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-Structure paper
Title | Structural insights into histone binding and nucleosome assembly by chromatin assembly factor-1. |
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Journal, issue, pages | Science, Vol. 381, Issue 6660, Page eadd8673, Year 2023 |
Publish date | Aug 25, 2023 |
Authors | Chao-Pei Liu / Zhenyu Yu / Jun Xiong / Jie Hu / Aoqun Song / Dongbo Ding / Cong Yu / Na Yang / Mingzhu Wang / Juan Yu / Peini Hou / Kangning Zeng / Zhenyu Li / Zhuqiang Zhang / Xinzheng Zhang / Wei Li / Zhiguo Zhang / Bing Zhu / Guohong Li / Rui-Ming Xu / |
PubMed Abstract | Chromatin inheritance entails de novo nucleosome assembly after DNA replication by chromatin assembly factor-1 (CAF-1). Yet direct knowledge about CAF-1's histone binding mode and nucleosome assembly ...Chromatin inheritance entails de novo nucleosome assembly after DNA replication by chromatin assembly factor-1 (CAF-1). Yet direct knowledge about CAF-1's histone binding mode and nucleosome assembly process is lacking. In this work, we report the crystal structure of human CAF-1 in the absence of histones and the cryo-electron microscopy structure of CAF-1 in complex with histones H3 and H4. One histone H3-H4 heterodimer is bound by one CAF-1 complex mainly through the p60 subunit and the acidic domain of the p150 subunit. We also observed a dimeric CAF-1-H3-H4 supercomplex in which two H3-H4 heterodimers are poised for tetramer assembly and discovered that CAF-1 facilitates right-handed DNA wrapping of H3-H4 tetramers. These findings signify the involvement of DNA in H3-H4 tetramer formation and suggest a right-handed nucleosome precursor in chromatin replication. |
External links | Science / PubMed:37616371 / PubMed Central |
Methods | EM (single particle) / X-ray diffraction |
Resolution | 3.42 - 6.6 Å |
Structure data | EMDB-33625, PDB-7y5u: EMDB-33626, PDB-7y5v: EMDB-33627, PDB-7y5w: EMDB-33630, PDB-7y60: EMDB-33631, PDB-7y61: EMDB-35660: Composite cryo-EM density map of the dimeric human CAF1-H3-H4 complex EMDB-35661, PDB-8iqg: EMDB-35708: Cryo-EM consensus map of the dimeric human CAF1-H3-H4 complex EMDB-35709: Local refinement cryo-EM map of protomer I of the dimeric human CAF1-H3-H4 complex EMDB-35710: Local refinement cryo-EM map of protomer II of the dimeric human CAF1-H3-H4 complex EMDB-36013, PDB-8j6s: EMDB-36014, PDB-8j6t: PDB-7y5k: PDB-7y5l: PDB-7y5o: |
Chemicals | ChemComp-GOL: ChemComp-HOH: |
Source |
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Keywords | REPLICATION / Histone chaperone / Chromatin assembly factor / DNA BINDING PROTEIN/DNA / Left-handed / Di-tetrasome / DNA BINDING PROTEIN / DNA BINDING PROTEIN-DNA complex / REPLICATION/DNA / REPLICATION-DNA COMPLEX |