5FMJ

Bcl-xL with mouse Bak BH3 Q75L complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.43 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Physiological Restraint of Bak by Bcl-Xl is Essential for Cell Survival.

Lee, E.F.Grabow, S.Chappaz, S.Dewson, G.Hockings, C.Kluck, R.M.Gray, D.H.Witkowski, M.T.Evangelista, M.Pettikiriarachchi, A.Bouillet, P.Lane, R.M.Czabotar, P.E.Colman, P.M.Smith, B.J.Kile, B.T.Fairlie, W.D.

(2016) Genes Dev 30: 1240

  • DOI: 10.1101/gad.279414.116
  • Primary Citation of Related Structures:  
    5FMI, 5FMK, 5FMJ

  • PubMed Abstract: 
  • Due to the myriad interactions between prosurvival and proapoptotic members of the Bcl-2 family of proteins, establishing the mechanisms that regulate the intrinsic apoptotic pathway has proven challenging. Mechanistic insights have primarily been gl ...

    Due to the myriad interactions between prosurvival and proapoptotic members of the Bcl-2 family of proteins, establishing the mechanisms that regulate the intrinsic apoptotic pathway has proven challenging. Mechanistic insights have primarily been gleaned from in vitro studies because genetic approaches in mammals that produce unambiguous data are difficult to design. Here we describe a mutation in mouse and human Bak that specifically disrupts its interaction with the prosurvival protein Bcl-xL Substitution of Glu75 in mBak (hBAK Q77) for leucine does not affect the three-dimensional structure of Bak or killing activity but reduces its affinity for Bcl-xL via loss of a single hydrogen bond. Using this mutant, we investigated the requirement for physical restraint of Bak by Bcl-xL in apoptotic regulation. In vitro, Bak(Q75L) cells were significantly more sensitive to various apoptotic stimuli. In vivo, loss of Bcl-xL binding to Bak led to significant defects in T-cell and blood platelet survival. Thus, we provide the first definitive in vivo evidence that prosurvival proteins maintain cellular viability by interacting with and inhibiting Bak.


    Organizational Affiliation

    The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia; Department of Medical Biology, The University of Melbourne, Parkville, Victoria 3010, Australia; Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Bundoora, Victoria 3086, Australia; Olivia Newton-John Cancer Research Institute, Heidelberg, Victoria 3084, Australia; School of Cancer Medicine, La Trobe University, Melbourne, Victoria 3084, Australia.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
BCL-2-LIKE PROTEIN 1A158Homo sapiensMutation(s): 0 
Gene Names: BCL2L1BCL2LBCLX
Find proteins for Q07817 (Homo sapiens)
Explore Q07817 
Go to UniProtKB:  Q07817
NIH Common Fund Data Resources
PHAROS  Q07817
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
BAK1 PROTEINB34Mus musculusMutation(s): 1 
Gene Names: Bak1Bak
Find proteins for O08734 (Mus musculus)
Explore O08734 
Go to UniProtKB:  O08734
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

Download CCD File 
A
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.43 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.182 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.789α = 90
b = 57.789β = 90
c = 268.327γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-06-01
    Type: Initial release
  • Version 1.1: 2016-06-08
    Changes: Database references