IUBMB Enzyme Nomenclature


Accepted name: rhamnogalacturonan endolyase

Reaction: Endotype eliminative cleavage of L-α-rhamnopyranosyl-(1→4)-α-D-galactopyranosyluronic acid bonds of rhamnogalacturonan I domains in ramified hairy regions of pectin leaving L-rhamnopyranose at the reducing end and 4-deoxy-4,5-unsaturated D-galactopyranosyluronic acid at the non-reducing end.

For diagram of reaction click here.

Other name(s): rhamnogalacturonase B; α-L-rhamnopyranosyl-(1→4)-α-D-galactopyranosyluronide lyase; Rgase B; rhamnogalacturonan α-L-rhamnopyranosyl-(1,4)-α-D-galactopyranosyluronide lyase; RG-lyase; YesW; RGL4; Rgl11A; Rgl11Y; RhiE

Systematic name: α-L-rhamnopyranosyl-(1→4)-α-D-galactopyranosyluronate endolyase

Comments: The enzyme is part of the degradation system for rhamnogalacturonan I in Bacillus subtilis strain 168 and Aspergillus aculeatus.

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


1. Mutter, M., Colquhoun, I.J., Schols, H.A., Beldman, G. and Voragen, A.G. Rhamnogalacturonase B from Aspergillus aculeatus is a rhamnogalacturonan α-L-rhamnopyranosyl-(1→4)-α-D-galactopyranosyluronide lyase. Plant Physiol. 110 (1996) 73-77. [PMID: 8587995]

2. Azadi, P., O'Neill, M.A., Bergmann, C., Darvill, A.G. and Albersheim, P. The backbone of the pectic polysaccharide rhamnogalacturonan I is cleaved by an endohydrolase and an endolyase. Glycobiology 5 (1995) 783-789. [PMID: 8720076]

3. Mutter, M., Colquhoun, I.J., Beldman, G., Schols, H.A., Bakx, E.J. and Voragen, A.G. Characterization of recombinant rhamnogalacturonan α-L-rhamnopyranosyl-(1,4)-α-D-galactopyranosyluronide lyase from Aspergillus aculeatus. An enzyme that fragments rhamnogalacturonan I regions of pectin. Plant Physiol. 117 (1998) 141-152. [PMID: 9576783]

4. Kadirvelraj, R., Harris, P., Poulsen, J.C., Kauppinen, S. and Larsen, S. A stepwise optimization of crystals of rhamnogalacturonan lyase from Aspergillus aculeatus. Acta Crystallogr. D Biol. Crystallogr. 58 (2002) 1346-1349. [PMID: 12136151]

5. Laatu, M. and Condemine, G. Rhamnogalacturonate lyase RhiE is secreted by the out system in Erwinia chrysanthemi. J. Bacteriol. 185 (2003) 1642-1649. [PMID: 12591882]

6. Pages, S., Valette, O., Abdou, L., Belaich, A. and Belaich, J.P. A rhamnogalacturonan lyase in the Clostridium cellulolyticum cellulosome. J. Bacteriol. 185 (2003) 4727-4733. [PMID: 12896991]

7. Ochiai, A., Yamasaki, M., Itoh, T., Mikami, B., Hashimoto, W. and Murata, K. Crystallization and preliminary X-ray analysis of the rhamnogalacturonan lyase YesW from Bacillus subtilis strain 168, a member of polysaccharide lyase family 11. Acta Crystallogr. Sect. F Struct. Biol. Cryst. Commun. 62 (2006) 438-440. [PMID: 16682770]

8. Jensen, M.H., Otten, H., Christensen, U., Borchert, T.V., Christensen, L.L., Larsen, S. and Leggio, L.L. Structural and biochemical studies elucidate the mechanism of rhamnogalacturonan lyase from Aspergillus aculeatus. J. Mol. Biol. 404 (2010) 100-111. [PMID: 20851126]

[EC created 2011]

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