2IIJ image
Deposition Date 2006-09-28
Release Date 2007-02-13
Last Version Date 2024-05-29
Entry Detail
PDB ID:
2IIJ
Keywords:
CHAPERONE
Title:
Structure of human Asf1a in complex with histone H3
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
SOLUTION NMR
Conformers Calculated:
30
Conformers Submitted:
20
Selection Criteria:
structures with the lowest energy
2IIJ validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:ASF1A protein
Chain IDs:A
Chain Length:158
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9Y294 Pfam ID:PF04729
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Histone H3
Chain IDs:B
Chain Length:18
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q71DI3
Ligand Molecules
NA
Primary Citation
Structure of the histone chaperone asf1 bound to the histone h3 C-terminal helix and functional insights.
Structure 15 191 199 (2007)
PMID: 17292837 DOI: 10.1016/j.str.2007.01.002

Abstact

Asf1 is a histone chaperone that favors histone H3/H4 assembly and disassembly. We solved the structure of the conserved domain of human ASF1A in complex with the C-terminal helix of histone H3 using nuclear magnetic resonance spectroscopy. This structure is fully compatible with an association of ASF1 with the heterodimeric form of histones H3/H4. In our model, ASF1 substitutes for the second H3/H4 heterodimer that is normally found in heterotetrameric H3/H4 complexes. This result constitutes an essential step in the fundamental understanding of the mechanisms of nucleosome assembly by histone chaperones. Point mutations that perturb the Asf1/histone interface were designed from the structure. The decreased binding affinity of the Asf1-H3/H4 complex correlates with decreased levels of H3-K56 acetylation and phenotypic defects in vivo.

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Primary Citation of related structures
1TEY