The selective tRNA aminoacylation mechanism based on a single G•U pair.
The selective tRNA aminoacylation mechanism based on a single G•U pair.
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DOI:
10.1038/nature13440
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发表时间:
2014-06-26
期刊:
影响因子:
64.8
通讯作者:
Yokoyama, Shigeyuki
中科院分区:
文献类型:
--
作者:
Naganuma, Masahiro;Sekine, Shun-ichi;Chong, Yeeting Esther;Guo, Min;Yang, Xiang-Lei;Gamper, Howard;Hou, Ya-Ming;Schimmel, Paul;Yokoyama, Shigeyuki
Ligation of tRNAs with their cognate amino acids, by aminoacyl-tRNA synthetases, establishes the genetic code. Throughout evolution, tRNAAla selection by alanyl-tRNA synthetase (AlaRS) has depended predominantly on a single wobble base pair in the acceptor stem, G3•U70, mainly on the kcat level. Here we report the crystal structures of an archaeal AlaRS in complex with tRNAAla with G3•U70 and its A3•U70 variant. AlaRS interacts with both the minor- and major-groove sides of G3•U70, widening the major groove. The geometry difference between G3•U70 and A3•U70 is transmitted along the acceptor stem to the 3′-CCA region. Thus, the 3′-CCA region of tRNAAla with G3•U70 is oriented to the reactive route that reaches the active site, whereas that of the A3•U70 variant is folded back into the “non-reactive route”. This novel mechanism enables the single wobble pair to dominantly determine the specificity of tRNA selection, by an approximate 100-fold difference in kcat.
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DOI:
10.1126/science.1174343
发表时间:
2009-08-07
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Guo M;Chong YE;Beebe K;Shapiro R;Yang XL;Schimmel P
通讯作者:
Schimmel P
影响因子:
11.4
作者:
Beebe, K;de Pouplana, LR;Schimmel, P
通讯作者:
Schimmel, P
影响因子:
56.9
作者:
KIM, SH;SUDDATH, FL;RICH, A
通讯作者:
RICH, A
影响因子:
56.9
作者:
Gabriel, K;Schneider, J;McClain, WH
通讯作者:
McClain, WH
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