2I32

Structure of a human ASF1a-HIRA complex and insights into specificity of histone chaperone complex assembly


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.229 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Structure of a human ASF1a-HIRA complex and insights into specificity of histone chaperone complex assembly.

Tang, Y.Poustovoitov, M.V.Zhao, K.Garfinkel, M.Canutescu, A.Dunbrack, R.Adams, P.D.Marmorstein, R.

(2006) Nat Struct Mol Biol 13: 921-929

  • DOI: https://doi.org/10.1038/nsmb1147
  • Primary Citation of Related Structures:  
    2I32

  • PubMed Abstract: 

    Human HIRA, ASF1a, ASF1b and CAF-1 are evolutionally conserved histone chaperones that form multiple functionally distinct chromatin-assembly complexes, with roles linked to diverse nuclear process, such as DNA replication and formation of heterochromatin in senescent cells. We report the crystal structure of an ASF1a-HIRA heterodimer and a biochemical dissection of ASF1a's mutually exclusive interactions with HIRA and the p60 subunit of CAF-1. The HIRA B domain forms an antiparallel beta-hairpin that binds perpendicular to the strands of the beta-sandwich of ASF1a, via beta-sheet, salt bridge and van der Waals contacts. The N- and C-terminal regions of ASF1a and ASF1b determine the different affinities of these two proteins for HIRA, by contacting regions outside the HIRA B domain. CAF-1 p60 also uses B domain-like motifs for binding to ASF1a, thereby competing with HIRA. Together, these studies begin to define the molecular determinants of assembly of functionally diverse macromolecular histone chaperone complexes.


  • Organizational Affiliation

    The Wistar Institute, Philadelphia, Pennsylvania 19104, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Anti-Silencing Factor 1 paralog a
A, B
182Homo sapiensMutation(s): 0 
Gene Names: ASF1ADKFZp564E2182
UniProt & NIH Common Fund Data Resources
Find proteins for Q9Y294 (Homo sapiens)
Explore Q9Y294 
Go to UniProtKB:  Q9Y294
PHAROS:  Q9Y294
GTEx:  ENSG00000111875 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9Y294
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Histone Regulatory homolog AC [auth E],
D [auth F]
57Homo sapiensMutation(s): 0 
Gene Names: HIRADGCR1HIRTUPLE1
UniProt & NIH Common Fund Data Resources
Find proteins for P54198 (Homo sapiens)
Explore P54198 
Go to UniProtKB:  P54198
PHAROS:  P54198
GTEx:  ENSG00000100084 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP54198
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.229 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 116.226α = 90
b = 116.226β = 90
c = 167.599γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
CNSrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-09-19
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Refinement description
  • Version 1.4: 2023-08-30
    Changes: Data collection, Database references, Refinement description