1v7x

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spinqualitylabelsall models 1v7x, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image

Crystal structure of Vibrio proteolyticus chitobiose phosphorylase in complex with GlcNAc and sulfate

Overview

Vibrio proteolyticus chitobiose phosphorylase (ChBP) belongs to glycosyl, transferase family 36 (GT-36), and catalyzes the reversible phosphorolysis, of chitobiose into alpha-GlcNAc-1-phosphate and GlcNAc with inversion of, the anomeric configuration. As the first known structures of a GT-36, enzyme, we determined the crystal structure of ChBP in a ternary complex, with GlcNAc and SO(4). It is also the first structures of an inverting, phosphorolytic enzyme in a complex with a sugar and a sulfate ion, and, reveals a pseudo-ternary complex structure of enzyme-sugar-phosphate. ChBP, comprises a beta sandwich domain and an (alpha/alpha)(6) barrel domain, constituting a distinctive structure among GT families. Instead, it shows, significant structural similarity with glycoside hydrolase (GH) enzymes, glucoamylases (GH-15), and maltose phosphorylase (GH-65) in clan GH-L. The, structural similarity reported here, together with distant sequence, similarities between ChBP and GHs, led to the reclassification of family, GT-36 into a novel GH family, namely GH-94.

About this Structure

1V7X is a Single protein structure of sequence from Vibrio proteolyticus with NDG, NAG, CA and SO4 as ligands. Full crystallographic information is available from OCA.

Reference

Chitobiose phosphorylase from Vibrio proteolyticus, a member of glycosyl transferase family 36, has a clan GH-L-like (alpha/alpha)(6) barrel fold., Hidaka M, Honda Y, Kitaoka M, Nirasawa S, Hayashi K, Wakagi T, Shoun H, Fushinobu S, Structure. 2004 Jun;12(6):937-47. PMID:15274915

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