Unsaturated 3S-rhamnoglycuronyl hydrolase

UniProtKB accession:  L7P9J4

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Glucuronyl hydrolase involved in ulvan degradation. Ulvan is the main polysaccharide component of the Ulvales (green seaweed) cell wall. It is composed of disaccharide building blocks comprising 3-sulfated rhamnose (Rha3S) linked to D-glucuronic acid (GlcA), L-iduronic acid (IduA), or D-xylose (Xyl). Unsaturated 3S-rhamnoglycuronyl hydrolase works together with ulvan lyases to fully degrade the ulvan polymer, catalyzing specifically the cleavage of the unsaturated 4-deoxy-L-threo-hex-4-enopyranosiduronic acid (deltaUA) of deltaUA-Rha3S disaccharides and deltaUA-Rha3S-Xyl-Rha3S tetrasaccharides, the end products of the ulvan lyase reaction. Also hydrolases deltaUA-Rha3S-IduA-Rha3S and deltaUA-Rha3S-GlcA-Rha3S tetrasaccharidestetrasaccharides. Prefers tetrasaccharides over disaccharides and prefers an uronic residue at subsite +2.