A dynamic knockout reveals that conformational fluctuations influence the chemical step of enzyme catalysis.

A dynamic knockout reveals that conformational fluctuations influence the chemical step of enzyme catalysis.
复制标题

DOI:
10.1126/science.1198542
复制
发表时间:
2011-04-08
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Wright PE
Wright PE
中科院分区:
其他
文献类型:
--
作者:
Bhabha G;Lee J;Ekiert DC;Gam J;Wilson IA;Dyson HJ;Benkovic SJ;Wright PE

文献摘要

参考文献

被引文献

相似文献

构象动力学在酶催化反应中起着关键作用。虽然蛋白质运动有明确的影响配体流量,酶催化的化学步骤中的动力学的作用还没有明确建立。我们产生了一个E.大肠杆菌二氢叶酸还原酶(DHFR),消除毫秒级的时间尺度波动的酶活性位点,而不扰乱其结构和静电预组织。值得注意的是,这种动态敲除严重损害氢化物转移。因此,我们已经发现了毫秒时间尺度上的构象波动和酶促反应的化学步骤之间的联系,对我们理解酶的机制和尝试设计新的蛋白质催化剂具有广泛的意义。
Conformational dynamics play a key role in enzyme catalysis. While protein motions have clear implications for ligand flux, a role for dynamics in the chemical step of enzyme catalysis has not been clearly established. We generated a mutant of E. coli dihydrofolate reductase (DHFR) that abrogates millisecond time scale fluctuations in the enzyme active site without perturbing its structural and electrostatic preorganization. Remarkably, this dynamic knockout severely impairs hydride transfer. Thus we have found a link between conformational fluctuations on the millisecond timescale and the chemical step of an enzymatic reaction, with broad implications for our understanding of enzyme mechanisms and for attempts to design novel protein catalysts.
DOI: 10.1110/ps.062724307
发表时间: 2007-06-01
期刊: PROTEIN SCIENCE
影响因子: 8
作者:
Khavrutskii, Ilja V.;Price, Daniel J.;Brooks, Charles L., III
通讯作者: Brooks, Charles L., III
DOI: 10.1126/science.1130258
发表时间: 2006-09-15
期刊: SCIENCE
影响因子: 56.9
作者:
Boehr, David D.;McElheny, Dan;Wright, Peter E.
通讯作者: Wright, Peter E.
DOI: 10.1073/pnas.0403337101
发表时间: 2004-06-29
影响因子: 11.1
作者:
Liang, ZX;Lee, T;Klinman, JP
通讯作者: Klinman, JP
DOI: 10.1110/ps.03219603
发表时间: 2003-10-01
期刊: PROTEIN SCIENCE
影响因子: 8
作者:
Osborne, MJ;Venkitakrishnan, RP;Wright, PE
通讯作者: Wright, PE
DOI: 10.1021/bi9716231
发表时间: 1997-12-16
期刊: BIOCHEMISTRY
影响因子: 2.9
作者:
Cameron, CE;Benkovic, SJ
通讯作者: Benkovic, SJ