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: 2.40 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.245 
  • R-Value Observed: 0.246 

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Ligand Structure Quality Assessment 


This is version 1.3 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: https://doi.org/10.1038/nsmb859
  • Primary Citation of Related Structures:  
    1S9I, 1S9J

  • 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 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Dual specificity mitogen-activated protein kinase kinase 1341Homo sapiensMutation(s): 0 
Gene Names: MEK1
EC: 2.7.1.37
UniProt & NIH Common Fund Data Resources
Find proteins for Q02750 (Homo sapiens)
Explore Q02750 
Go to UniProtKB:  Q02750
PHAROS:  Q02750
GTEx:  ENSG00000169032 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ02750
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
BBM
Query on BBM

Download Ideal Coordinates CCD File 
D [auth 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
ATP
Query on ATP

Download Ideal Coordinates CCD File 
C [auth A]ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
MG
Query on MG

Download Ideal Coordinates CCD File 
B [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.245 
  • R-Value Observed: 0.246 
  • Space Group: P 62
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.591α = 90
b = 81.591β = 90
c = 129.213γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
CCP4data scaling
CNXphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-11-23
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references, Derived calculations