2O26

Structure of a class III RTK signaling assembly


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.237 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Structural basis for stem cell factor-KIT signaling and activation of class III receptor tyrosine kinases.

Liu, H.Chen, X.Focia, P.J.He, X.

(2007) EMBO J 26: 891-901

  • DOI: 10.1038/sj.emboj.7601545
  • Primary Citation of Related Structures:  
    2O27, 2O26

  • PubMed Abstract: 
  • Stem cell factor (SCF) binds to and activates the KIT receptor, a class III receptor tyrosine kinase (RTK), to stimulate diverse processes including melanogenesis, gametogenesis and hematopoeisis. Dysregulation of KIT activation is associated with many cancers ...

    Stem cell factor (SCF) binds to and activates the KIT receptor, a class III receptor tyrosine kinase (RTK), to stimulate diverse processes including melanogenesis, gametogenesis and hematopoeisis. Dysregulation of KIT activation is associated with many cancers. We report a 2.5 A crystal structure of the functional core of SCF bound to the extracellular ligand-binding domains of KIT. The structure reveals a 'wrapping' SCF-recognition mode by KIT, in which KIT adopts a bent conformation to facilitate each of its first three immunoglobulin (Ig)-like domains to interact with SCF. Three surface epitopes on SCF, an extended loop, the B and C helices, and the N-terminal segment, contact distinct KIT domains, with two of the epitopes undergoing large conformational changes upon receptor binding. The SCF/KIT complex reveals a unique RTK dimerization assembly, and a novel recognition mode between four-helix bundle cytokines and Ig-family receptors. It serves as a framework for understanding the activation mechanisms of class III RTKs.


    Organizational Affiliation

    Department of Molecular Pharmacology and Biological Chemistry, Northwestern University Feinberg School of Medicine, Chicago, IL 60611, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Kit ligandA, B, C [auth E], D [auth F]145Mus musculusMutation(s): 0 
Gene Names: KitlgKitlMgfSlSlf
UniProt
Find proteins for P20826 (Mus musculus)
Explore P20826 
Go to UniProtKB:  P20826
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Mast/stem cell growth factor receptorG [auth U], H [auth W], E [auth X], F [auth Y]290Mus musculusMutation(s): 1 
Gene Names: KitSl
EC: 2.7.10.1
UniProt
Find proteins for P05532 (Mus musculus)
Explore P05532 
Go to UniProtKB:  P05532
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 3
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[beta-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranoseI [auth C], K [auth G], M [auth I], O [auth K]3N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G28454KX
GlyCosmos:  G28454KX
GlyGen:  G28454KX
Entity ID: 4
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseJ [auth D], L [auth H], N [auth J], P [auth L]3N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G62182OO
GlyCosmos:  G62182OO
GlyGen:  G62182OO
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.237 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 76.849α = 90
b = 200.154β = 91.42
c = 82.023γ = 90
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
SOLVEphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-03-13
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Non-polymer description, Structure summary