3.5.4.25 | Zn2+ |
wild-type enzyme contains 0.71 mol Zn2+ per mol of subunit, while the content in the mutant enzymes is reduced to below 0.1 mol Zn2+ per mol of subunit, essential for activity, bound to the active site, required for ring opening and formate release with zinc acting as a Lewis acid, which activates the 2 water molecules involved in the sequential hydrolysis of 2 carbon-nitrogen bonds |
655443 |