Expression of the Neuronal tRNA n-Tr20 Regulates Synaptic Transmission and Seizure Susceptibility.
Expression of the Neuronal tRNA n-Tr20 Regulates Synaptic Transmission and Seizure Susceptibility.
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神经元tRNA n-Tr 20的表达调节突触传递和癫痫易感性
DOI:
10.1016/j.neuron.2020.07.023
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发表时间:
2020-10-14
期刊:
影响因子:
16.2
通讯作者:
Ackerman SL
中科院分区:
文献类型:
--
作者:
Kapur M;Ganguly A;Nagy G;Adamson SI;Chuang JH;Frankel WN;Ackerman SL
The mammalian genome has hundreds of nuclear-encoded tRNAs, but the contribution of individual tRNA genes to cellular and organismal function remains unknown. Here, we demonstrate that mutations in a neuronally enriched arginine tRNA, n-Tr20, increased seizure threshold and altered synaptic transmission. n-Tr20 expression also modulated seizures caused by an epilepsy-linked mutation in Gabrg2, a gene encoding a GABAA receptor subunit. Loss of n-Tr20 altered translation initiation by activating the integrated stress response and suppressing mTOR signaling, the latter of which may contribute to altered neurotransmission in mutant mice. Deletion of a highly expressed isoleucine tRNA similarly altered these signaling pathways in the brain, suggesting that regulation of translation initiation is a conserved response to tRNA loss. Our data indicate that loss of a single member of a tRNA family results in multiple cellular phenotypes, highlighting the disease-causing potential of tRNA mutations.
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影响因子:
14.9
作者:
Chan PP;Lowe TM
通讯作者:
Lowe TM
影响因子:
8.8
作者:
Benthall KN;Ong SL;Bateup HS
通讯作者:
Bateup HS
影响因子:
4.6
作者:
Averous J;Lambert-Langlais S;Mesclon F;Carraro V;Parry L;Jousse C;Bruhat A;Maurin AC;Pierre P;Proud CG;Fafournoux P
通讯作者:
Fafournoux P
影响因子:
64.5
作者:
Gingold, Hila;Tehler, Disa;Pilpel, Yitzhak
通讯作者:
Pilpel, Yitzhak
DOI:
10.1093/database/baw014
发表时间:
2016-03-17
影响因子:
5.8
作者:
Draizen, Eli J.;Shaytan, Alexey K.;Panchenko, Anna R.
通讯作者:
Panchenko, Anna R.