Structure of an inactive conformation of GTP-bound RhoA GTPase.
Structure of an inactive conformation of GTP-bound RhoA GTPase.
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DOI:
10.1016/j.str.2020.12.015
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发表时间:
2021-06-03
期刊:
影响因子:
--
通讯作者:
Zheng Y
中科院分区:
文献类型:
--
作者:
Lin Y;Lu S;Zhang J;Zheng Y
By using 31P NMR, we present evidence that the Rho family GTPase RhoA, like Ras GTPases, exists in an equilibrium of conformations when bound to GTP. High resolution crystal structures of RhoA bound to the GTP analog GMPPNP and to GDP show that they display a similar overall inactive conformation. In contrast to the previously reported crystal structures of GTP-analog bound form of two RhoA dominantly active mutants (G14V and Q63L), GMPPNP-bound RhoA assumes an open conformation in the Switch I loop with a previously unseen interaction between the γ-phosphate and Pro36, instead of the canonical Thr37. Molecular dynamics simulations found that the oncogenic RhoAG14V mutant displays a reduced flexibility in the Switch regions, consistent with a crystal structure of GDP-bound RhoAG14V. Thus, GDP- and GTP-bound RhoA can present similar inactive conformations, and the molecular dynamics in the Switch regions are likely to have a role in RhoA activation. Lin et al. demonstrate that RhoA-GTP exists in an inactive conformation with a crystal structure of RhoA bound to the GTP analog GMPPNP. Inherent dynamics in the Switches I & II regions are important for RhoA activation and are modulated by the oncogenic mutation G14V.
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DOI:
10.1107/s090744491003982x
发表时间:
2011-04
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Evans PR
通讯作者:
Evans PR
影响因子:
30.8
作者:
Krauthammer, Michael;Kong, Yong;Ha, Byung Hak;Evans, Perry;Bacchiocchi, Antonella;McCusker, James P.;Cheng, Elaine;Davis, Matthew J.;Goh, Gerald;Choi, Murim;Ariyan, Stephan;Narayan, Deepak;Dutton-Regester, Ken;Capatana, Ana;Holman, Edna C.;Bosenberg, Marcus;Sznol, Mario;Kluger, Harriet M.;Brash, Douglas E.;Stern, David F.;Materin, Miguel A.;Lo, Roger S.;Mane, Shrikant;Ma, Shuangge;Kidd, Kenneth K.;Hayward, Nicholas K.;Lifton, Richard P.;Schlessinger, Joseph;Boggon, Titus J.;Halaban, Ruth
通讯作者:
Halaban, Ruth
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
5.7
作者:
Buhrman, Greg;Wink, Glenna;Mattos, Carla
通讯作者:
Mattos, Carla
影响因子:
16.6
作者:
Long, Dong;Marshall, Christopher B.;Kay, Lewis E.
通讯作者:
Kay, Lewis E.