Mutant Huntingtin stalls ribosomes and represses protein synthesis in a cellular model of Huntington disease.
Mutant Huntingtin stalls ribosomes and represses protein synthesis in a cellular model of Huntington disease.
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在亨廷顿氏病的细胞模型中,突变型亨廷汀会阻滞核糖体并抑制蛋白质合成。
DOI:
10.1038/s41467-021-21637-y
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发表时间:
2021-03-05
影响因子:
16.6
通讯作者:
Subramaniam S
中科院分区:
文献类型:
--
作者:
Eshraghi M;Karunadharma PP;Blin J;Shahani N;Ricci EP;Michel A;Urban NT;Galli N;Sharma M;Ramírez-Jarquín UN;Florescu K;Hernandez J;Subramaniam S
The polyglutamine expansion of huntingtin (mHTT) causes Huntington disease (HD) and neurodegeneration, but the mechanisms remain unclear. Here, we found that mHtt promotes ribosome stalling and suppresses protein synthesis in mouse HD striatal neuronal cells. Depletion of mHtt enhances protein synthesis and increases the speed of ribosomal translocation, while mHtt directly inhibits protein synthesis in vitro. Fmrp, a known regulator of ribosome stalling, is upregulated in HD, but its depletion has no discernible effect on protein synthesis or ribosome stalling in HD cells. We found interactions of ribosomal proteins and translating ribosomes with mHtt. High-resolution global ribosome footprint profiling (Ribo-Seq) and mRNA-Seq indicates a widespread shift in ribosome occupancy toward the 5′ and 3′ end and unique single-codon pauses on selected mRNA targets in HD cells, compared to controls. Thus, mHtt impedes ribosomal translocation during translation elongation, a mechanistic defect that can be exploited for HD therapeutics. Huntington disease (HD) is a neurodegenerative disorder caused by the expansion of a polyglutamine tract in the huntingtin (mHtt) protein. Here the authors suggest that mHtt promotes ribosome stalling and inhibits protein synthesis.
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影响因子:
7.7
作者:
Andreev DE;O'Connor PB;Fahey C;Kenny EM;Terenin IM;Dmitriev SE;Cormican P;Morris DW;Shatsky IN;Baranov PV
通讯作者:
Baranov PV
影响因子:
16.6
作者:
Aron R;Pellegrini P;Green EW;Maddison DC;Opoku-Nsiah K;Oliveira AO;Wong JS;Daub AC;Giorgini F;Muchowski P;Finkbeiner S
通讯作者:
Finkbeiner S
影响因子:
64.8
作者:
Brown A;Fernández IS;Gordiyenko Y;Ramakrishnan V
通讯作者:
Ramakrishnan V
影响因子:
5.3
作者:
Arrasate, Montserrat;Finkbeiner, Steven
通讯作者:
Finkbeiner, Steven
影响因子:
4.3
作者:
Brandstaetter H;Kruppa AJ;Buss F
通讯作者:
Buss F