Ribosome-associated quality-control mechanisms from bacteria to humans.
Ribosome-associated quality-control mechanisms from bacteria to humans.
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DOI:
10.1016/j.molcel.2022.03.038
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发表时间:
2022-04-21
期刊:
影响因子:
16
通讯作者:
Joazeiro, Claudio A. P.
中科院分区:
文献类型:
--
作者:
Filbeck, Sebastian;Cerullo, Federico;Pfeffer, Stefan;Joazeiro, Claudio A. P.
Ribosome-associated Quality Control (RQC) surveys incomplete nascent-polypeptides produced by interrupted translation. Central players in RQC are the human ribosome- and tRNA-binding protein, NEMF, and its orthologs, yeast Rqc2 and bacterial RqcH, which sense large ribosomal subunits obstructed with nascent-chains and then promote nascent-chain proteolysis. In canonical eukaryotic RQC, NEMF stabilizes the LTN1/Listerin E3 ligase binding to obstructed ribosomal subunits for nascent-chain ubiquitylation. Furthermore, NEMF orthologs across evolution modify nascent-chains by mediating C-terminal, untemplated polypeptide elongation. In eukaryotes, this process exposes ribosome-buried nascent-chain lysines, the ubiquitin acceptor sites, to LTN1. Remarkably, in both bacteria and eukaryotes, C-terminal tails also function as off-ribosome degrons. Here, we discuss recent findings on RQC mechanisms, and briefly review how ribosomal stalling is sensed upstream of RQC, including via ribosome collisions, from an evolutionary perspective. As RQC defects impair cellular fitness and cause neurodegeneration, this knowledge provides a framework for pathway-related biology and disease studies. Filbeck and colleagues discuss recent developments in the understanding of ribosome-associated protein quality control, a pathway conserved from bacteria to humans. They analyze the pathway’s underlying mechanisms, its activation by the stalling of ribosomes during translation and ensuing ribosome collisions, and defects in the components involved leading to neurodegeneration.
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影响因子:
16
作者:
Filbeck S;Cerullo F;Paternoga H;Tsaprailis G;Joazeiro CAP;Pfeffer S
通讯作者:
Pfeffer S
影响因子:
64.8
作者:
通讯作者:
--
DOI:
10.1073/pnas.0812819106
发表时间:
2009-02-17
影响因子:
11.1
作者:
Chu, Jessie;Hong, Nancy A.;Kay, Steve A.
通讯作者:
Kay, Steve A.
影响因子:
16.6
作者:
Garzia, Aitor;Jafarnejad, Seyed Mehdi;Sonenberg, Nahum
通讯作者:
Sonenberg, Nahum
影响因子:
7.7
作者:
Fei X;Bell TA;Barkow SR;Baker TA;Sauer RT
通讯作者:
Sauer RT