Cleavage of poly(4-deoxy-alpha-L-erythro-hexopyranuronoside) oligosaccharides with 4-deoxy-alpha-L-erythro-hex-4-enopyranuronosyl groups at their non-reducing ends into 4-deoxy-alpha-L-erythro-hex-4-enopyranuronate monosaccharides.
Comment
The enzyme degrades unsaturated oligosaccharides produced by the action of alginate lyases (EC 4.2.2.3 and EC 4.2.2.11) on alginate, by repeatedly removing the unsaturated residue from the non-reducing end until only unsaturated monosaccharides are left. The enzyme catalyses a beta-elimination reaction, generating a new unsaturated non-reducing end after removal of the pre-existing one.
Molecular identification of oligoalginate lyase of Sphingomonas sp. strain A1 as one of the enzymes required for complete depolymerization of alginate.
Comparative biochemical characterization of three exolytic oligoalginate lyases from Vibrio splendidus reveals complementary substrate scope, temperature, and pH adaptations.