Coordination between aminoacylation and editing to protect against proteotoxicity.
Coordination between aminoacylation and editing to protect against proteotoxicity.
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DOI:
10.1093/nar/gkad778
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发表时间:
2023-10-27
影响因子:
14.9
通讯作者:
中科院分区:
文献类型:
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作者:
Aminoacyl-tRNA synthetases (aaRSs) are essential enzymes that ligate amino acids to tRNAs, and often require editing to ensure accurate protein synthesis. Recessive mutations in aaRSs cause various neurological disorders in humans, yet the underlying mechanism remains poorly understood. Pathogenic aaRS mutations frequently cause protein destabilization and aminoacylation deficiency. In this study, we report that combined aminoacylation and editing defects cause severe proteotoxicity. We show that the ths1-C268A mutation in yeast threonyl-tRNA synthetase (ThrRS) abolishes editing and causes heat sensitivity. Surprisingly, experimental evolution of the mutant results in intragenic mutations that restore heat resistance but not editing. ths1-C268A destabilizes ThrRS and decreases overall Thr-tRNAThr synthesis, while the suppressor mutations in the evolved strains improve aminoacylation. We further show that deficiency in either ThrRS aminoacylation or editing is insufficient to cause heat sensitivity, and that ths1-C268A impairs ribosome-associated quality control. Our results suggest that aminoacylation deficiency predisposes cells to proteotoxic stress.
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影响因子:
64.8
作者:
He W;Bai G;Zhou H;Wei N;White NM;Lauer J;Liu H;Shi Y;Dumitru CD;Lettieri K;Shubayev V;Jordanova A;Guergueltcheva V;Griffin PR;Burgess RW;Pfaff SL;Yang XL
通讯作者:
Yang XL
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:
6.4
作者:
Kelly, Paul;Backes, Nicholas;Ibba, Michael
通讯作者:
Ibba, Michael
DOI:
10.1016/bs.enz.2020.06.009
发表时间:
2020-01-01
期刊:
BIOLOGY OF AMINOACYL-TRNA SYNTHETASES
影响因子:
--
作者:
Jiang, Lei;Jones, Julia;Yang, Xiang-Lei
通讯作者:
Yang, Xiang-Lei
DOI:
10.1073/pnas.1420196111
发表时间:
2014-12-09
影响因子:
11.1
作者:
Liu, Ye;Satz, Jakob S.;Ackerman, Susan L.
通讯作者:
Ackerman, Susan L.