson, S.M., Mutter, M., van den Broek, L.A., Voragen, A.G. and Beldman, G. Stereochemical course of hydrolysis catalysed by α-L-rhamnosyl and α-D-galacturonosyl hydrolases from Aspergillus aculeatus. Biochem. Biophys. Res. Commun. 242 (1998) 552-559. [PMID: 9464254]

2. Mutter, M., Beldman, G., Schols, H.A. and Voragen, A.G. Rhamnogalacturonan α-L-rhamnopyranohydrolase. A novel enzyme specific for the terminal nonreducing rhamnosyl unit in rhamnogalacturonan regions of pectin. Plant Physiol. 106 (1994) 241-250. [PMID: 7972516]

[EC created 2011]

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