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EC 4.2.2.25 Details
EC number
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
Comment
The enzyme is highly specific to gellan, especially deacetylated gellan.
History
created 2011
EC Tree
1.6.2.1 created 1961, deleted 1965
1.6.2.3 created 1972, deleted 1965
1.13.11.7 created 1965 as EC 1.13.1.7, transferred 1972 to EC 1.13.11.7, deleted 1980
1.13.11.21 created 1972, deleted 2001