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-Structure paper
タイトル | Hexasome-INO80 complex reveals structural basis of noncanonical nucleosome remodeling. |
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ジャーナル・号・ページ | Science, Vol. 381, Issue 6655, Page 313-319, Year 2023 |
掲載日 | 2023年7月21日 |
著者 | Min Zhang / Anna Jungblut / Franziska Kunert / Luis Hauptmann / Thomas Hoffmann / Olga Kolesnikova / Felix Metzner / Manuela Moldt / Felix Weis / Frank DiMaio / Karl-Peter Hopfner / Sebastian Eustermann / |
PubMed 要旨 | Loss of H2A-H2B histone dimers is a hallmark of actively transcribed genes, but how the cellular machinery functions in the context of noncanonical nucleosomal particles remains largely elusive. In ...Loss of H2A-H2B histone dimers is a hallmark of actively transcribed genes, but how the cellular machinery functions in the context of noncanonical nucleosomal particles remains largely elusive. In this work, we report the structural mechanism for adenosine 5'-triphosphate-dependent chromatin remodeling of hexasomes by the INO80 complex. We show how INO80 recognizes noncanonical DNA and histone features of hexasomes that emerge from the loss of H2A-H2B. A large structural rearrangement switches the catalytic core of INO80 into a distinct, spin-rotated mode of remodeling while its nuclear actin module remains tethered to long stretches of unwrapped linker DNA. Direct sensing of an exposed H3-H4 histone interface activates INO80, independently of the H2A-H2B acidic patch. Our findings reveal how the loss of H2A-H2B grants remodelers access to a different, yet unexplored layer of energy-driven chromatin regulation. |
リンク | Science / PubMed:37384673 |
手法 | EM (単粒子) |
解像度 | 2.7 - 7.59 Å |
構造データ | EMDB-17006: CryoEM Structure INO80core Hexasome complex composite map state1 EMDB-17007, PDB-8oo9: EMDB-17008, PDB-8ooa: EMDB-17010, PDB-8ooc: EMDB-17012, PDB-8oof: EMDB-17017, PDB-8ook: EMDB-17025: INO80 core bound to hexasome composite map of state 2 EMDB-17026, PDB-8oor: EMDB-17027, PDB-8oos: EMDB-17028, PDB-8oot: EMDB-17676: INO80 core bound to hexasome focused refinement of Arp5 grappler |
化合物 | ChemComp-ADP: ChemComp-ALF: ChemComp-MG: ChemComp-ATP: |
由来 |
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キーワード | DNA BINDING PROTEIN / ATP-dependent chromatin remodeler |