6CKV

Solution NMR structure of human BOK


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the least restraint violations 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Intrinsic Instability of BOK Enables Membrane Permeabilization in Apoptosis.

Zheng, J.H.Grace, C.R.Guibao, C.D.McNamara, D.E.Llambi, F.Wang, Y.M.Chen, T.Moldoveanu, T.

(2018) Cell Rep 23: 2083-2094.e6

  • DOI: 10.1016/j.celrep.2018.04.060
  • Primary Citation of Related Structures:  
    6CKV

  • PubMed Abstract: 
  • The effector B cell lymphoma-2 (BCL-2) protein BCL-2 ovarian killer (BOK) induces mitochondrial outer membrane permeabilization (MOMP) to initiate apoptosis upon inhibition of the proteasome. How BOK mediates MOMP is mechanistically unknown. The NMR structure of the BCL-2 core of human BOK reveals a conserved architecture with an atypical hydrophobic groove that undergoes conformational exchange ...

    The effector B cell lymphoma-2 (BCL-2) protein BCL-2 ovarian killer (BOK) induces mitochondrial outer membrane permeabilization (MOMP) to initiate apoptosis upon inhibition of the proteasome. How BOK mediates MOMP is mechanistically unknown. The NMR structure of the BCL-2 core of human BOK reveals a conserved architecture with an atypical hydrophobic groove that undergoes conformational exchange. Remarkably, the BCL-2 core of BOK spontaneously associates with purified mitochondria to release cytochrome c in MOMP assays. Alanine substitution of a unique glycine in helix α1 stabilizes BOK, as shown by thermal shift and urea denaturation analyses, and significantly inhibits MOMP, liposome permeabilization, and cell death. Activated BID does not activate WT BOK or the stabilized alanine mutant to promote cell death. We propose that BOK-mediated membrane permeabilization is governed in part by its unique metastability of the hydrophobic groove and helix α1 and not through activation by BH3 ligands.


    Organizational Affiliation

    Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA; Department of Chemical Biology and Therapeutics, St. Jude Children's Research Hospital, Memphis, TN 38105, USA. Electronic address: tudor.moldoveanu@stjude.org.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Bcl-2-related ovarian killer proteinA158Homo sapiensMutation(s): 4 
Gene Names: BOKBCL2L9
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UMX3 (Homo sapiens)
Explore Q9UMX3 
Go to UniProtKB:  Q9UMX3
PHAROS:  Q9UMX3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UMX3
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the least restraint violations 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Cancer Institute (NIH/NCI)United StatesP30CA021765-36

Revision History  (Full details and data files)

  • Version 1.0: 2018-05-09
    Type: Initial release
  • Version 1.1: 2018-05-23
    Changes: Data collection, Database references, Structure summary
  • Version 1.2: 2018-07-04
    Changes: Data collection, Database references
  • Version 1.3: 2019-12-04
    Changes: Author supporting evidence, Data collection