High Resolution X-Ray Crystallography Shows that Ascorbate is a Cofactor for Myrosinase and Substitutes for the Function of the Catalytic Base
Burmeister, W.P., Cottaz, S., Rollin, P., Vasella, A., Henrissat, B.(2000) J Biol Chem 275: 39385
- PubMed: 10978344 
- DOI: 10.1074/jbc.M006796200
- Primary Citation of Related Structures:  
1E4M, 1E6Q, 1E6S, 1E6X, 1E70, 1E71, 1E72, 1E73 - PubMed Abstract: 
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 ...