2E9W

Crystal structure of the extracellular domain of Kit in complex with stem cell factor (SCF)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.245 
  • R-Value Observed: 0.245 

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This is version 1.2 of the entry. See complete history. 


Literature

Structural Basis for Activation of the Receptor Tyrosine Kinase KIT by Stem Cell Factor

Yuzawa, S., Opatowsky, Y., Zhang, Z., Mandiyan, V., Lax, I., Schlessinger, J.

(2007) Cell 130: 323-334

  • DOI: 10.1016/j.cell.2007.05.055
  • Primary Citation of Related Structures:  
    2E9W, 2EC8

  • PubMed Abstract: 

    • Stem Cell Factor (SCF) initiates its multiple cellular responses by binding to the ectodomain of KIT, resulting in tyrosine kinase activation. We describe the crystal structure of the entire ectodomain of KIT before and after SCF stimulation. The str ...

    Stem Cell Factor (SCF) initiates its multiple cellular responses by binding to the ectodomain of KIT, resulting in tyrosine kinase activation. We describe the crystal structure of the entire ectodomain of KIT before and after SCF stimulation. The structures show that KIT dimerization is driven by SCF binding whose sole role is to bring two KIT molecules together. Receptor dimerization is followed by conformational changes that enable lateral interactions between membrane proximal Ig-like domains D4 and D5 of two KIT molecules. Experiments with cultured cells show that KIT activation is compromised by point mutations in amino acids critical for D4-D4 interaction. Moreover, a variety of oncogenic mutations are mapped to the D5-D5 interface. Since key hallmarks of KIT structures, ligand-induced receptor dimerization, and the critical residues in the D4-D4 interface, are conserved in other receptors, the mechanism of KIT stimulation unveiled in this report may apply for other receptor activation.

    Organizational Affiliation: 

    Department of Pharmacology, Yale University School of Medicine, 333 Cedar Street, New Haven, CT 06520, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Mast/stem cell growth factor receptorA, B489Homo sapiensMutation(s): 2 
Gene Names: KIT, SCFR
EC: 2.7.10.1
Find proteins for P10721 (Homo sapiens)
Explore P10721 
Go to UniProtKB:  P10721
NIH Common Fund Data Resources
PHAROS  P10721
GTEx  ENSG00000157404
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Kit ligandC, D141Homo sapiensMutation(s): 0 
Gene Names: SCF, KITLG, MGF
Find proteins for P21583 (Homo sapiens)
Explore P21583 
Go to UniProtKB:  P21583
NIH Common Fund Data Resources
PHAROS  P21583
GTEx  ENSG00000049130
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.50 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.245 
  • R-Value Observed: 0.245 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 269.477α = 90
b = 52.072β = 108
c = 189.791γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-08-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.2: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary