1W4S | pdb_00001w4s

Crystal structure of the proximal BAH domain of polybromo

• PDB DOI: https://doi.org/10.2210/pdb1W4S/pdb

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


• Deposited: 2004-07-28 Released: 2005-04-27 
• Deposition Author(s): Oliver, A.W., Roe, S.M., Pearl, L.H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.55 Å
• R-Value Free: 
  0.230 (Depositor), 0.232 (DCC) 
• R-Value Work: 
  0.199 (Depositor), 0.201 (DCC) 
• R-Value Observed: 
  0.201 (Depositor) 

Literature

Crystal Structure of the Proximal Bah Domain of the Polybromo Protein

Oliver, A.W., Jones, S.A., Roe, S.M., Matthews, S., Goodwin, G.H., Pearl, L.H.

(2005) Biochem J 389: 657

• PubMed: 15839835 
• DOI: https://doi.org/10.1042/BJ20050310
• Primary Citation Related Structures: 
  1W4S


• PubMed Abstract: 
  

  The BAH domain (bromo-associated homology domain) was first identified from a repeated motif found in the nuclear protein polybromo--a large (187 kDa) modular protein comprising six bromodomains, two BAH domains and an HMG box. To date, the BAH domain has no ascribed function, although it is found in a wide range of proteins that contain additional domains involved in either transcriptional regulation (e.g. SET, PHD and bromodomain) and/or DNA binding (HMG box and AT hook). The molecular function of polybromo itself also remains unclear, but it has been identified as a key component of an SWI/SNF (switching/sucrose non-fermenting)-related, ATP-dependent chromatin-remodelling complex PBAF (polybromo, BRG1-associated factors; also known as SWI/SNF-B or SWI/SNFbeta). We present in this paper the crystal structure of the proximal BAH domain from chicken polybromo (BAH1), at a resolution of 1.6 A (1 A=0.1 nm). Structure-based sequence analysis reveals several features that may be involved in mediating protein-protein interactions.

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Organizational Affiliation: 
• CR-UK DNA Repair Enzymes Group, Section of Structural Biology, The Institute of Cancer Research, 237 Fulham Road, Chelsea, London SW3 6JB, UK. [e-mail]

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: 20.36 kDa 
• Atom Count: 1,327 
• Modeled Residue Count: 146 
• Deposited Residue Count: 174 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
POLYBROMO 1 PROTEIN	A	174	Gallus gallus	Mutation(s): 0
UniProt
Find proteins for Q90941 (Gallus gallus) Explore Q90941  Go to UniProtKB:  Q90941

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CL	B [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.55 Å
• R-Value Free:  0.230 (Depositor), 0.232 (DCC) 
• R-Value Work:  0.199 (Depositor), 0.201 (DCC) 
• R-Value Observed: 0.201 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 39.598	α = 90
b = 57.712	β = 90
c = 70.377	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
SHARP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2005-04-27 
Deposition Author(s): Oliver, A.W., Roe, S.M., Pearl, L.H.

Revision History  

• Version 1.0: 2005-04-27
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Advisory, Version format compliance
• Version 1.2: 2024-05-08
  Changes: Data collection, Database references, Other