4ANB

Crystal structures of human MEK1 with carboxamide-based allosteric inhibitor XL518 (GDC-0973), or related analogs.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.230 

Starting Model: other
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Ligand Structure Quality Assessment 


This is version 2.2 of the entry. See complete history


Literature

Novel Carboxamide-Based Allosteric Mek Inhibitors: Discovery and Optimization Efforts Toward Xl518 (Gdc-0973)

Rice, K.D.Aay, N.Anand, N.K.Blazey, C.M.Bowles, O.J.Bussenius, J.Costanzo, S.Curtis, J.K.Defina, S.C.Dubenko, L.Engst, S.Joshi, A.A.Kennedy, A.R.Kim, A.I.Koltun, E.S.Lougheed, J.C.Manalo, J.C.L.Martini, J.F.Nuss, J.M.Peto, C.J.Tsang, T.H.Yu, P.Johnston, S.

(2012) ACS Med Chem Lett 3: 416

  • DOI: https://doi.org/10.1021/ml300049d
  • Primary Citation of Related Structures:  
    4AN2, 4AN3, 4AN9, 4ANB

  • PubMed Abstract: 

    The ERK/MAP kinase cascade is a key mechanism subject to dysregulation in cancer and is constitutively activated or highly upregulated in many tumor types. Mutations associated with upstream pathway components RAS and Raf occur frequently and contribute to the oncogenic phenotype through activation of MEK and then ERK. Inhibitors of MEK have been shown to effectively block upregulated ERK/MAPK signaling in a range of cancer cell lines and have further demonstrated early evidence of efficacy in the clinic for the treatment of cancer. Guided by structural insight, a strategy aimed at the identification of an optimal diphenylamine-based MEK inhibitor with an improved metabolism and safety profile versus PD-0325901 led to the discovery of development candidate 1-({3,4-difluoro-2-[(2-fluoro-4-iodophenyl)amino]phenyl}carbonyl)-3-[(2S)-piperidin-2-yl]azetidin-3-ol (XL518, GDC-0973) (1). XL518 exhibits robust in vitro and in vivo potency and efficacy in preclinical models with sustained duration of action and is currently in early stage clinical trials.


  • Organizational Affiliation

    Exelixis Inc. , 210 East Grand Avenue, South San Francisco, California 94080, United States.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DUAL SPECIFICITY MITOGEN-ACTIVATED PROTEIN KINASE KINASE 1301Homo sapiensMutation(s): 3 
EC: 2.7.12.2
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
ACP
Query on ACP

Download Ideal Coordinates CCD File 
C [auth A]PHOSPHOMETHYLPHOSPHONIC ACID ADENYLATE ESTER
C11 H18 N5 O12 P3
UFZTZBNSLXELAL-IOSLPCCCSA-N
YQY
Query on YQY

Download Ideal Coordinates CCD File 
B [auth A][3-(AMINOMETHYL)-3-OXIDANYL-AZETIDIN-1-YL]-[3,4-BIS(FLUORANYL)-2-[(2-FLUORANYL-4-IODANYL-PHENYL)AMINO]PHENYL]METHANONE
C17 H15 F3 I N3 O2
GLTAPZSWBNABCW-UHFFFAOYSA-N
MG
Query on MG

Download Ideal Coordinates CCD File 
D [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
YQY PDBBind:  4ANB IC50: 6.6 (nM) from 1 assay(s)
BindingDB:  4ANB IC50: 6.6 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.230 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 109.001α = 90
b = 109.001β = 90
c = 48.076γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2012-12-19
    Type: Initial release
  • Version 1.1: 2014-06-18
    Changes: Database references
  • Version 2.0: 2018-06-20
    Changes: Advisory, Atomic model, Data collection, Derived calculations
  • Version 2.1: 2019-05-08
    Changes: Data collection, Experimental preparation
  • Version 2.2: 2024-05-01
    Changes: Data collection, Database references, Other, Refinement description