The Enzyme Database

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EC 4.2.2.25     
Accepted name: gellan lyase
Reaction: Eliminative cleavage of β-D-glucopyranosyl-(1→4)-β-D-glucopyranosyluronate bonds of gellan backbone releasing tetrasaccharides containing a 4-deoxy-4,5-unsaturated D-glucopyranosyluronic acid at the non-reducing end. The tetrasaccharide produced from deacetylated gellan is β-D-4-deoxy-Δ4-GlcAp-(1→4)-β-D-Glcp-(1→4)-α-L-Rhap-(1→3)-β-D-Glcp.
Systematic name: gellan β-D-glucopyranosyl-(1→4)-D-glucopyranosyluronate lyase
Comments: The enzyme is highly specific to gellan, especially deacetylated gellan.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
References:
1.  Hashimoto, W., Maesaka, K., Sato, N., Kimura, S., Yamamoto, K., Kumagai, H. and Murata, K. Microbial system for polysaccharide depolymerization: enzymatic route for gellan depolymerization by Bacillus sp. GL1. Arch. Biochem. Biophys. 339 (1997) 17–23. [PMID: 9056228]
2.  Hashimoto, W., Sato, N., Kimura, S. and Murata, K. Polysaccharide lyase: molecular cloning of gellan lyase gene and formation of the lyase from a huge precursor protein in Bacillus sp. GL1. Arch. Biochem. Biophys. 354 (1998) 31–39. [PMID: 9633595]
3.  Miyake, O., Kobayashi, E., Nankai, H., Hashimoto, W., Mikami, B. and Murata, K. Posttranslational processing of polysaccharide lyase: maturation route for gellan lyase in Bacillus sp. GL1. Arch. Biochem. Biophys. 422 (2004) 211–220. [PMID: 14759609]
[EC 4.2.2.25 created 2011]
 
 


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