| EC |
3.2.1.172 |
| Accepted name: |
unsaturated rhamnogalacturonyl hydrolase |
| Reaction: |
2-O-(4-deoxy-β-L-threo-hex-4-enopyranuronosyl)-α-L-rhamnopyranose + H2O = 5-dehydro-4-deoxy-D-glucuronate + L-rhamnopyranose |
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For diagram of ramnosylgalacturan degradation, click here |
| Glossary: |
6-deoxy-2-O-(4-deoxy-β-L-threo-hex-4-enopyranuronosyl)-α-L-mannopyranose = 2-O-(4-deoxy-β-L-threo-hex-4-enopyranuronosyl)-α-L-rhamnopyranose
5-dehydro-4-deoxy-D-glucuronate = (4S,5R)-4,5-dihydroxy-2,6-dioxohexanoate
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| Other name(s): |
YteR; YesR |
| Systematic name: |
2-O-(4-deoxy-β-L-threo-hex-4-enopyranuronosyl)-α-L-rhamnopyranose hydrolase |
| Comments: |
The enzyme is part of the degradation system for rhamnogalacturonan I in Bacillus subtilis strain 168. |
| Links to other databases: |
BRENDA, EXPASY, KEGG, MetaCyc, PDB |
| References: |
| 1. |
Itoh, T., Ochiai, A., Mikami, B., Hashimoto, W. and Murata, K. A novel glycoside hydrolase family 105: the structure of family 105 unsaturated rhamnogalacturonyl hydrolase complexed with a disaccharide in comparison with family 88 enzyme complexed with the disaccharide. J. Mol. Biol. 360 (2006) 573–585. [DOI] [PMID: 16781735] |
| 2. |
Zhang, R., Minh, T., Lezondra, L., Korolev, S., Moy, S.F., Collart, F. and Joachimiak, A. 1.6 Å crystal structure of YteR protein from Bacillus subtilis, a predicted lyase. Proteins 60 (2005) 561–565. [DOI] [PMID: 15906318] |
| 3. |
Itoh, T., Ochiai, A., Mikami, B., Hashimoto, W. and Murata, K. Structure of unsaturated rhamnogalacturonyl hydrolase complexed with substrate. Biochem. Biophys. Res. Commun. 347 (2006) 1021–1029. [DOI] [PMID: 16870154] |
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| [EC 3.2.1.172 created 2011, modified 2012] |
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| EC |
4.2.2.24 |
| Accepted name: |
rhamnogalacturonan exolyase |
| Reaction: |
Exotype eliminative cleavage of α-L-rhamnopyranosyl-(1→4)-α-D-galactopyranosyluronic acid bonds of rhamnogalacturonan I oligosaccharides containing α-L-rhamnopyranose at the reducing end and 4-deoxy-4,5-unsaturated D-galactopyranosyluronic acid at the non-reducing end. The products are the disaccharide 2-O-(4-deoxy-β-L-threo-hex-4-enopyranuronosyl)-α-L-rhamnopyranose and the shortened rhamnogalacturonan oligosaccharide containing one 4-deoxy-4,5-unsaturated D-galactopyranosyluronic acid at the non-reducing end. |
|
For diagram of ramnosylgalacturan degradation, click here |
| Glossary: |
6-deoxy-2-O-(4-deoxy-β-L-threo-hex-4-enopyranuronosyl)-α-L-mannopyranose = 2-O-(4-deoxy-β-L-threo-hex-4-enopyranuronosyl)-α-L-rhamnopyranose |
| Other name(s): |
YesX |
| Systematic name: |
α-L-rhamnopyranosyl-(1→4)-α-D-galactopyranosyluronate exolyase |
| Comments: |
The enzyme is part of the degradation system for rhamnogalacturonan I in Bacillus subtilis strain 168. |
| Links to other databases: |
BRENDA, EXPASY, KEGG, MetaCyc, PDB |
| References: |
| 1. |
Ochiai, A., Itoh, T., Mikami, B., Hashimoto, W. and Murata, K. Structural determinants responsible for substrate recognition and mode of action in family 11 polysaccharide lyases. J. Biol. Chem. 284 (2009) 10181–10189. [DOI] [PMID: 19193638] |
| 2. |
Ochiai, A., Itoh, T., Kawamata, A., Hashimoto, W. and Murata, K. Plant cell wall degradation by saprophytic Bacillus subtilis strains: gene clusters responsible for rhamnogalacturonan depolymerization. Appl. Environ. Microbiol. 73 (2007) 3803–3813. [DOI] [PMID: 17449691] |
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| [EC 4.2.2.24 created 2011] |
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