1F1W

SRC SH2 THREF1TRP MUTANT COMPLEXED WITH THE PHOSPHOPEPTIDE S(PTR)VNVQN

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.195 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.6 of the entry. See complete history. 


Literature

Structural basis for specificity switching of the Src SH2 domain.

Kimber, M.S., Nachman, J., Cunningham, A.M., Gish, G.D., Pawson, T., Pai, E.F.

(2000) Mol Cell 5: 1043-1049

  • DOI: https://doi.org/10.1016/s1097-2765(00)80269-5
  • Primary Citation of Related Structures:  
    1F1W, 1F2F

  • PubMed Abstract: 

    The Src SH2 domain binds pYEEI-containing phosphopeptides in an extended conformation with a hydrophobic pocket, which includes ThrEF1, binding Ile(pY +3). Mutating ThrEF1 to tryptophan switches specificity to an Asn(pY +2) requirement, yielding a biological mimic of the Grb2 SH2 domain. Here we show that the Src ThrEF1Trp SH2 domain mutant binds pYVNV phosphopeptides in a beta turn conformation, which, despite differing conformations of the interacting tryptophan, closely resembles the native Grb2/pYVNV cognate peptide binding mode. The ThrEF1Trp substitution therefore switches specificity by physically occluding the pTyr +3 binding pocket and by providing additional interaction surface area for Asn(pY +2). This demonstrates structurally how novel SH2 domain specificities may rapidly evolve through single amino acid substitutions and suggests how new signaling pathways may develop.

    • Organizational Affiliation: 

    Department of Molecular and Medical Genetics, University of Toronto, Ontario, Canada.


Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PROTO-ONCOGENE TYROSINE-PROTEIN KINASE SRC104Gallus gallusMutation(s): 1 
EC: 2.7.1.112 (PDB Primary Data), 2.7.10.2 (UniProt)
UniProt
Find proteins for P00523 (Gallus gallus)
Explore P00523 
Go to UniProtKB:  P00523
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00523
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
S(PTR)VNVQN PHOSPHOPEPTIDE7N/AMutation(s): 0 
Sequence Annotations
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
PTR
Query on PTR
B
L-PEPTIDE LINKINGC9 H12 N O6 PTYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.195 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 33.714α = 90
b = 56.804β = 90
c = 102.779γ = 90
Software Package:
Software NamePurpose
AMoREphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling

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
  • Version 1.3: 2021-11-03
    Changes: Database references, Derived calculations
  • Version 1.4: 2023-08-09
    Changes: Data collection, Refinement description
  • Version 1.5: 2023-11-15
    Changes: Data collection
  • Version 1.6: 2024-10-16
    Changes: Structure summary