1G83

CRYSTAL STRUCTURE OF FYN SH3-SH2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.214 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The role of the Src homology 3-Src homology 2 interface in the regulation of Src kinases.

Arold, S.T.Ulmer, T.S.Mulhern, T.D.Werner, J.M.Ladbury, J.E.Campbell, I.D.Noble, M.E.

(2001) J.Biol.Chem. 276: 17199-17205

  • DOI: 10.1074/jbc.M011185200

  • PubMed Abstract: 
  • The regulatory fragment of Src kinases, comprising Src homology (SH) 3 and SH2 domains, is responsible for controlled repression of kinase activity. We have used a multidisciplinary approach involving crystallography, NMR, and isothermal titration ca ...

    The regulatory fragment of Src kinases, comprising Src homology (SH) 3 and SH2 domains, is responsible for controlled repression of kinase activity. We have used a multidisciplinary approach involving crystallography, NMR, and isothermal titration calorimetry to study the regulatory fragment of Fyn (FynSH32) and its interaction with a physiological activator: a fragment of focal adhesion kinase that contains both phosphotyrosine and polyproline motifs. Although flexible, the preferred disposition of SH3 and SH2 domains in FynSH32 resembles the inactive forms of Hck and Src, differing significantly from LckSH32. This difference, which results from variation in the SH3-SH2 linker sequences, will affect the potential of the regulatory fragments to repress kinase activity. This surprising result implies that the mechanism of repression of Src family members may vary, explaining functional distinctions between Fyn and Lck. The interaction between FynSH32 and focal adhesion kinase is restricted to the canonical SH3 and SH2 binding sites and does not affect the dynamic independence of the two domains. Consequently, the interaction shows no enhancement by an avidity effect. Such an interaction may have evolved to gain specificity through an extended recognition site while maintaining rapid dissociation after signaling.


    Organizational Affiliation

    Laboratory of Molecular Biophysics and Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTO-ONCOGENE TYROSINE-PROTEIN KINASE FYN
A, B
165Homo sapiensMutation(s): 3 
Gene Names: FYN
EC: 2.7.10.2
Find proteins for P06241 (Homo sapiens)
Go to Gene View: FYN
Go to UniProtKB:  P06241
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.214 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 39.970α = 90.00
b = 89.960β = 101.44
c = 60.270γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
CCP4data scaling
AMoREphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-05-30
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance