2C5D

Structure of a minimal Gas6-Axl complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.241 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Basis for Gas6-Axl Signalling.

Sasaki, T.Knyazev, P.G.Clout, N.J.Cheburkin, Y.Goehring, W.Ullrich, A.Timpl, R.Hohenester, E.

(2006) Embo J. 25: 80

  • DOI: 10.1038/sj.emboj.7600912

  • PubMed Abstract: 
  • Receptor tyrosine kinases of the Axl family are activated by the vitamin K-dependent protein Gas6. Axl signalling plays important roles in cancer, spermatogenesis, immunity, and platelet function. The crystal structure at 3.3 A resolution of a minima ...

    Receptor tyrosine kinases of the Axl family are activated by the vitamin K-dependent protein Gas6. Axl signalling plays important roles in cancer, spermatogenesis, immunity, and platelet function. The crystal structure at 3.3 A resolution of a minimal human Gas6/Axl complex reveals an assembly of 2:2 stoichiometry, in which the two immunoglobulin-like domains of the Axl ectodomain are crosslinked by the first laminin G-like domain of Gas6, with no direct Axl/Axl or Gas6/Gas6 contacts. There are two distinct Gas6/Axl contacts of very different size, both featuring interactions between edge beta-strands. Structure-based mutagenesis, protein binding assays and receptor activation experiments demonstrate that both the major and minor Gas6 binding sites are required for productive transmembrane signalling. Gas6-mediated Axl dimerisation is likely to occur in two steps, with a high-affinity 1:1 Gas6/Axl complex forming first. Only the minor Gas6 binding site is highly conserved in the other Axl family receptors, Sky/Tyro3 and Mer. Specificity at the major contact is suggested to result from the segregation of charged and apolar residues to opposite faces of the newly formed beta-sheet.


    Related Citations: 
    • Ligand Recognition and Homophilic Interactions in Tyro3
      Heiring, C.,Dahlback, B.,Muller, Y.A.
      (2004) J.Biol.Chem. 279: 6952
    • Crystal Structure of a C-Terminal Fragment of Growth Arrest-Specific Protein Gas6
      Sasaki, T.,Knyazev, P.G.,Cheburkin, Y.,Goehring, W.,Tisi, D.,Ullrich, A.,Timpl, R.,Hohenester, E.
      (2002) J.Biol.Chem. 277: 44164


    Organizational Affiliation

    Max-Planck-Institut für Biochemie, Martinsried, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GROWTH-ARREST-SPECIFIC PROTEIN 6 PRECURSOR
A, B
422Homo sapiensMutation(s): 0 
Gene Names: GAS6 (AXLLG)
Find proteins for Q14393 (Homo sapiens)
Go to Gene View: GAS6
Go to UniProtKB:  Q14393
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
TYROSINE-PROTEIN KINASE RECEPTOR UFO
C, D
195Homo sapiensMutation(s): 0 
Gene Names: AXL (UFO)
EC: 2.7.10.1
Find proteins for P30530 (Homo sapiens)
Go to Gene View: AXL
Go to UniProtKB:  P30530
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
C
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CA
Query on CA

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Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

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Download CCD File 
A, B
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
NI
Query on NI

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Download CCD File 
C, D
NICKEL (II) ION
Ni
VEQPNABPJHWNSG-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.241 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 292.951α = 90.00
b = 292.951β = 90.00
c = 63.951γ = 120.00
Software Package:
Software NamePurpose
SCALAdata scaling
MOSFLMdata reduction
CNSrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-12-19
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance