Transition-State Interactions in a Promiscuous Enzyme: Sulfate and Phosphate Monoester Hydrolysis by <i>Pseudomonas aeruginosa</i> Arylsulfatase
作者:Bert van Loo、Ryan Berry、Usa Boonyuen、Mark F. Mohamed、Marko Golicnik、Alvan C. Hengge、Florian Hollfelder
DOI:10.1021/acs.biochem.8b00996
日期:2019.3.12
mechanism for S-Obridge bond fission shifts, with decreasing leaving group ability, from charge compensation via Lewis acid interactions toward direct proton donation. 18Ononbridge KIEs indicate that the TS for PAS-catalyzed sulfate monoester hydrolysis has a significantly more associative character compared to the uncatalyzed reaction, while PAS-catalyzed phosphate monoester hydrolysis does not show this