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.
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DOI:
10.1126/science.1198542
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发表时间:
2011-04-08
期刊:
影响因子:
--
通讯作者:
Wright PE
中科院分区:
文献类型:
--
作者:
Bhabha G;Lee J;Ekiert DC;Gam J;Wilson IA;Dyson HJ;Benkovic SJ;Wright PE
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.
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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
影响因子:
56.9
作者:
Boehr, David D.;McElheny, Dan;Wright, Peter E.
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DOI:
10.1073/pnas.0403337101
发表时间:
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通讯作者:
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