2Y9Y

Chromatin Remodeling Factor ISW1a(del_ATPase)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.25 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.283 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure and Mechanism of the Chromatin Remodelling Factor Isw1A.

Yamada, K.Frouws, T.D.Angst, B.Fitzgerald, D.J.Deluca, C.Schimmele, K.Sargent, D.F.Richmond, T.J.

(2011) Nature 472: 448

  • DOI: 10.1038/nature09947
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Site-specific recognition of DNA in eukaryotic organisms depends on the arrangement of nucleosomes in chromatin. In the yeast Saccharomyces cerevisiae, ISW1a and related chromatin remodelling factors are implicated in establishing the nucleosome repe ...

    Site-specific recognition of DNA in eukaryotic organisms depends on the arrangement of nucleosomes in chromatin. In the yeast Saccharomyces cerevisiae, ISW1a and related chromatin remodelling factors are implicated in establishing the nucleosome repeat during replication and altering nucleosome position to affect gene activity. Here we have solved the crystal structures of S. cerevisiae ISW1a lacking its ATPase domain both alone and with DNA bound at resolutions of 3.25 Å and 3.60 Å, respectively, and we have visualized two different nucleosome-containing remodelling complexes using cryo-electron microscopy. The composite X-ray and electron microscopy structures combined with site-directed photocrosslinking analyses of these complexes suggest that ISW1a uses a dinucleosome substrate for chromatin remodelling. Results from a remodelling assay corroborate the dinucleosome model. We show how a chromatin remodelling factor could set the spacing between two adjacent nucleosomes acting as a 'protein ruler'.


    Organizational Affiliation

    ETH Zürich, Institute of Molecular Biology and Biophysics, Schafmattstr. 20, CH-8093 Zürich, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
IMITATION SWITCH PROTEIN 1 (DEL_ATPASE)
A
374Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 5 
Gene Names: ISW1
EC: 3.6.4.-
Find proteins for P38144 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P38144
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ISWI ONE COMPLEX PROTEIN 3
B
624Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 1 
Gene Names: IOC3
Find proteins for P43596 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P43596
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.25 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.283 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 206.971α = 90.00
b = 206.971β = 90.00
c = 215.308γ = 120.00
Software Package:
Software NamePurpose
SCALAdata scaling
SOLOMONphasing
XDSdata reduction
SHARPphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-04-20
    Type: Initial release
  • Version 1.1: 2012-03-28
    Type: Database references, Refinement description, Version format compliance