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CtBP represses Dpp signaling as a dimer.

Caili Bi1, Fei Meng2, Lin Yang3

  • 1Institute of Life Sciences, MOE Key Laboratory of Developmental Genes and Human Diseases, Southeast University, Nanjing 210096, China.

Biochemical and Biophysical Research Communications
|December 12, 2017
PubMed
Summary

Dimerization is essential for C-terminal binding protein's (CtBP) role in repressing the Dpp/BMP signaling pathway during Drosophila development. Mutant CtBP that cannot dimerize loses this repressive function in vivo.

Keywords:
CtBPDimerizationDppDrosophila

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Area of Science:

  • Molecular Biology
  • Developmental Biology
  • Genetics

Background:

  • C-terminal binding protein (CtBP) is a conserved transcriptional co-repressor.
  • CtBP plays critical roles in animal development and human diseases.
  • CtBP is implicated in various signaling pathways, including the Dpp/BMP pathway in Drosophila.

Purpose of the Study:

  • To investigate the role of CtBP dimerization in the repression of Dpp/BMP signaling in Drosophila.
  • To determine if dimerization is a prerequisite for CtBP's function in vivo.

Main Methods:

  • Utilizing Drosophila as a model organism.
  • Employing genetic analysis of wild-type and mutant CtBP.
  • Assessing the influence of CtBP on Dpp signaling in presumptive wing tissues.

Main Results:

  • Wild-type CtBP negatively and dominantly influences Dpp signaling in Drosophila presumptive wings.
  • A mutant CtBP unable to form dimers does not exhibit this repressive effect.
  • Dimerization is demonstrated to be necessary for CtBP's repressive function in this context.

Conclusions:

  • CtBP dimerization is required for its repressive role in the Dpp/BMP signaling pathway.
  • This finding clarifies a key mechanism of CtBP function in developmental processes.
  • Understanding CtBP dimerization is crucial for comprehending its involvement in development and disease.