Probing Synergy between Two Catalytic Strategies in the Glycoside Hydrolase <i>O</i>-GlcNAcase Using Multiple Linear Free Energy Relationships
作者:Ian R. Greig、Matthew S. Macauley、Ian H. Williams、David J. Vocadlo
DOI:10.1021/ja904506u
日期:2009.9.23
revealing changes in mechanism, transition state, and rate-determining step upon concomitant variation of both nucleophilic strength and leaving group abilities are observed. The observed changes in mechanism reflect the roles played by the enzymic general acid and the catalytic nucleophile. Significantly, these results illustrate how the enzyme synergistically harnesses both modes of catalysis; a feature that