    1.1.1.336 | crystal structure of the enzyme bound to the product UDP-N-acetyl-alpha-D-mannosaminuronate by X-ray diffraction to resolution of 1.55 A. Crystal structures reveal a tight dimeric polymer chains with product-bound in all the structures. The catalytic residues Cys258 and Lys204 are conserved. The Cys258 acts as catalytic nucleophile and Lys204 as acid/base catalyst. The product directly interacts with residues Arg211, Thr249, Arg244, Gly255, Arg289, Lys319 and Arg398. The SeMet-substituted enzyme is crystallized using microbatch sitting method under reservoir solution condition 10% (w/v) PEG 8000, 8% (v/v) ethylene glycol and 0.1 M HEPES, pH 7.5 |
