1EXZ

STRUCTURE OF STEM CELL FACTOR

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.223 

wwPDB Validation   3D Report Full Report


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


Literature

Crystal structure of human stem cell factor: implication for stem cell factor receptor dimerization and activation.

Zhang, Z., Zhang, R., Joachimiak, A., Schlessinger, J., Kong, X.P.

(2000) Proc Natl Acad Sci U S A 97: 7732-7737

  • DOI: 10.1073/pnas.97.14.7732
  • Primary Citation of Related Structures:  
    1EXZ

  • PubMed Abstract: 

    • Stem cell factor (SCF) plays important roles in hematopoiesis and the survival, proliferation, and differentiation of mast cells, melanocytes, and germ cells. SCF mediates its biological effects by binding to and activating a receptor tyrosine kinase designated c-kit or SCF receptor ...

    Stem cell factor (SCF) plays important roles in hematopoiesis and the survival, proliferation, and differentiation of mast cells, melanocytes, and germ cells. SCF mediates its biological effects by binding to and activating a receptor tyrosine kinase designated c-kit or SCF receptor. In this report we describe the 2.3-A crystal structure of the functional core of recombinant human SCF. SCF is a noncovalent homodimer composed of two slightly wedged protomers. Each SCF protomer exhibits an antiparallel four-helix bundle fold. Dimerization is mediated by extensive polar and nonpolar interactions between the two protomers with a large buried surface area. Finally, we have identified a hydrophobic crevice and a charged region at the tail of each protomer that functions as a potential receptor-binding site. On the basis of these observations, a model for SCF small middle dotc-kit complex formation and dimerization is proposed.

    Organizational Affiliation: 

    Departments of Pharmacology and Biochemistry and Skirball Institute, New York University School of Medicine, 550 First Avenue, New York, NY 10016, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
STEM CELL FACTORA, B, C, D141Homo sapiensMutation(s): 0 
Gene Names: KITLG, MGF, SCF
UniProt & NIH Common Fund Data Resources
Find proteins for P21583 (Homo sapiens)
Explore P21583 
Go to UniProtKB:  P21583
PHAROS:  P21583
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP21583
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SM
Query on SM
Download Ideal Coordinates CCD File 
F [auth B],
G [auth B],
H [auth C],
I [auth C]		SAMARIUM (III) ION
Sm
DOSGOCSVHPUUIA-UHFFFAOYSA-N		 Ligand Interaction
TRS
Query on TRS
Download Ideal Coordinates CCD File 
K [auth D]2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL
C4 H12 N O3
LENZDBCJOHFCAS-UHFFFAOYSA-O		 Ligand Interaction
CA
Query on CA
Download Ideal Coordinates CCD File 
E [auth A],
J [auth C]		CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.223 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 36.154α = 90
b = 87.526β = 97.76
c = 79.434γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASESphasing
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-07-06
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance