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-Structure paper
タイトル | UFMylation orchestrates spatiotemporal coordination of RQC at the ER. |
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ジャーナル・号・ページ | Sci Adv, Vol. 11, Issue 18, Page eadv0435, Year 2025 |
掲載日 | 2025年5月2日 |
![]() | Ivan Penchev / Samantha Gumbin / Francesco Scavone / Otto Berninghausen / Thomas Becker / Ron Kopito / Roland Beckmann / ![]() ![]() |
PubMed 要旨 | Degradation of arrest peptides from endoplasmic reticulum (ER) translocon-bound 60 ribosomal subunits via the ribosome-associated quality control (ER-RQC) pathway requires covalent modification of ...Degradation of arrest peptides from endoplasmic reticulum (ER) translocon-bound 60 ribosomal subunits via the ribosome-associated quality control (ER-RQC) pathway requires covalent modification of RPL26/uL24 on 60 ribosomal subunits with UFM1. However, the underlying mechanism that coordinates the UFMylation and RQC pathways remains elusive. Structural analysis of ER-RQC intermediates revealed concomitant binding and direct interaction of the UFMylation and RQC machineries on the 60. In the presence of an arrested peptidyl-transfer RNA, the RQC factor NEMF and the UFM1 E3 ligase (E3) form a direct interaction via the UFL1 subunit of E3, and UFL1 adopts a conformation distinct from that previously observed for posttermination 60. While this concomitant binding occurs on translocon-bound 60, LTN1 recruitment and arrest peptide degradation require UFMylation-dependent 60 dissociation from the translocon. These data reveal a mechanism by which the UFMylation cycle orchestrates ER-RQC. |
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手法 | EM (単粒子) |
解像度 | 2.8 - 4.0 Å |
構造データ | EMDB-51681, PDB-9gy4: ![]() EMDB-51682: 60S ribosomal subunit in complex with E3-UFM1 ligase and RQC machinery components NEMF and LTN1 (60S body) ![]() EMDB-51683: 60S ribosomal subunit in complex with E3-UFM1 ligase and RQC machinery components NEMF and LTN1 (UFM1 E3 ligase and NEMF) ![]() EMDB-51684: 60S ribosomal subunit in complex with E3-UFM1 ligase and RQC machinery components NEMF and LTN1 (LTN1) ![]() EMDB-51685: 60S ribosomal subunit in complex with E3-UFM1 ligase and RQC machinery components NEMF and LTN1 (Consensus refinement map) ![]() EMDB-51686: 60S ribosomal subunit in complex with RQC components NEMF and LTN1 ![]() EMDB-51687: 60S ribosomal subunit in complex with E3-UFM1 ligase, NEMF, and Sec61 ![]() EMDB-51688: 60S ribosomal subunit in complex with NEMF and Sec61 |
化合物 | ![]() ChemComp-MG: ![]() ChemComp-ZN: |
由来 |
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![]() | RIBOSOME / 60S / UFMylation / ER / RQC |