The Fic protein Doc uses an inverted substrate to phosphorylate and inactivate EF-Tu.
The Fic protein Doc uses an inverted substrate to phosphorylate and inactivate EF-Tu.
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FIC蛋白DOC使用倒立的底物磷酸化和失活的EF-TU。
DOI:
10.1038/nchembio.1364
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发表时间:
2013-12
影响因子:
14.8
通讯作者:
Zenkin, Nikolay
中科院分区:
文献类型:
--
作者:
Castro-Roa, Daniel;Garcia-Pino, Abel;De Gieter, Steven;van Nuland, Nico A. J.;Loris, Remy;Zenkin, Nikolay
Fic proteins are ubiquitous in all domains of life and play critical roles in multiple cellular processes through AMPylation of (transfer of AMP to) target proteins. Doc from the doc/phd toxin/antitoxin module is a member of the Fic family and inhibits bacterial translation by an unknown mechanism. Here we show that, in contrast to the predicted AMPylating activity, Doc is a new type of kinase that inhibits bacterial translation by phosphorylating the conserved threonine (Thr382) of the translation elongation factor EF-Tu, rendering it unable to bind aminoacylated tRNAs. We provide evidence that EF-Tu phosphorylation diverged from AMPylation by antiparallel binding of the NTP relative to the catalytic residues of the conserved Fic catalytic core of Doc. The results bring insights into the mechanism and role of phosphorylation of EF-Tu in bacterial physiology as well as represent an example of catalytic plasticity of enzymes and a mechanism for the evolution of new enzymatic activities.
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影响因子:
6.1
作者:
Konarev, PV;Volkov, VV;Svergun, DI
通讯作者:
Svergun, DI
影响因子:
64.8
作者:
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Zhou, Jian-Min
DOI:
10.1107/s1744309108031722
发表时间:
2008-11-01
影响因子:
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作者:
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影响因子:
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作者:
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通讯作者:
Baker, D