5EJO

Crystal structure of the winged helix domain in Chromatin assembly factor 1 subunit p90


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A DNA binding winged helix domain in CAF-1 functions with PCNA to stabilize CAF-1 at replication forks

Zhang, K.Gao, Y.Li, J.Burgess, R.Han, J.Liang, H.Zhang, Z.Liu, Y.

(2016) Nucleic Acids Res. 44: 5083-5094

  • DOI: 10.1093/nar/gkw106

  • PubMed Abstract: 
  • Chromatin assembly factor 1 (CAF-1) is a histone H3-H4 chaperone that deposits newly synthesized histone (H3-H4)2 tetramers during replication-coupled nucleosome assembly. However, how CAF-1 functions in this process is not yet well understood. Here, ...

    Chromatin assembly factor 1 (CAF-1) is a histone H3-H4 chaperone that deposits newly synthesized histone (H3-H4)2 tetramers during replication-coupled nucleosome assembly. However, how CAF-1 functions in this process is not yet well understood. Here, we report the crystal structure of C terminus of Cac1 (Cac1C), a subunit of yeast CAF-1, and the function of this domain in stabilizing CAF-1 at replication forks. We show that Cac1C forms a winged helix domain (WHD) and binds DNA in a sequence-independent manner. Mutations in Cac1C that abolish DNA binding result in defects in transcriptional silencing and increased sensitivity to DNA damaging agents, and these defects are exacerbated when combined with Cac1 mutations deficient in PCNA binding. Similar phenotypes are observed for corresponding mutations in mouse CAF-1. These results reveal a mechanism conserved in eukaryotic cells whereby the ability of CAF-1 to bind DNA is important for its association with the DNA replication forks and subsequent nucleosome assembly.


    Organizational Affiliation

    State Key Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing 100101, China University of the Chinese Academy of Sciences, Beijing 100049, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Chromatin assembly factor 1 subunit p90
A
94Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: RLF2 (CAC1)
Find proteins for Q12495 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q12495
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.197 
  • Space Group: P 41 2 2
Unit Cell:
Length (Å)Angle (°)
a = 59.655α = 90.00
b = 59.655β = 90.00
c = 97.408γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data processing
PHENIXmodel building
SHELXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Science FoundationChina30925011, 31030024 and 31021062

Revision History 

  • Version 1.0: 2016-03-16
    Type: Initial release
  • Version 1.1: 2016-07-06
    Type: Database references