Kinetics of Thiol/Disulfide Exchange Correlate Weakly with the Restoring Force in the Disulfide Moiety
作者:Timothy J. Kucharski、Zhen Huang、Qing-Zheng Yang、Yancong Tian、Nicholas C. Rubin、Carlos D. Concepcion、Roman Boulatov
DOI:10.1002/anie.200901511
日期:2009.9.7
series of increasingly strained macrocyclic disulfides investigated experimentally and by high‐level DFT calculations reveals that the kinetics of thiol/disulfideexchange are independent of the restoringforce in the disulfidemoiety. This finding is consistent with the SN2 mechanism of thiol/disulfideexchange and lends insight into the acceleration of disulfide reduction upon stretching of certain proteins
Experiments and computations are reported of how stretching a polymer containing an ester moiety affects the kinetics of its basic hydrolysis (see picture). DFT computations of complete conformational ensembles of three homologous esters suggest that a stretching force stabilizes the tetrahedral intermediate and the second transition state (TS) but has no effect on the relative energy of the first