3O8Z

Crystal structure of Spn1 (Iws1) core domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.187 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure and biological importance of the spn1-spt6 interaction, and its regulatory role in nucleosome binding.

McDonald, S.M.Close, D.Xin, H.Formosa, T.Hill, C.P.

(2010) Mol Cell 40: 725-735

  • DOI: 10.1016/j.molcel.2010.11.014
  • Primary Citation of Related Structures:  
    3O8Z, 3OAK

  • PubMed Abstract: 
  • Eukaryotic transcription and mRNA processing depend upon the coordinated interactions of many proteins, including Spn1 and Spt6, which are conserved across eukaryotes, are essential for viability, and associate with each other in some of their biological ...

    Eukaryotic transcription and mRNA processing depend upon the coordinated interactions of many proteins, including Spn1 and Spt6, which are conserved across eukaryotes, are essential for viability, and associate with each other in some of their biologically important contexts. Here we report crystal structures of the Spn1 core alone and in complex with the binding determinant of Spt6. Mutating interface residues greatly diminishes binding in vitro and causes strong phenotypes in vivo, including a defect in maintaining repressive chromatin. Overexpression of Spn1 partially suppresses the defects caused by an spt6 mutation affecting the Spn1 interface, indicating that the Spn1-Spt6 interaction is important for managing chromatin. Spt6 binds nucleosomes directly in vitro, and this interaction is blocked by Spn1, providing further mechanistic insight into the function of the interaction. These data thereby reveal the structural and biochemical bases of molecular interactions that function in the maintenance of chromatin structure.


    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Transcription factor IWS1 A152Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: IWS1SPN1YPR133C
Find proteins for Q06505 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q06505 
Go to UniProtKB:  Q06505
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download Ideal Coordinates CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.224 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.187 
  • Space Group: P 32 1 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.325α = 90
b = 61.325β = 90
c = 116.05γ = 120
Software Package:
Software NamePurpose
SCALEPACKdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
CrystalCleardata collection
DENZOdata reduction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-11-24
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2011-11-16
    Changes: Atomic model
  • Version 1.3: 2017-11-08
    Changes: Refinement description