Crystal structure of a NO-forming nitrite reductase mutant: an analog of a transition state in enzymatic reaction
Liu, S.Q., Chang, T., Liu, M.Y., LeGall, J., Chang, W.C., Zhang, J.P., Liang, D.C., Chang, W.R.(2003) Biochem Biophys Res Commun 302: 568-574
- PubMed: 12615072 
- DOI: 10.1016/s0006-291x(03)00166-9
- Primary Citation of Related Structures:  
1KCB - PubMed Abstract: 
I257E was obtained by site directed mutagenesis of nitrite reductase from Achromobacter cycloclastes. The mutant has no enzyme activity. Its crystal structure determined at 1.65A resolution shows that the side-chain carboxyl group of the mutated residue, Glu257, coordinates with the type 2 copper in the mutant and blocks the contact between the type 2 copper and its solvent channel, indicating that the accessibility of the type 2 copper is essential for maintaining the activity of nitrite reductase ...