1SHD

PEPTIDE INHIBITORS OF SRC SH3-SH2-PHOSPHOPROTEIN INTERACTIONS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Work: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Peptide inhibitors of src SH3-SH2-phosphoprotein interactions.

Gilmer, T.Rodriguez, M.Jordan, S.Crosby, R.Alligood, K.Green, M.Kimery, M.Wagner, C.Kinder, D.Charifson, P.Hassel, A.M.Willard, D.Luther, M.Rusnak, D.Sternbach, D.D.Mehrotra, M.Peel, M.Shampine, L.Davis, R.Robbins, J.Patel, I.R.Kassel, D.Burkhart, W.Moyer, M.Bradshaw, T.Berman, J.

(1994) J.Biol.Chem. 269: 31711-31719


  • PubMed Abstract: 
  • Activated pp60c-src has been implicated in a number of human malignancies including colon carcinoma and breast adenocarcinoma. Association of the src SH2 domain with tyrosine-phosphorylated proteins plays a role in src-mediated signal transduction. I ...

    Activated pp60c-src has been implicated in a number of human malignancies including colon carcinoma and breast adenocarcinoma. Association of the src SH2 domain with tyrosine-phosphorylated proteins plays a role in src-mediated signal transduction. Inhibitors of src SH2 domain-phosphoprotein interactions are, thus, of great interest in defining the role(s) of src in signal transduction pathways. To facilitate such studies, an enzyme-linked immunosorbent assay (ELISA) was developed to detect inhibitors of src SH2-phosphoprotein interactions. This assay measures inhibition of binding of a fusion construct (glutathione S-transferase src SH3-SH2) with autophosphorylated epidermal growth factor receptor tyrosine kinase domain. Activities of phosphopeptide segments derived from potential src SH2 cognate phosphoprotein partners were determined, with the focal adhesion kinase-derived segment VSETDDY*AEIIDE yielding the highest inhibitory activity. Structure activity studies starting from acetyl (Ac)-Y*EEIE have identified Ac-Y*Y*Y*IE as the most active compound screened in the ELISA. This compound is at least 20-fold more active than the parent peptide Ac-Y*EEIE. A high resolution (2 A) crystal structure of human src SH2 complexed with Ac-Y*EEIE was obtained and provided a useful framework for understanding the structure-activity relationships. Additionally, Ac-Y*EEIE was able to block interactions between src and its cellular phosphoprotein partners in vanadate-treated cell lysates from MDA-MB-468 breast carcinoma cells. However, it is unable to abrogate proliferation of MDA-MB-468 cells in culture, presumably because of poor cell penetration and/or lability of the phosphate group on tyrosine.


    Organizational Affiliation

    Glaxo Research Institute, Research Triangle Park, North Carolina 27709.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
C-SRC TYROSINE KINASE SH2 DOMAIN
A
107Homo sapiensMutation(s): 0 
Gene Names: SRC (SRC1)
EC: 2.7.10.2
Find proteins for P12931 (Homo sapiens)
Go to Gene View: SRC
Go to UniProtKB:  P12931
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
TRKA RECEPTOR
B
6N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
PTR
Query on PTR
B
L-PEPTIDE LINKINGC9 H12 N O6 PTYR
ACE
Query on ACE
B
NON-POLYMERC2 H4 O

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External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
PTRΔG: -21.4 kJ/mol (97) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Work: 0.192 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 41.500α = 90.00
b = 44.900β = 90.00
c = 75.600γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 1994-11-10 
  • Released Date: 1995-01-26 
  • Deposition Author(s): Gilmer, T., Jordan, S.

Revision History 

  • Version 1.0: 1995-01-26
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2012-02-22
    Type: Database references