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-Structure paper
| タイトル | Cryo-EM structures of apo-APC/C and APC/C complexes provide insights into APC/C regulation. |
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| ジャーナル・号・ページ | Nat Commun, Vol. 15, Issue 1, Page 10074, Year 2024 |
| 掲載日 | 2024年11月21日 |
著者 | Anna Höfler / Jun Yu / Jing Yang / Ziguo Zhang / Leifu Chang / Stephen H McLaughlin / Geoffrey W Grime / Elspeth F Garman / Andreas Boland / David Barford / ![]() |
| PubMed 要旨 | APC/C is a multi-subunit complex that functions as a master regulator of cell division. It controls progression through the cell cycle by timely marking mitotic cyclins and other cell cycle ...APC/C is a multi-subunit complex that functions as a master regulator of cell division. It controls progression through the cell cycle by timely marking mitotic cyclins and other cell cycle regulatory proteins for degradation. The APC/C itself is regulated by the sequential action of its coactivator subunits CDC20 and CDH1, post-translational modifications, and its inhibitory binding partners EMI1 and the mitotic checkpoint complex. In this study, we took advantage of developments in cryo-electron microscopy to determine the structures of human APC/C and apo-APC/C at 2.9 Å and 3.2 Å resolution, respectively, providing insights into the regulation of APC/C activity. The high-resolution maps allow the unambiguous assignment of an α-helix to the N-terminus of CDH1 (CDH1) in the APC/C ternary complex. We also identify a zinc-binding module in APC2 that confers structural stability to the complex, and we confirm the presence of zinc ions experimentally. Finally, due to the higher resolution and well defined density of these maps, we are able to build, aided by AlphaFold predictions, several intrinsically disordered regions in different APC/C subunits that likely play a role in proper APC/C assembly and regulation of its activity. |
リンク | Nat Commun / PubMed:39567505 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.85 - 3.2 Å |
| 構造データ | EMDB-13931, PDB-9gaw: ![]() EMDB-13932: ![]() EMDB-13933: EMDB-17751, PDB-8pkp: EMDB-19711: Cryo-EM structure of the Anaphase-promoting complex/cyclosome (APC/C) bound to co-activator Cdh1 at 3.2 Angstrom resolution ![]() EMDB-51070: Focused refined map of the Anaphase-promoting complex/cyclosome (APC/C) with mask 3 EMDB-51190, PDB-9gaw: |
| 化合物 | ![]() ChemComp-ZN: |
| 由来 |
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キーワード | CELL CYCLE / APC/C / cyclosome / Cdc20 / Cdh1 / ubiquitination / Emi1 / mitosis |
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