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Catalysis of the reaction: Produces alpha-D-fructofuranose beta-D-fructofuranose 1,2':2,3'-dianhydride (DFA III) by successively eliminating the diminishing (2->1)-beta-D-fructan (inulin) chain from the terminal D-fructosyl-D-fructosyl disaccharide. Catalysis of the reaction: Eliminative cleavage of dermatan sulfate containing 1,4-beta-D-hexosaminyl and 1,3-beta-D-glucurosonyl or 1,3-alpha-L-iduronosyl linkages to disaccharides containing 4-deoxy-beta-D-gluc-4-enuronosyl groups to yield a 4,5-unsaturated dermatan-sulfate disaccharide (DeltaUA-GalNAC-4S). Catalysis of the reaction: Produces di-beta-D-fructofuranose 2,6':2',6-dianhydride (DFA IV) by successively eliminating the diminishing (2->6)-beta-D-fructan (levan) chain from the terminal D-fructosyl-D-fructosyl disaccharide. Catalysis of the breakage of a carbon-oxygen bond. Catalysis of the reaction: Produces alpha-D-fructofuranose beta-D-fructofuranose 1,2':2,1'-dianhydride (DFA I) by successively eliminating the diminishing (2->1)-beta-D-fructan (inulin) chain from the terminal D-fructosyl-D-fructosyl disaccharide. Catalysis of the reaction: Eliminative cleavage of (1->4)-beta-D-glucuronans to give oligosaccharides with 4-deoxy-beta-D-gluc-4-enuronosyl groups at their non-reducing ends. Complete degradation of glucuronans results in the formation of tetrasaccharides. Catalysis of the cleavage of a carbon-oxygen bond by the elimination of an alcohol from a polysaccharide. Catalysis of the reaction: Elimination of alpha-sialyl groups in N-acetylneuraminic acid glycosides, releasing 2,7-anhydro-alpha-N-acetylneuraminate. Catalysis of the eliminative degradation of polysaccharides containing 1,4-beta-D-hexosaminyl and 1,3-beta-D-glucuronosyl linkages to disaccharides containing 4-deoxy-beta-D-gluc-4-enuronosyl groups. Catalysis of the reaction: hyaluronate = n 3-(4-deoxy-beta-D-gluc-4-enuronosyl)-N-acetyl-D-glucosamine. Catalysis of the eliminative cleavage of 4-(4-deoxy-a-D-galact-4-enuronosyl)-D-galacturonate from the reducing end of pectate, i.e. de-esterified pectin. Catalysis of the cleavage of (1,2)-alpha-L-Rhap-(1,4)-alpha-D-GalpA glycosidic linkage, generating oligosaccharides terminating at the non-reducing end with a hex-4-enopyranosyluronic acid residue. Catalysis of the eliminative cleavage of polysaccharides containing beta-D-mannuronate residues to give oligosaccharides with 4-deoxy-alpha-L-erythro-hex-4-enopyranuronosyl groups at their ends. Catalysis of the elimination of sulfate; appears to act on linkages between N-acetyl-D-glucosamine and uronate. Product is an unsaturated sugar. Catalysis of the eliminative cleavage of pectate to give oligosaccharides with 4-deoxy-alpha-D-gluc-4-enuronosyl groups at their non-reducing ends. Catalysis of the cleavage of C-C, C-O, C-N and other bonds by other means than by hydrolysis or oxidation, or conversely adding a group to a double bond. They differ from other enzymes in that two substrates are involved in one reaction direction, but only one in the other direction. When acting on the single substrate, a molecule is eliminated and this generates either a new double bond or a new ring. Catalysis of the eliminative cleavage of polysaccharides containing 1,4-linked D-glucuronate or L-iduronate residues and 1,4-alpha-linked 2-sulfoamino-2-deoxy-6-sulfo-D-glucose residues to give oligosaccharides with terminal 4-deoxy-alpha-D-gluc-4-enuronosyl groups at their nonreducing ends. Catalysis of the eliminative cleavage of the terminal b-D-mannosyl-b-D-1,4-glucuronosyl linkage of the side-chain of the polysaccharide xanthan, leaving a 4-deoxy-a-L-threo-hex-4-enuronosyl group at the terminus of the side-chain. Catalysis of the reaction: 4-(4-deoxy-beta-D-gluc-4-enuronosyl)-D-galacturonate = 25-dehydro-4-deoxy-D-glucuronate. Catalysis of the eliminative degradation of polysaccharides containing 1,4-beta-D-hexosaminyl and 1,3-beta-D-glucuronosyl or 1,3-alpha-L-iduronosyl linkages to disaccharides containing 4-deoxy-beta-D-gluc-4-enuronosyl groups. Catalysis of the reaction: linear alpha-glucan = 1,5-anhydro-D-fructose + beta-D-glucose. Catalysis of the eliminative cleavage of polysaccharides containing a terminal a-L-guluronate group, to give oligopolysaccharides with 4-deoxy-a-L-erythro-hex-4-enuronosyl groups at their nonreducing ends. Catalysis of the eliminative cleavage of (14)-a-D-galacturonan methyl ester to give oligosaccharides with 4-deoxy-6-O-methyl-a-D-galact-4-enuronosyl groups at their nonreducing ends.

View Gene Ontology (GO) Term

GO TERM SUMMARY
Name: carbon-oxygen lyase activity, acting on polysaccharides
Acc: GO:0016837
Aspect: Molecular Function
Desc: Catalysis of the cleavage of a carbon-oxygen bond by the elimination of an alcohol from a polysaccharide.
Proteins in PDR annotated with:
   This term: 6 [Search]
   Term or descendants: 32 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0016837 - carbon-oxygen lyase activity, acting on polysaccharides (interactive image map)
YRC Informatics Platform - Version 3.0
Created and Maintained by: Michael Riffle