4IOY

Structure of the Spt16 Middle Domain Reveals Functional Features of the Histone Chaperone FACT


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.177 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of the Spt16 Middle Domain Reveals Functional Features of the Histone Chaperone FACT.

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

(2013) J Biol Chem 288: 10188-10194

  • DOI: 10.1074/jbc.C113.451369
  • Primary Citation of Related Structures:  
    4IOY

  • PubMed Abstract: 
  • The histone chaperone FACT is an essential and abundant heterodimer found in all eukaryotes. Here we report a crystal structure of the middle domain of the large subunit of FACT (Spt16-M) to reveal a double pleckstrin homology architecture. This structure was found previously in the Pob3-M domain of the small subunit of FACT and in the related histone chaperone Rtt106, although Spt16-M is distinguished from these structures by the presence of an extended α-helix and a C-terminal addition ...

    The histone chaperone FACT is an essential and abundant heterodimer found in all eukaryotes. Here we report a crystal structure of the middle domain of the large subunit of FACT (Spt16-M) to reveal a double pleckstrin homology architecture. This structure was found previously in the Pob3-M domain of the small subunit of FACT and in the related histone chaperone Rtt106, although Spt16-M is distinguished from these structures by the presence of an extended α-helix and a C-terminal addition. Consistent with our finding that the double pleckstrin homology structure is common to these three histone chaperones and reports that Pob3 and Rtt106 double pleckstrin homology domains bind histones H3-H4, we also find that Spt16-M binds H3-H4 with low micromolar affinity. Our structure provides a framework for interpreting a large body of genetic data regarding the physiological functions of FACT, including the identification of potential interaction surfaces for binding histones or other proteins.


    Organizational Affiliation

    Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, Utah 84112-5650, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
FACT complex subunit SPT16A [auth X]285Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: SPT16CDC68SSF1YGL207W
Find proteins for P32558 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P32558 
Go to UniProtKB:  P32558
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download Ideal Coordinates CCD File 
B [auth X]PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.177 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 133.978α = 90
b = 133.978β = 90
c = 40.342γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SOLVEphasing
RESOLVEphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
CrystalCleardata collection

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-02-20
    Type: Initial release
  • Version 1.1: 2013-03-06
    Changes: Database references
  • Version 1.2: 2013-05-01
    Changes: Database references