+検索条件
-Structure paper
タイトル | Structure of the human inner kinetochore bound to a centromeric CENP-A nucleosome. |
---|---|
ジャーナル・号・ページ | Science, Vol. 376, Issue 6595, Page 844-852, Year 2022 |
掲載日 | 2022年5月20日 |
著者 | Stanislau Yatskevich / Kyle W Muir / Dom Bellini / Ziguo Zhang / Jing Yang / Thomas Tischer / Masa Predin / Tom Dendooven / Stephen H McLaughlin / David Barford / |
PubMed 要旨 | Kinetochores assemble onto specialized centromeric CENP-A (centromere protein A) nucleosomes (CENP-A) to mediate attachments between chromosomes and the mitotic spindle. We describe cryo-electron ...Kinetochores assemble onto specialized centromeric CENP-A (centromere protein A) nucleosomes (CENP-A) to mediate attachments between chromosomes and the mitotic spindle. We describe cryo-electron microscopy structures of the human inner kinetochore constitutive centromere associated network (CCAN) complex bound to CENP-A reconstituted onto α-satellite DNA. CCAN forms edge-on contacts with CENP-A, and a linker DNA segment of the α-satellite repeat emerges from the fully wrapped end of the nucleosome to thread through the central CENP-LN channel that tightly grips the DNA. The CENP-TWSX histone-fold module further augments DNA binding and partially wraps the linker DNA in a manner reminiscent of canonical nucleosomes. Our study suggests that the topological entrapment of the linker DNA by CCAN provides a robust mechanism by which kinetochores withstand both pushing and pulling forces exerted by the mitotic spindle. |
リンク | Science / PubMed:35420891 / PubMed Central |
手法 | EM (単粒子) / X線回折 |
解像度 | 2.44 - 12.0 Å |
構造データ | EMDB-13437, PDB-7pii: EMDB-13473, PDB-7pkn: EMDB-14334, PDB-7r5r: EMDB-14336, PDB-7r5s: EMDB-14341, PDB-7r5v: EMDB-14351, PDB-7ywx: EMDB-14375, PDB-7yyh: PDB-7pb4: PDB-7pb8: |
化合物 | ChemComp-HOH: |
由来 |
|
キーワード | CELL CYCLE / inner kinetochore / Kinetochore / chromosome segregation / centromere / Chromosome / cell division |