tRNA overexpression rescues peripheral neuropathy caused by mutations in tRNA synthetase.
tRNA overexpression rescues peripheral neuropathy caused by mutations in tRNA synthetase.
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DOI:
10.1126/science.abb3356
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发表时间:
2021-09-03
期刊:
影响因子:
--
通讯作者:
Storkebaum E
中科院分区:
文献类型:
--
作者:
Zuko A;Mallik M;Thompson R;Spaulding EL;Wienand AR;Been M;Tadenev ALD;van Bakel N;Sijlmans C;Santos LA;Bussmann J;Catinozzi M;Das S;Kulshrestha D;Burgess RW;Ignatova Z;Storkebaum E
Heterozygous mutations in six tRNA synthetase genes cause Charcot-Marie-Tooth (CMT) peripheral neuropathy. CMT-mutant tRNA synthetases inhibit protein synthesis by an unknown mechanism. Here, we found that CMT-mutant glycyl-tRNA synthetases (GlyRS) bound tRNAGly, but failed to release it, resulting in tRNAGly sequestration. This sequestration potentially depleted the cellular tRNAGly pool, leading to insufficient glycyl-tRNAGly supply to the ribosome. Accordingly, we found ribosome stalling at glycine codons and activation of the integrated stress response (ISR) in affected motor neurons. Moreover, transgenic overexpression of tRNAGly rescued protein synthesis, peripheral neuropathy, and ISR activation in Drosophila and mouse CMT2D models. Conversely, inactivation of the ribosome rescue factor GTPBP2 exacerbated peripheral neuropathy. Our findings suggest a molecular mechanism for CMT2D, and elevating tRNAGly levels may thus have therapeutic potential. tRNAGly sequestration by mutant glycyl-tRNA synthetase triggers Charcot-Marie-Tooth peripheral neuropathy.
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DOI:
10.1038/s41580-018-0011-4
发表时间:
2018-08
期刊:
Nature reviews. Molecular cell biology
影响因子:
--
作者:
Schuller AP;Green R
通讯作者:
Green R
影响因子:
4
作者:
Storkebaum, Erik
通讯作者:
Storkebaum, Erik
影响因子:
4.5
作者:
Motley WW;Seburn KL;Nawaz MH;Miers KE;Cheng J;Antonellis A;Green ED;Talbot K;Yang XL;Fischbeck KH;Burgess RW
通讯作者:
Burgess RW
影响因子:
64.5
作者:
Sonenberg N;Hinnebusch AG
通讯作者:
Hinnebusch AG
影响因子:
5.3
作者:
Antonellis, Anthony;Lee-Lin, Shih-Queen;Green, Eric D.
通讯作者:
Green, Eric D.