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
Tanaka I
中科院分区:
生物学2区
文献类型:
--
作者:
Nakamura A;Sheppard K;Yamane J;Yao M;Söll D;Tanaka I

文献摘要

参考文献

被引文献

相似文献

在许多原核生物中,酰胺氨酰基-tRNA、Gln-tRNAGln 和 Asn-tRNAAsn 的生物合成通过间接途径进行,其中错误的 Glu-tRNAGln 或 Asp-tRNAAsn 在 tRNA 依赖性酰胺转移酶 (AdT) 的催化下酰胺化为正确的氨酰基-tRNA。存在两种类型的 AdT:细菌、古细菌和细胞器具有异三聚体 GatCAB,而异二聚体 GatDE 只存在于古细菌中。细菌 GatCAB 和 GatDE 识别受体茎的第一个碱基对及其 tRNA 底物的 D 环,而古细菌 GatCAB 识别 tRNA 的三级核心,但不识别第一个碱基对。在这里,我们展示了全长金黄色葡萄球菌 GatCAB 的晶体结构。其 GatB 尾部结构域具有保守的富含 Lys 的基序,该基序位于 GatCAB:tRNAGln 对接模型中的可变环附近。该基序在古细菌 GatCAB 的尾部结构域中也保守,表明该基本区域可能识别 tRNA 可变环以区分古细菌中的 Asp-tRNAAsn 和 Asp-tRNAAsp。此外,我们在 GatB 中发现了一个 310 转角,它允许细菌 GatCAB 区分 U1-A72 碱基对和 G1-C72 对;古细菌 GatCAB 中缺乏该元件,使得后一种酶能够识别具有 G1-C72 碱基对的氨酰基-tRNA。
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.
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: 10.1107/s0021889803012779
发表时间: 2003-10-01
影响因子: 6.1
作者:
Konarev, PV;Volkov, VV;Svergun, DI
通讯作者: Svergun, DI
DOI: 10.1016/j.str.2008.02.013
发表时间: 2008-05-01
期刊: STRUCTURE
影响因子: 5.7
作者:
Boczkowska, Malgorzata;Rebowski, Grzegorz;Dominguez, Roberto
通讯作者: Dominguez, Roberto
DOI: 10.1128/jb.165.1.88-93.1986
发表时间: 1986-01-01
影响因子: 3.2
作者:
LAPOINTE, J;DUPLAIN, L;PROULX, M
通讯作者: PROULX, M
DOI: 10.1126/science.1128470
发表时间: 2006-06-30
期刊: SCIENCE
影响因子: 56.9
作者:
Oshikane, Hiroyuki;Sheppard, Kelly;Nureki, Osamu
通讯作者: Nureki, Osamu