4WNN

SPT16-H2A-H2B FACT HISTONE Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.179 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

FACT Disrupts Nucleosome Structure by Binding H2A-H2B with Conserved Peptide Motifs.

Kemble, D.J.McCullough, L.L.Whitby, F.G.Formosa, T.Hill, C.P.

(2015) Mol.Cell 60: 294-306

  • DOI: 10.1016/j.molcel.2015.09.008

  • PubMed Abstract: 
  • FACT, a heterodimer of Spt16 and Pob3, is an essential histone chaperone. We show that the H2A-H2B binding activity that is central to FACT function resides in short acidic regions near the C termini of each subunit. Mutations throughout these region ...

    FACT, a heterodimer of Spt16 and Pob3, is an essential histone chaperone. We show that the H2A-H2B binding activity that is central to FACT function resides in short acidic regions near the C termini of each subunit. Mutations throughout these regions affect binding and cause correlated phenotypes that range from mild to lethal, with the largest individual contributions unexpectedly coming from an aromatic residue and a nearby carboxylate residue within each domain. Spt16 and Pob3 bind overlapping sites on H2A-H2B, and Spt16-Pob3 heterodimers simultaneously bind two H2A-H2B dimers, the same stoichiometry as the components of a nucleosome. An Spt16:H2A-H2B crystal structure explains the biochemical and genetic data, provides a model for Pob3 binding, and implies a mechanism for FACT reorganization that we confirm biochemically. Moreover, unexpected similarity to binding of ANP32E and Swr1 with H2A.Z-H2B reveals that diverse H2A-H2B chaperones use common mechanisms of histone binding and regulating nucleosome functions.


    Organizational Affiliation

    Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT 84112-5650, USA.,Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT 84112-5650, USA. Electronic address: chris@biochem.utah.edu.,Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT 84112-5650, USA. Electronic address: tim@biochem.utah.edu.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Histone H2A.1
A, C, E, G
132Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: HTA1 (H2A1, SPT11)
Find proteins for P04911 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P04911
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Histone H2B.1
B, D, F, H
102Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: HTB1 (H2B1, SPT12)
Find proteins for P02293 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P02293
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
SPT16
T
20Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: SPT16 (CDC68, SSF1)
Find proteins for P32558 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P32558
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A, E
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.179 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 109.667α = 90.00
b = 109.667β = 90.00
c = 187.470γ = 120.00
Software Package:
Software NamePurpose
Blu-Icedata collection
SCALEPACKdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesP50GM082545
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesRO1GM059135
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesRO1GM064649
National Institutes of Health/National Cancer Institute (NIH/NCI)United StatesP30CA042014
Department of Energy (DOE, United States)United StatesDE-AC02-76SF00515
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesP41GM103393
National Institutes of Health/National Center for Research Resources (NIH/NCRR)United StatesP41RR001209

Revision History 

  • Version 1.0: 2015-10-21
    Type: Initial release
  • Version 1.1: 2015-10-28
    Type: Database references
  • Version 1.2: 2017-09-27
    Type: Author supporting evidence, Database references, Derived calculations
  • Version 1.3: 2019-12-04
    Type: Author supporting evidence