Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 20.15 kDa 
• Atom Count: 1410 
• Modelled Residue Count: 178 
• Deposited Residue Count: 178 
• Unique protein chains: 1

2EZY

SOLUTION STRUCTURE OF HUMAN BARRIER-TO-AUTOINTEGRATION FACTOR BAF, NMR, ENSEMBLE OF 20 SIMULATED ANNEALING STRUCTURES

• PDB DOI: 10.2210/pdb2EZY/pdb

• Classification: DNA BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1998-07-26 Released: 1999-01-13 
• Deposition Author(s): Clore, G.M., Cai, M., Gronenborn, A.M.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 40 
• Conformers Submitted: 20 

Literature

Solution structure of the cellular factor BAF responsible for protecting retroviral DNA from autointegration.

Cai, M., Huang, Y., Zheng, R., Wei, S.Q., Ghirlando, R., Lee, M.S., Craigie, R., Gronenborn, A.M., Clore, G.M.

(1998) Nat Struct Biol 5: 903-909

• PubMed: 9783751 
• DOI: 10.1038/2345
• Primary Citation of Related Structures:  
  2EZX, 2EZY, 2EZZ


• PubMed Abstract: 
  

The solution structure of the human barrier-to-autointegration factor, BAF, a 21,000 Mr dimer, has been solved by NMR, including extensive use of dipolar couplings which provide a priori long range structural information. BAF is a highly evolutionarily conserved DNA binding protein that is responsible for inhibiting autointegration of retroviral DNA, thereby promoting integration of retroviral DNA into the host chromosome. BAF is largely helical, and each subunit is composed of five helices. The dimer is elongated in shape and the dimer interface comprises principally hydrophobic contacts supplemented by a single salt bridge. Despite the absence of any sequence similarity to any other known protein family, the topology of helices 3-5 is similar to that of a number of DNA binding proteins, with helices 4 and 5 constituting a helix-turn-helix motif. A model for the interaction of BAF with DNA that is consistent with structural and mutagenesis data is proposed.

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Organizational Affiliation: 

Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892-0520, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
BARRIER-TO-AUTOINTEGRATION FACTOR	A, B	89	Homo sapiens	Mutation(s): 0  Gene Names: BANF1, BAF, BCRG1
UniProt & NIH Common Fund Data Resources
Find proteins for O75531 (Homo sapiens) Explore O75531  Go to UniProtKB:  O75531
PHAROS:  O75531 GTEx:  ENSG00000175334

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 40 
• Conformers Submitted: 20 
• OLDERADO: 2EZY Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1998-07-26 
• Released Date: 1999-01-13 
Deposition Author(s): Clore, G.M., Cai, M., Gronenborn, A.M.

Revision History  

• Version 1.0: 1999-01-13
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2022-03-09
  Changes: Database references, Derived calculations, Structure summary