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Co-immunoprecipitation Assay for Studying Functional Interactions Between Receptors and Enzymes
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The SH2 domain interaction landscape.

Michele Tinti1, Lars Kiemer, Stefano Costa

  • 1Department of Biology, University of Rome Tor Vergata, I-00133 Rome, Italy.

Cell Reports
|April 3, 2013
PubMed
Summary
This summary is machine-generated.

Researchers mapped SH2 domain interactions with tyrosine phosphopeptides using peptide chip technology. This created a network of thousands of interactions, revealing new insights into signal transduction pathways.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Systems Biology

Background:

  • SH2 domains are critical signaling proteins that bind to phosphorylated tyrosine residues.
  • Each SH2 domain exhibits specific sequence preferences for these binding interactions.
  • Understanding these interactions is key to deciphering complex cellular signaling networks.

Purpose of the Study:

  • To comprehensively map the binding affinities of SH2 domains to tyrosine phosphopeptides.
  • To construct a probabilistic interaction network of SH2-mediated signaling.
  • To provide a publicly accessible database of these interactions.

Main Methods:

  • Development and application of high-density peptide chip technology.
  • Probing affinities of over 70 SH2 domains against a large set of human phosphopeptides.
  • Integration of experimental data with orthogonal context-specific information.

Main Results:

  • Identification of thousands of putative SH2-peptide interactions.
  • Assembly of an SH2-mediated probabilistic interaction network.
  • Creation of the PepspotDB database as a community resource.
  • Validation of a predicted interaction between SHP2 and ERK in living cells.

Conclusions:

  • Peptide chip technology enables large-scale mapping of SH2 domain interactions.
  • The generated interaction network provides valuable insights into signal transduction.
  • The PepspotDB database serves as a crucial resource for researchers studying SH2 domains.