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Ccd1, a novel protein with a DIX domain, is a positive regulator in the Wnt signaling during zebrafish neural

Kensuke Shiomi1, Hiroshi Uchida, Kazuko Keino-Masu

  • 1Department of Molecular Neurobiology, Institute of Basic Medical Sciences, University of Tsukuba, 1-1-1 Tennoudai, 305-8575, Tsukuba, Ibaraki, Japan.

Current Biology : CB
|January 16, 2003
PubMed

Insights

Researchers discovered Ccd1, a novel gene regulating Wnt signaling. Ccd1 acts as a positive regulator in zebrafish neural patterning, influencing cell growth and differentiation.

Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Genetics

Background:

  • Wnt signaling is vital for cell differentiation, polarity, and growth.
  • The canonical Wnt pathway involves Dishevelled (Dvl) and beta-catenin, ultimately activating TCF/LEF transcription factors.
  • DIX domains are critical for Wnt pathway mediators like Dvl and Axin.

Purpose of the Study:

  • To identify and characterize a novel gene involved in Wnt signaling in zebrafish.
  • To elucidate the role of Ccd1 in neural patterning and Wnt pathway regulation.

Main Methods:

  • Identification of a novel zebrafish gene, Ccd1, containing a DIX domain.
  • Analysis of Ccd1's interaction with Dvl and Axin in vitro.
  • Overexpression and dominant-negative studies of Ccd1 in zebrafish embryos.
  • Assessment of Ccd1's effect on Wnt-mediated phenotypes and gene expression.

Main Results:

  • Ccd1 forms complexes with Dvl and Axin, activating TCF-dependent transcription.
  • Overexpression of Ccd1 in zebrafish embryos caused posteriorization (reduced eye and forebrain size).
  • Ccd1 functions downstream of Wnt receptors and upstream of Axin in the Wnt pathway.

Conclusions:

  • Ccd1 is a novel positive regulator of Wnt signaling in zebrafish neural patterning.
  • Ccd1 plays a significant role in embryonic development and tissue patterning.
  • Understanding Ccd1's function provides new insights into Wnt pathway mechanisms.

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