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: 2.7 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.229 

wwPDB Validation 3D Report Full Report


This is version 1.3 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: 10.1038/nsmb1147

  • 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 heterochro ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Anti-Silencing Factor 1 paralog a
A, B
182Homo sapiensMutation(s): 0 
Gene Names: ASF1A
Find proteins for Q9Y294 (Homo sapiens)
Go to Gene View: ASF1A
Go to UniProtKB:  Q9Y294
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Histone Regulatory homolog A
E, F
57Homo sapiensMutation(s): 0 
Gene Names: HIRA (DGCR1, HIR, TUPLE1)
Find proteins for P54198 (Homo sapiens)
Go to Gene View: HIRA
Go to UniProtKB:  P54198
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 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 = 90.00
b = 116.226β = 90.00
c = 167.599γ = 120.00
Software Package:
Software NamePurpose
CNSrefinement
SCALEPACKdata scaling
HKL-2000data collection
HKL-2000data scaling
PDB_EXTRACTdata extraction
DENZOdata reduction
PHASERphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-09-19
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-18
    Type: Refinement description