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-Structure paper
タイトル | SUMO enhances unfolding of SUMO-polyubiquitin-modified substrates by the Ufd1/Npl4/Cdc48 complex. |
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ジャーナル・号・ページ | Proc Natl Acad Sci U S A, Vol. 120, Issue 1, Page e2213703120, Year 2023 |
掲載日 | 2023年1月3日 |
著者 | Hyein G Lee / Abigail A Lemmon / Christopher D Lima / |
PubMed 要旨 | The Ufd1/Npl4/Cdc48 complex is a universal protein segregase that plays key roles in eukaryotic cellular processes. Its functions orchestrating the clearance or removal of polyubiquitylated targets ...The Ufd1/Npl4/Cdc48 complex is a universal protein segregase that plays key roles in eukaryotic cellular processes. Its functions orchestrating the clearance or removal of polyubiquitylated targets are established; however, prior studies suggest that the complex also targets substrates modified by the ubiquitin-like protein SUMO. Here, we show that interactions between Ufd1 and SUMO enhance unfolding of substrates modified by SUMO-polyubiquitin hybrid chains by the budding yeast Ufd1/Npl4/Cdc48 complex compared to substrates modified by polyubiquitin chains, a difference that is accentuated when the complex has a choice between these substrates. Incubating Ufd1/Npl4/Cdc48 with a substrate modified by a SUMO-polyubiquitin hybrid chain produced a series of single-particle cryo-EM structures that reveal features of interactions between Ufd1/Npl4/Cdc48 and ubiquitin prior to and during unfolding of ubiquitin. These results are consistent with cellular functions for SUMO and ubiquitin modifications and support a physical model wherein Ufd1/Npl4/Cdc48, SUMO, and ubiquitin conjugation pathways converge to promote clearance of proteins modified with SUMO and polyubiquitin. |
リンク | Proc Natl Acad Sci U S A / PubMed:36574706 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 3.0 - 3.8 Å |
構造データ | EMDB-27273, PDB-8dar: EMDB-27274, PDB-8das: EMDB-27275, PDB-8dat: EMDB-27276, PDB-8dau: EMDB-27277, PDB-8dav: EMDB-27278, PDB-8daw: |
化合物 | ChemComp-ATP: ChemComp-ADP: ChemComp-ZN: |
由来 |
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キーワード | MOTOR PROTEIN / ATPASE / ATPASE COMPLEX / UBIQUITIN / SUMO / SMT3 / QUALITY CONTROL |