1OFC

nucleosome recognition module of ISWI ATPase

• PDB DOI:  https://doi.org/10.2210/pdb1OFC/pdb

• Classification: NUCLEAR PROTEIN
• Organism(s): Drosophila melanogaster
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2003-04-10 Released: 2003-09-05 
• Deposition Author(s): Grune, T., Muller, C.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.253 
• R-Value Work: 0.218 
• R-Value Observed: 0.219 

Literature

Crystal Structure and Functional Analysis of a Nucleosome Recognition Module of the Remodeling Factor Iswi

Grune, T., Brzeski, J., Eberharter, A., Clapier, C.R., Corona, D.F.V., Becker, P.B., Muller, C.W.

(2003) Mol Cell 12: 449

• PubMed: 14536084 
• DOI: https://doi.org/10.1016/s1097-2765(03)00273-9
• Primary Citation of Related Structures:  
  1OFC


• PubMed Abstract: 
  

Energy-dependent nucleosome remodeling emerges as a key process endowing chromatin with dynamic properties. However, the principles by which remodeling ATPases interact with their nucleosome substrate to alter histone-DNA interactions are only poorly understood. We have identified a substrate recognition domain in the C-terminal half of the remodeling ATPase ISWI and determined its structure by X-ray crystallography. The structure comprises three domains, a four-helix domain with a novel fold and two alpha-helical domains related to the modules of c-Myb, SANT and SLIDE, which are linked by a long helix. An integrated structural and functional analysis of these domains provides insight into how ISWI interacts with the nucleosomal substrate.

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Organizational Affiliation: 

European Molecular Biology Laboratory, Grenoble Outstation, B.P. 181, F 38042 Grenoble 9, France.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 36.32 kDa 
• Atom Count: 2,291 
• Modelled Residue Count: 267 
• Deposited Residue Count: 304 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ISWI PROTEIN	A [auth X]	304	Drosophila melanogaster	Mutation(s): 0  Gene Names: Iswi, CG8625 EC: 3.6.4
UniProt
Find proteins for Q24368 (Drosophila melanogaster) Explore Q24368  Go to UniProtKB:  Q24368

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GLC	B [auth X]	alpha-D-glucopyranose C6 H12 O6 WQZGKKKJIJFFOK-DVKNGEFBSA-N
G4D	C [auth X]	4-deoxy-alpha-D-glucopyranose C6 H12 O5 HDEMQQHXNOJATE-AZGQCCRYSA-N
GOL	D [auth X]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.253 
• R-Value Work: 0.218 
• R-Value Observed: 0.219 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 109.47	α = 90
b = 66.34	β = 124.41
c = 82.83	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling
SOLVE	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2003-09-05 
Deposition Author(s): Grune, T., Muller, C.W.

Revision History  

• Version 1.0: 2003-09-05
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Data collection, Derived calculations, Structure summary