1e6x

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spinqualitylabelsall models 1e6x, resolution 1.6Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image

MYROSINASE FROM SINAPIS ALBA WITH A BOUND TRANSITION STATE ANALOGUE,D-GLUCONO-1,5-LACTONE

Overview

Myrosinase, an S-glycosidase, hydrolyzes plant anionic, 1-thio-beta-d-glucosides (glucosinolates) considered part of the plant, defense system. Although O-glycosidases are ubiquitous, myrosinase is the, only known S-glycosidase. Its active site is very similar to that of, retaining O-glycosidases, but one of the catalytic residues in, O-glycosidases, a carboxylate residue functioning as the general base, is, replaced by a glutamine residue. Myrosinase is strongly activated by, ascorbic acid. Several binary and ternary complexes of myrosinase with, different transition state analogues and ascorbic acid have been analyzed, at high resolution by x-ray crystallography along with a, 2-deoxy-2-fluoro-glucosyl enzyme intermediate. One of the inhibitors, d-gluconhydroximo-1,5-lactam, binds ... [(full description)]

About this Structure

1E6X is a [Protein complex] structure of sequences from [Sinapis alba] with NAG, LGC, ZN, SO4 and GOL as [ligands]. Active as [[1]], with EC number [3.2.3.1]. Full crystallographic information is available from [OCA].

Reference

High resolution X-ray crystallography shows that ascorbate is a cofactor for myrosinase and substitutes for the function of the catalytic base., Burmeister WP, Cottaz S, Rollin P, Vasella A, Henrissat B, J Biol Chem. 2000 Dec 15;275(50):39385-93. PMID:10978344

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