4Z2N

Crystal structure of human FACT SPT16 middle domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.92 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.178 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Integrated molecular mechanism directing nucleosome reorganization by human FACT.

Tsunaka, Y.Fujiwara, Y.Oyama, T.Hirose, S.Morikawa, K.

(2016) Genes Dev 30: 673-686

  • DOI: https://doi.org/10.1101/gad.274183.115
  • Primary Citation of Related Structures:  
    4Z2M, 4Z2N

  • PubMed Abstract: 

    Facilitates chromatin transcription (FACT) plays essential roles in chromatin remodeling during DNA transcription, replication, and repair. Our structural and biochemical studies of human FACT-histone interactions present precise views of nucleosome reorganization, conducted by the FACT-SPT16 (suppressor of Ty 16) Mid domain and its adjacent acidic AID segment. AID accesses the H2B N-terminal basic region exposed by partial unwrapping of the nucleosomal DNA, thereby triggering the invasion of FACT into the nucleosome. The crystal structure of the Mid domain complexed with an H3-H4 tetramer exhibits two separate contact sites; the Mid domain forms a novel intermolecular β structure with H4. At the other site, the Mid-H2A steric collision on the H2A-docking surface of the H3-H4 tetramer within the nucleosome induces H2A-H2B displacement. This integrated mechanism results in disrupting the H3 αN helix, which is essential for retaining the nucleosomal DNA ends, and hence facilitates DNA stripping from histone.


  • Organizational Affiliation

    Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency, Sakyo-ku, Kyoto 606-8501, Japan; Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan; Department of Gene Mechanisms, Graduate School of Biostudies, Kyoto University, Yoshida-konoemachi, Sakyo-ku, Kyoto 606-8501, Japan; International Institute for Advanced Studies, Kizugawa-shi, Kyoto 619-0225, Japan;


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
FACT complex subunit SPT16287Homo sapiensMutation(s): 0 
Gene Names: SUPT16HFACT140FACTP140
UniProt & NIH Common Fund Data Resources
Find proteins for Q9Y5B9 (Homo sapiens)
Explore Q9Y5B9 
Go to UniProtKB:  Q9Y5B9
PHAROS:  Q9Y5B9
GTEx:  ENSG00000092201 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9Y5B9
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.92 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.178 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 160.891α = 90
b = 49.748β = 95.18
c = 40.048γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-03-09
    Type: Initial release
  • Version 1.1: 2016-03-23
    Changes: Database references
  • Version 1.2: 2016-03-30
    Changes: Database references
  • Version 1.3: 2020-02-19
    Changes: Data collection, Database references, Derived calculations
  • Version 1.4: 2023-11-08
    Changes: Data collection, Database references, Refinement description