6UAN

B-Raf:14-3-3 complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.9 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Cryo-EM structure of a dimeric B-Raf:14-3-3 complex reveals asymmetry in the active sites of B-Raf kinases.

Kondo, Y.Ognjenovic, J.Banerjee, S.Karandur, D.Merk, A.Kulhanek, K.Wong, K.Roose, J.P.Subramaniam, S.Kuriyan, J.

(2019) Science 366: 109-115

  • DOI: 10.1126/science.aay0543

  • PubMed Abstract: 
  • Raf kinases are important cancer drug targets. Paradoxically, many B-Raf inhibitors induce the activation of Raf kinases. Cryo-electron microscopy structural analysis of a phosphorylated B-Raf kinase domain dimer in complex with dimeric 14-3-3, at a ...

    Raf kinases are important cancer drug targets. Paradoxically, many B-Raf inhibitors induce the activation of Raf kinases. Cryo-electron microscopy structural analysis of a phosphorylated B-Raf kinase domain dimer in complex with dimeric 14-3-3, at a resolution of ~3.9 angstroms, shows an asymmetric arrangement in which one kinase is in a canonical "active" conformation. The distal segment of the C-terminal tail of this kinase interacts with, and blocks, the active site of the cognate kinase in this asymmetric arrangement. Deletion of the C-terminal segment reduces Raf activity. The unexpected asymmetric quaternary architecture illustrates how the paradoxical activation of Raf by kinase inhibitors reflects an innate mechanism, with 14-3-3 facilitating inhibition of one kinase while maintaining activity of the other. Conformational modulation of these contacts may provide new opportunities for Raf inhibitor development.


    Related Citations: 
    • Cryo-EM structure of a dimeric B-Raf:14-3-3 complex reveals asymmetry in the active sites of B-Raf kinases
      Kondo, Y.,Ognjenovic, J.,Banerjee, S.,Karandur, D.,Merk, A.,Kulhanek, K.,Wong, K.,Roose, J.P.,Subramaniam, S.,Kuriyan, J.
      (2019) Science --: --


    Organizational Affiliation

    Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, Bethesda, MD 20814, USA.,California Institute for Quantitative Biosciences, University of California, Berkeley, Berkeley, CA 94720, USA.,Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA. kuriyan@berkeley.edu sriram.subramaniam@ubc.ca.,Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA.,Howard Hughes Medical Institute, University of California, Berkeley, Berkeley, CA 94720, USA.,University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada. kuriyan@berkeley.edu sriram.subramaniam@ubc.ca.,Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA.,Department of Anatomy, University of California, San Francisco, San Francisco, CA 94143, USA.,Divisions of Molecular Biophysics and Integrated Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
14-3-3 zeta
A, Z
247Spodoptera lituraMutation(s): 0 
Find proteins for A0A068JLL8 (Spodoptera litura)
Go to UniProtKB:  A0A068JLL8
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein kinase B-raf
B, C
768Homo sapiensMutation(s): 2 
Gene Names: BRAF (BRAF1, RAFB1)
EC: 2.7.11.1
Find proteins for P15056 (Homo sapiens)
Go to Gene View: BRAF
Go to UniProtKB:  P15056
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
B, C
L-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.9 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)United StatesP01-AI091580
Canada Excellence Research Chair AwardCanada--

Revision History 

  • Version 1.0: 2019-09-25
    Type: Initial release
  • Version 1.1: 2019-10-23
    Type: Data collection, Database references
  • Version 1.2: 2019-12-18
    Type: Author supporting evidence