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Transcription of the Drosophila CKI gene dacapo is regulated by a modular array of cis-regulatory sequences

Te-Hui Liu1, Ling Li, Harald Vaessin

  • 1Department of Molecular Genetics, Neurobiotechnology Center, Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210, USA.

Mechanisms of Development
|February 19, 2002
PubMed

Insights

Dacapo (Dap) transcription is regulated by tissue-specific elements and Prospero in the developing nervous system, linking cell cycle arrest to developmental programs.

Area of Science:

  • Developmental Biology
  • Cell Cycle Regulation
  • Genetics

Background:

  • Organogenesis relies on coordinating cell cycle progression with developmental programs.
  • Cip/Kip cyclin-dependent kinase inhibitors (CKIs) are key mediators linking these processes.
  • Dacapo (Dap), a Drosophila CKI, is upregulated before G1 arrest, indicating developmental regulation.

Purpose of the Study:

  • To investigate the transcriptional regulation of Dacapo (dap).
  • To identify cis-regulatory elements controlling dap expression.
  • To understand how developmental programs influence cell cycle progression via Dap.

Main Methods:

  • Analysis of modular cis-regulatory elements controlling dap transcription.
  • Identification of transcription factors regulating dap.
  • Study of Prospero's role in dap regulation within the nervous system.

Main Results:

  • Dap transcription is controlled by modular, tissue-specific cis-regulatory elements.
  • Pan-neural Prospero was identified as a key regulator of dap transcription in the nervous system.
  • This reveals a mechanism linking tissue-specific development to cell cycle control.

Conclusions:

  • Dap expression is precisely regulated by distinct cis-regulatory modules.
  • Prospero integrates developmental cues to control cell cycle arrest via Dap in neural development.
  • This study provides a model for how developmental programs dictate cell cycle progression.

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