4MNE

Crystal structure of the BRAF:MEK1 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8483 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.185 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the BRAF-MEK Complex Reveals a Kinase Activity Independent Role for BRAF in MAPK Signaling.

Haling, J.R.Sudhamsu, J.Yen, I.Sideris, S.Sandoval, W.Phung, W.Bravo, B.J.Giannetti, A.M.Peck, A.Masselot, A.Morales, T.Smith, D.Brandhuber, B.J.Hymowitz, S.G.Malek, S.

(2014) Cancer Cell 26: 402-413

  • DOI: 10.1016/j.ccr.2014.07.007
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Numerous oncogenic mutations occur within the BRAF kinase domain (BRAF(KD)). Here we show that stable BRAF-MEK1 complexes are enriched in BRAF(WT) and KRAS mutant (MT) cells but not in BRAF(MT) cells. The crystal structure of the BRAF(KD) in a comple ...

    Numerous oncogenic mutations occur within the BRAF kinase domain (BRAF(KD)). Here we show that stable BRAF-MEK1 complexes are enriched in BRAF(WT) and KRAS mutant (MT) cells but not in BRAF(MT) cells. The crystal structure of the BRAF(KD) in a complex with MEK1 reveals a face-to-face dimer sensitive to MEK1 phosphorylation but insensitive to BRAF dimerization. Structure-guided studies reveal that oncogenic BRAF mutations function by bypassing the requirement for BRAF dimerization for activity or weakening the interaction with MEK1. Finally, we show that conformation-specific BRAF inhibitors can sequester a dormant BRAF-MEK1 complex resulting in pathway inhibition. Taken together, these findings reveal a regulatory role for BRAF in the MAPK pathway independent of its kinase activity but dependent on interaction with MEK.


    Organizational Affiliation

    Department of Biochemical and Cellular Pharmacology, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dual specificity mitogen-activated protein kinase kinase 1
A, D, E, H
341Homo sapiensMutation(s): 0 
Gene Names: MAP2K1 (MEK1, PRKMK1)
EC: 2.7.12.2
Find proteins for Q02750 (Homo sapiens)
Go to Gene View: MAP2K1
Go to UniProtKB:  Q02750
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Serine/threonine-protein kinase B-raf
B, C, F, G
308Homo sapiensMutation(s): 0 
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
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
573
Query on 573

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Download CCD File 
A, D, E, H
7-fluoro-3-[(2-fluoro-4-iodophenyl)amino]-N-{[(2S)-2-hydroxypropyl]oxy}furo[3,2-c]pyridine-2-carboxamide
C17 H14 F2 I N3 O4
ZEZHPEIEEFTILY-QMMMGPOBSA-N
 Ligand Interaction
CL
Query on CL

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Download CCD File 
F
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A, D, E, H
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
ACP
Query on ACP

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Download CCD File 
A, D, E, H
PHOSPHOMETHYLPHOSPHONIC ACID ADENYLATE ESTER
ADENOSINE-5'-[BETA, GAMMA-METHYLENE]TRIPHOSPHATE
C11 H18 N5 O12 P3
UFZTZBNSLXELAL-IOSLPCCCSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
573IC50: 35 nM (100) BINDINGDB
573EC50: 4 - 7.2 nM (100) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8483 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.185 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 97.498α = 90.00
b = 135.657β = 90.00
c = 256.059γ = 90.00
Software Package:
Software NamePurpose
ADSCdata collection
PHASERphasing
autoXDSdata reduction
PHENIXrefinement
autoXDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-06-18
    Type: Initial release
  • Version 1.1: 2014-09-03
    Type: Database references
  • Version 1.2: 2014-09-24
    Type: Database references