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Information on EC 3.2.1.179 - gellan tetrasaccharide unsaturated glucuronosyl hydrolase

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IUBMB Comments
The enzyme releases 4-deoxy-4(5)-unsaturated D-glucuronic acid from oligosaccharides produced by polysaccharide lyases, e.g. the tetrasaccharide beta-D-4-deoxy-Delta4-GlcAp-(1->4)-beta-D-Glcp-(1->4)-alpha-L-Rhap-(1->3)-D-Glcp produced by EC 4.2.2.25, gellan lyase. The enzyme can also hydrolyse unsaturated chondroitin and hyaluronate disaccharides (beta-D-4-deoxy-Delta4-GlcAp-(1->3)-D-GalNAc, beta-D-4-deoxy-Delta4-GlcAp-(1->3)-D-GalNAc6S, beta-D-4-deoxy-Delta4-GlcAp2S-(1->3)-D-GalNAc, beta-D-4-deoxy-Delta4-GlcAp-(1->3)-D-GlcNAc), preferring the unsulfated disaccharides to the sulfated disaccharides.
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The expected taxonomic range for this enzyme is: Bacillus sp. (in: Bacteria)
Synonyms
UGL, unsaturated glucuronyl hydrolase, more
REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
beta-D-4-deoxy-Delta4-GlcAp-(1->4)-beta-D-Glcp-(1->4)-alpha-L-Rhap-(1->3)-D-Glcp + H2O = 5-dehydro-4-deoxy-D-glucuronate + beta-D-Glcp-(1->4)-alpha-L-Rhap-(1->3)-D-Glcp
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