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-Structure paper
タイトル | Structural mechanism of outer kinetochore Dam1-Ndc80 complex assembly on microtubules. |
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ジャーナル・号・ページ | Science, Vol. 382, Issue 6675, Page 1184-1190, Year 2023 |
掲載日 | 2023年12月8日 |
著者 | Kyle W Muir / Christopher Batters / Tom Dendooven / Jing Yang / Ziguo Zhang / Alister Burt / David Barford / |
PubMed 要旨 | Kinetochores couple chromosomes to the mitotic spindle to segregate the genome during cell division. An error correction mechanism drives the turnover of kinetochore-microtubule attachments until ...Kinetochores couple chromosomes to the mitotic spindle to segregate the genome during cell division. An error correction mechanism drives the turnover of kinetochore-microtubule attachments until biorientation is achieved. The structural basis for how kinetochore-mediated chromosome segregation is accomplished and regulated remains an outstanding question. In this work, we describe the cryo-electron microscopy structure of the budding yeast outer kinetochore Ndc80 and Dam1 ring complexes assembled onto microtubules. Complex assembly occurs through multiple interfaces, and a staple within Dam1 aids ring assembly. Perturbation of key interfaces suppresses yeast viability. Force-rupture assays indicated that this is a consequence of impaired kinetochore-microtubule attachment. The presence of error correction phosphorylation sites at Ndc80-Dam1 ring complex interfaces and the Dam1 staple explains how kinetochore-microtubule attachments are destabilized and reset. |
リンク | Science / PubMed:38060647 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 3.15 - 4.11 Å |
構造データ | EMDB-18246, PDB-8q84: EMDB-18247, PDB-8q85: EMDB-18485: Ndc80c microtubule complex |
由来 |
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キーワード | CELL CYCLE / Kinetochore / microtubule / error correction / chromosome segregation |