Macromolecule Content

• Total Structure Weight: 19.66 kDa 
• Atom Count: 1389 
• Residue Count: 178 
• Unique protein chains: 1

1MK3

SOLUTION STRUCTURE OF HUMAN BCL-W PROTEIN

• DOI: 10.2210/pdb1MK3/pdb

• Classification: APOPTOSIS
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21
• Mutation(s): Yes 


• Deposited: 2002-08-28 Released: 2003-06-03 
• Deposition Author(s): Denisov, A.Y., Madiraju, M.S., Chen, G., Khadir, A., Beauparlant, P., Attardo, G., Shore, G.C., Gehring, K.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 10 
• Selection Criteria: structures with the least restraint violations,structures with the lowest energy 

Literature

Solution structure of human BCL-w: modulation of ligand binding by the C-terminal helix

Denisov, A.Y., Madiraju, M.S., Chen, G., Khadir, A., Beauparlant, P., Attardo, G., Shore, G.C., Gehring, K.

(2003) J Biol Chem 278: 21124-21128

• PubMed: 12651847 
• DOI: 10.1074/jbc.M301798200
• Primary Citation of Related Structures:  
  1MK3


• PubMed Abstract: 
  

The structure of human BCL-w, an anti-apoptotic member of the BCL-2 family, was determined by triple-resonance NMR spectroscopy and molecular modeling. Introduction of a single amino acid substitution (P117V) significantly improved the quality of the NMR spectra obtained. The cytosolic domain of BCL-w consists of 8 alpha-helices, which adopt a fold similar to that of BCL-xL, BCL-2, and BAX proteins. Pairwise root meant square deviation values were less than 3 A for backbone atoms of structurally equivalent regions. Interestingly, the C-terminal helix alpha8 of BCL-w folds into the BH3-binding hydrophobic cleft of the protein, in a fashion similar to the C-terminal transmembrane helix of BAX. A peptide corresponding to the BH3 region of the pro-apoptotic protein, BID, could displace helix alpha8 from the BCL-w cleft, resulting in helix unfolding. Deletion of helix alpha8 increased binding affinities of BCL-w for BAK and BID BH3-peptides, indicating that this helix competes for peptide binding to the hydrophobic cleft. These results suggest that although the cytosolic domain of BCL-w exhibits an overall structure similar to that of BCL-xL and BCL-2, the unique organization of its C-terminal helix may modulate BCL-w interactions with pro-apoptotic binding partners.

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Organizational Affiliation: 

Department of Biochemistry and Montreal Joint Center for Structural Biology, McGill University, Montreal, Quebec H3G 1Y6, Canada.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Apoptosis regulator Bcl-W	A	178	Homo sapiens	Mutation(s): 1  Gene Names: BCL2L2, BCLW, KIAA0271
Find proteins for Q92843 (Homo sapiens) Explore Q92843  Go to UniProtKB:  Q92843
NIH Common Fund Data Resources
PHAROS  Q92843 GTEx  ENSG00000129473GTEx  ENSG00000258643

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 10 
• Selection Criteria: structures with the least restraint violations,structures with the lowest energy 
• OLDERADO: 1MK3 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-08-28 
• Released Date: 2003-06-03 
Deposition Author(s): Denisov, A.Y., Madiraju, M.S., Chen, G., Khadir, A., Beauparlant, P., Attardo, G., Shore, G.C., Gehring, K.

Revision History 

• Version 1.0: 2003-06-03
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance