3WIG

Human MEK1 kinase in complex with CH5126766 and MgAMP-PNP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.215 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Disruption of CRAF-Mediated MEK Activation Is Required for Effective MEK Inhibition in KRAS Mutant Tumors

Lito, P.Saborowski, A.Yue, J.Solomon, M.Joseph, E.Gadal, S.Saborowski, M.Kastenhuber, E.Fellmann, C.Ohara, K.Morikami, K.Miura, T.Lukacs, C.Ishii, N.Lowe, S.Rosen, N.

(2014) Cancer Cell 25: 697-710

  • DOI: 10.1016/j.ccr.2014.03.011

  • PubMed Abstract: 
  • MEK inhibitors are clinically active in BRAF(V600E) melanomas but only marginally so in KRAS mutant tumors. Here, we found that MEK inhibitors suppress ERK signaling more potently in BRAF(V600E), than in KRAS mutant tumors. To understand this, we per ...

    MEK inhibitors are clinically active in BRAF(V600E) melanomas but only marginally so in KRAS mutant tumors. Here, we found that MEK inhibitors suppress ERK signaling more potently in BRAF(V600E), than in KRAS mutant tumors. To understand this, we performed an RNAi screen in a KRAS mutant model and found that CRAF knockdown enhanced MEK inhibition. MEK activated by CRAF was less susceptible to MEK inhibitors than when activated by BRAF(V600E). MEK inhibitors induced RAF-MEK complexes in KRAS mutant models, and disrupting such complexes enhanced inhibition of CRAF-dependent ERK signaling. Newer MEK inhibitors target MEK catalytic activity and also impair its reactivation by CRAF, either by disrupting RAF-MEK complexes or by interacting with Ser 222 to prevent MEK phosphorylation by RAF.


    Organizational Affiliation

    Cancer Biology and Genetics Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA; Howard Hughes Medical Institute, New York, NY 10065, USA. Electronic address: lowes@mskcc.org.,Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.,Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA; Molecular Pharmacology and Chemistry Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA. Electronic address: rosenn@mskcc.org.,Roche Research Center, Hoffmann-La Roche, Nutley, NJ 07110, USA.,Cancer Biology and Genetics Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA.,Molecular Pharmacology and Chemistry Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA.,Research Division, Chugai Pharmaceutical, Kamakura, 247-8530, Japan.,Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA; Molecular Pharmacology and Chemistry Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dual specificity mitogen-activated protein kinase kinase 1
A
307Homo 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
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CHU
Query on CHU

Download SDF File 
Download CCD File 
A
N-(3-fluoro-4-{[4-methyl-2-oxo-7-(pyrimidin-2-yloxy)-2H-chromen-3-yl]methyl}pyridin-2-yl)-N'-methylsulfuric diamide
CH5126766
C21 H18 F N5 O5 S
LMMJFBMMJUMSJS-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

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Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
ANP
Query on ANP

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Download CCD File 
A
PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
C10 H17 N6 O12 P3
PVKSNHVPLWYQGJ-KQYNXXCUSA-N
 Ligand Interaction
PG4
Query on PG4

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Download CCD File 
A
TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.215 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 136.366α = 90.00
b = 136.366β = 90.00
c = 59.764γ = 120.00
Software Package:
Software NamePurpose
DENZOdata reduction
MOLREPphasing
PDB_EXTRACTdata extraction
CNXrefinement
SCALEPACKdata scaling
CNSrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-06-04
    Type: Initial release
  • Version 1.1: 2017-08-16
    Type: Refinement description, Source and taxonomy
  • Version 1.2: 2017-11-22
    Type: Refinement description