8J6T image
Deposition Date 2023-04-26
Release Date 2023-08-16
Last Version Date 2023-09-06
Entry Detail
PDB ID:
8J6T
Keywords:
REPLICATION/DNA
Title:
Cryo-EM structure of the double CAF-1 bound right-handed Di-tetrasome
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
synthetic construct (Taxon ID: 32630)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
ELECTRON MICROSCOPY
Resolution:
6.60 Å
Aggregation State:
PARTICLE
Reconstruction Method:
SINGLE PARTICLE
8J6T validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Histone H3.1
Gene (Uniprot):H3C1, H3C2, H3C3, H3C4, H3C6, H3C7, H3C8, H3C10, H3C11, H3C12
Chain IDs:A (auth: G), C (auth: E), F (auth: C), H (auth: A)
Chain Length:136
Number of Molecules:4
Biological Source:Homo sapiens
UniProt ID:P68431 Pfam ID:PF00125
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Histone H4
Gene (Uniprot):H4C1, H4C2, H4C3, H4C4, H4C5, H4C6, H4C8, H4C9, H4C11, H4C12, H4C13, H4C14, H4C15, H4C16
Chain IDs:B (auth: H), D (auth: F), G (auth: D), I (auth: B)
Chain Length:103
Number of Molecules:4
Biological Source:Homo sapiens
UniProt ID:P62805 Pfam ID:PF15511
Polymer Type:polydeoxyribonucleotide
Molecule:Widom 601 DNA (147-MER)
Chain IDs:E (auth: I)
Chain Length:147
Number of Molecules:1
Biological Source:synthetic construct
Polymer Type:polydeoxyribonucleotide
Molecule:Widom 601 DNA (147-MER)
Chain IDs:J
Chain Length:147
Number of Molecules:1
Biological Source:synthetic construct
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Chromatin assembly factor 1 subunit A
Gene (Uniprot):CHAF1A
Chain IDs:K, M
Chain Length:956
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:Q13111 Pfam ID:PF15557, PF11600, PF12253, PF15539
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Chromatin assembly factor 1 subunit B
Gene (Uniprot):CHAF1B
Chain IDs:L, N
Chain Length:559
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:Q13112 Pfam ID:PF00400, PF15512
Ligand Molecules
NA
Primary Citation
Structural insights into histone binding and nucleosome assembly by chromatin assembly factor-1.
Science 381 eadd8673 eadd8673 (2023)
PMID: 37616371 DOI: 10.1126/science.add8673

Abstact

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.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
8J6T