1S9J

X-ray structure of the human mitogen-activated protein kinase kinase 1 (MEK1) in a complex with ligand and MgATP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.245 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structures of human MAP kinase kinase 1 (MEK1) and MEK2 describe novel noncompetitive kinase inhibition.

Ohren, J.F.Chen, H.Pavlovsky, A.Whitehead, C.Zhang, E.Kuffa, P.Yan, C.McConnell, P.Spessard, C.Banotai, C.Mueller, W.T.Delaney, A.Omer, C.Sebolt-Leopold, J.Dudley, D.T.Leung, I.K.Flamme, C.Warmus, J.Kaufman, M.Barrett, S.Tecle, H.Hasemann, C.A.

(2004) Nat.Struct.Mol.Biol. 11: 1192-1197

  • DOI: 10.1038/nsmb859
  • Primary Citation of Related Structures:  
  • Also Cited By: 3EQB, 3DY7

  • PubMed Abstract: 
  • MEK1 and MEK2 are closely related, dual-specificity tyrosine/threonine protein kinases found in the Ras/Raf/MEK/ERK mitogen-activated protein kinase (MAPK) signaling pathway. Approximately 30% of all human cancers have a constitutively activated MAPK ...

    MEK1 and MEK2 are closely related, dual-specificity tyrosine/threonine protein kinases found in the Ras/Raf/MEK/ERK mitogen-activated protein kinase (MAPK) signaling pathway. Approximately 30% of all human cancers have a constitutively activated MAPK pathway, and constitutive activation of MEK1 results in cellular transformation. Here we present the X-ray structures of human MEK1 and MEK2, each determined as a ternary complex with MgATP and an inhibitor to a resolution of 2.4 A and 3.2 A, respectively. The structures reveal that MEK1 and MEK2 each have a unique inhibitor-binding pocket adjacent to the MgATP-binding site. The presence of the potent inhibitor induces several conformational changes in the unphosphorylated MEK1 and MEK2 enzymes that lock them into a closed but catalytically inactive species. Thus, the structures reported here reveal a novel, noncompetitive mechanism for protein kinase inhibition.


    Organizational Affiliation

    Department of Discovery Technologies, Pfizer Global Research & Development, 2800 Plymouth Road, Ann Arbor, Michigan 48105, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dual specificity mitogen-activated protein kinase kinase 1
A
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
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ATP
Query on ATP

Download SDF File 
Download CCD File 
A
ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
BBM
Query on BBM

Download SDF File 
Download CCD File 
A
5-BROMO-N-(2,3-DIHYDROXYPROPOXY)-3,4-DIFLUORO-2-[(2-FLUORO-4-IODOPHENYL)AMINO]BENZAMIDE
C16 H13 Br F3 I N2 O4
XXSSGBYXSKOLAM-QMMMGPOBSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.245 
  • Space Group: P 62
Unit Cell:
Length (Å)Angle (°)
a = 81.591α = 90.00
b = 81.591β = 90.00
c = 129.213γ = 120.00
Software Package:
Software NamePurpose
CNXphasing
REFMACrefinement
CCP4data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-11-23
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance