Two distinct regions in Staphylococcus aureus GatCAB guarantee accurate tRNA recognition.
Two distinct regions in Staphylococcus aureus GatCAB guarantee accurate tRNA recognition.
复制标题
金黄色葡萄球菌gatcab中的两个不同区域可确保准确的tRNA识别。
DOI:
10.1093/nar/gkp955
复制
发表时间:
2010-01
影响因子:
14.9
通讯作者:
Tanaka I
中科院分区:
文献类型:
--
作者:
Nakamura A;Sheppard K;Yamane J;Yao M;Söll D;Tanaka I
In many prokaryotes the biosynthesis of the amide aminoacyl-tRNAs, Gln-tRNAGln and Asn-tRNAAsn, proceeds by an indirect route in which mischarged Glu-tRNAGln or Asp-tRNAAsn is amidated to the correct aminoacyl-tRNA catalyzed by a tRNA-dependent amidotransferase (AdT). Two types of AdTs exist: bacteria, archaea and organelles possess heterotrimeric GatCAB, while heterodimeric GatDE occurs exclusively in archaea. Bacterial GatCAB and GatDE recognize the first base pair of the acceptor stem and the D-loop of their tRNA substrates, while archaeal GatCAB recognizes the tertiary core of the tRNA, but not the first base pair. Here, we present the crystal structure of the full-length Staphylococcus aureus GatCAB. Its GatB tail domain possesses a conserved Lys rich motif that is situated close to the variable loop in a GatCAB:tRNAGln docking model. This motif is also conserved in the tail domain of archaeal GatCAB, suggesting this basic region may recognize the tRNA variable loop to discriminate Asp-tRNAAsn from Asp-tRNAAsp in archaea. Furthermore, we identified a 310 turn in GatB that permits the bacterial GatCAB to distinguish a U1–A72 base pair from a G1–C72 pair; the absence of this element in archaeal GatCAB enables the latter enzyme to recognize aminoacyl-tRNAs with G1–C72 base pairs.
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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
影响因子:
6.1
作者:
Konarev, PV;Volkov, VV;Svergun, DI
通讯作者:
Svergun, DI
影响因子:
5.7
作者:
Boczkowska, Malgorzata;Rebowski, Grzegorz;Dominguez, Roberto
通讯作者:
Dominguez, Roberto
影响因子:
3.2
作者:
LAPOINTE, J;DUPLAIN, L;PROULX, M
通讯作者:
PROULX, M
影响因子:
56.9
作者:
Oshikane, Hiroyuki;Sheppard, Kelly;Nureki, Osamu
通讯作者:
Nureki, Osamu