Structure of a c-Kit Kinase Product Complex

Experimental Data Snapshot

  • Resolution: 2.90 Å
  • R-Value Free: 0.311 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.229 

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Structure of a c-Kit Product Complex Reveals the Basis for Kinase Transactivation.

Mol, C.D.Lim, K.B.Sridhar, V.Zou, H.Chien, E.Y.T.Sang, B.-C.Nowakowski, J.Kassel, D.B.Cronin, C.N.McRee, D.E.

(2003) J Biol Chem 278: 31461-31464

  • DOI: https://doi.org/10.1074/jbc.C300186200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The c-Kit proto-oncogene is a receptor protein-tyrosine kinase associated with several highly malignant human cancers. Upon binding its ligand, stem cell factor (SCF), c-Kit forms an active dimer that autophosphorylates itself and activates a signaling cascade that induces cell growth. Disease-causing human mutations that activate SCF-independent constitutive expression of c-Kit are found in acute myelogenous leukemia, human mast cell disease, and gastrointestinal stromal tumors. We report on the phosphorylation state and crystal structure of a c-Kit product complex. The c-Kit structure is in a fully active form, with ordered kinase activation and phosphate-binding loops. These results provide key insights into the molecular basis for c-Kit kinase transactivation to assist in the design of new competitive inhibitors targeting activated mutant forms of c-Kit that are resistant to current chemotherapy regimes.

  • Organizational Affiliation

    Syrrx, Inc., San Diego, California 92121, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
c-kit protein
A, B
329Homo sapiensMutation(s): 2 
UniProt & NIH Common Fund Data Resources
Find proteins for P10721 (Homo sapiens)
Explore P10721 
Go to UniProtKB:  P10721
GTEx:  ENSG00000157404 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP10721
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on PTR
A, B
Experimental Data & Validation

Experimental Data

  • Resolution: 2.90 Å
  • R-Value Free: 0.311 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.229 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.667α = 90
b = 116.458β = 90
c = 60.066γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-08-12
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2017-08-09
    Changes: Source and taxonomy