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Related Experiment Videos

Schnurri interacts with Mad in a Dpp-dependent manner.

Y Udagawa1, J Hanai, K Tada

  • 1Department of Biochemistry, The Cancer Institute of Japanese Foundation for Cancer Research (JFCR), 1-37-1 Kami-ikebukuro, Toshima-ku, Tokyo 170-8455, Japan.

Genes to Cells : Devoted to Molecular & Cellular Mechanisms
|July 11, 2000
PubMed
Summary

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Schnurri (Shn) interacts with Mad protein in a Dpp-dependent manner, suggesting Shn acts as a nuclear component in the Decapentaplegic (Dpp) signaling pathway.

Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Genetics

Background:

  • Decapentaplegic (Dpp) is a TGF-β superfamily member regulating Drosophila development.
  • Dpp signaling involves Mad and Medea Smad proteins transmitting signals to the nucleus.
  • Schnurri (Shn) is a candidate gene downstream of Dpp receptors, its role with Mad was unclear.

Purpose of the Study:

  • To biochemically characterize Schnurri (Shn).
  • To investigate the functional relevance of Shn in the Dpp signaling pathway.
  • To determine if Shn interacts with Mad.

Main Methods:

  • Biochemical characterization of Shn protein functions.
  • Nuclear localization studies for Shn.
  • Co-immunoprecipitation assays to detect Shn-Mad interaction in a Dpp-dependent manner.

Related Experiment Videos

Main Results:

  • Shn forms homo-oligomers and localizes to the nucleus.
  • Shn possesses multiple nuclear localization signals.
  • Shn directly interacts with Mad in a Dpp-dependent manner.

Conclusions:

  • Shn functions as a nuclear component of the Dpp signaling pathway.
  • Direct interaction between Shn and Mad is crucial for Dpp signal transduction.
  • This interaction likely stabilizes DNA binding complexes for transcriptional regulation.