Biological Assembly 1  

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

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 4-mer - A2B2 

Local Symmetry: Cyclic - C2  (3D View)
Local Stoichiometry: Homo 2-mer - A2 Local Symmetry: Cyclic - C2  (3D View)
Local Stoichiometry: Homo 2-mer - B2 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 225.78 kDa 
• Atom Count: 7685 
• Modelled Residue Count: 1007 
• Deposited Residue Count: 2030 
• Unique protein chains: 2

6UAN

B-Raf:14-3-3 complex

• PDB DOI: 10.2210/pdb6UAN/pdb
• EM Map EMD-20708:EMDBEMDataResource

• Classification: SIGNALING PROTEIN
• Organism(s): Spodoptera aff. frugiperda 1 BOLD-2017, Homo sapiens
• Expression System: Spodoptera aff. frugiperda 1 BOLD-2017
• Mutation(s): Yes 


• Deposited: 2019-09-11 Released: 2019-09-25 
• Deposition Author(s): Kondo, Y., Ognjenovic, J., Banerjee, S., Karandur, D., Merk, A., Kulhanek, K., Wong, K., Roose, J.P., Subramaniam, S., Kuriyan, J.
• Funding Organization(s): National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI), Canada Excellence Research Chair Award

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.90 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

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

• PubMed: 31604311 
• DOI: 10.1126/science.aay0543
• Primary Citation of Related Structures:  
  6UAN


• 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 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.

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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 --: --

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Organizational Affiliation: 

Divisions of Molecular Biophysics and Integrated Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
14-3-3 zeta	A, B [auth Z]	247	Spodoptera aff. frugiperda 1 BOLD-2017	Mutation(s): 0
UniProt
Find proteins for A0A068JLL8 (Spodoptera litura) Explore A0A068JLL8  Go to UniProtKB:  A0A068JLL8

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Serine/threonine-protein kinase B-raf	C [auth B], D [auth C]	768	Homo sapiens	Mutation(s): 2  Gene Names: BRAF, BRAF1, RAFB1 EC: 2.7.11.1
UniProt & NIH Common Fund Data Resources
Find proteins for P15056 (Homo sapiens) Explore P15056  Go to UniProtKB:  P15056
PHAROS:  P15056 GTEx:  ENSG00000157764

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
SEP	C [auth B], D [auth C]	L-PEPTIDE LINKING	C3 H8 N O6 P		SER

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.90 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2019-09-11 
• Released Date: 2019-09-25 
Deposition Author(s): Kondo, Y., Ognjenovic, J., Banerjee, S., Karandur, D., Merk, A., Kulhanek, K., Wong, K., Roose, J.P., Subramaniam, S., Kuriyan, J.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)	United States	P01-AI091580
Canada Excellence Research Chair Award	Canada	--

Revision History  

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