Structural dynamics of the aminoacylation and proofreading functional cycle of bacterial leucyl-tRNA synthetase.
Structural dynamics of the aminoacylation and proofreading functional cycle of bacterial leucyl-tRNA synthetase.
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DOI:
10.1038/nsmb.2317
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发表时间:
2012-06-10
影响因子:
16.8
通讯作者:
Cusack, Stephen
中科院分区:
文献类型:
--
作者:
Palencia, Andres;Crepin, Thibaut;Vu, Michael T.;Lincecum, Tommie L., Jr.;Martinis, Susan A.;Cusack, Stephen
Leucyl-tRNA synthetase (LeuRS) produces error free leucyl-tRNALeu by coordinating translocation of the 3′ end of (mis-)charged tRNAs from its synthetic site to a separate proof-reading site for editing. Here we report co-crystal structures of the Escherichia coli LeuRS-tRNALeu complex in the aminoacylation or editing conformations and show that translocation involves correlated rotations of four flexibly linked LeuRS domains. This pivots the tRNA to guide the charged tRNA 3′ end from the closed aminoacylation state to the editing site. The editing domain unexpectedly stabilizes the tRNA during aminoacylation while a large rotation of the leucine-specific domain positions the conserved KMSKS loop to bind the 3′ end of the tRNA, promoting catalysis. Our results give new insight into the structural dynamics of a molecular machine that is essential for accurate protein synthesis.
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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
DOI:
10.1038/nsb934
发表时间:
2003-06-01
期刊:
NATURE STRUCTURAL BIOLOGY
影响因子:
--
作者:
Kobayashi, T;Nureki, O;Yokoyama, S
通讯作者:
Yokoyama, S
影响因子:
11.4
作者:
Cusack, S;Yaremchuk, A;Tukalo, M
通讯作者:
Tukalo, M
影响因子:
16.8
作者:
Fukunaga, R;Yokoyama, S
通讯作者:
Yokoyama, S
影响因子:
7.3
作者:
Ding, Dazhong;Meng, Qingqing;Zhou, Huchen
通讯作者:
Zhou, Huchen