The balance between pre- and post-transfer editing in tRNA synthetases.
The balance between pre- and post-transfer editing in tRNA synthetases.
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DOI:
10.1016/j.febslet.2009.11.071
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发表时间:
2010-01-21
期刊:
影响因子:
3.5
通讯作者:
Boniecki MT
中科院分区:
文献类型:
--
作者:
Martinis SA;Boniecki MT
The fidelity of tRNA aminoacylation is dependent in part on amino acid editing mechanisms. A hydrolytic activity that clears mischarged tRNAs typically resides in an active site on the tRNA synthetase that is distinct from its synthetic aminoacylation active site. A second pre-transfer editing pathway that hydrolyzes the tRNA synthetase aminoacyl adenylate intermediate can also be activated. Pre- and post-transfer editing activities can co-exist within a single tRNA synthetase resulting in a redundancy of fidelity mechanisms. However, in most cases one pathway appears to dominate, but when compromised, the secondary pathway can be activated to suppress tRNA synthetase infidelities.
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