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Related Experiment Videos

Functional domains in the Deformed protein

A Zhu1, M A Kuziora

  • 1Department of Biological Sciences, University of Pittsburgh, PA 15260, USA.

Development (Cambridge, England)
|May 1, 1996
PubMed
Summary

Investigating the Deformed/Abdominal-B (Dfd/Abd-B) chimeric protein revealed that its N domain drives transcriptional activity. The acidic and C-tail domains modulate this activity, impacting homeotic gene regulation.

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Area of Science:

  • Developmental Biology
  • Genetics
  • Molecular Biology

Background:

  • Homeotic genes are crucial for body plan development.
  • The Deformed (Dfd) and Abdominal-B (Abd-B) proteins are key regulators in this process.
  • Understanding regulatory domains is essential for deciphering gene control.

Purpose of the Study:

  • To identify regulatory domains outside the homeodomain in a Dfd/Abd-B chimera.
  • To investigate how these domains influence in vivo regulatory activity.
  • To determine the role of specific domains in transcriptional activation and repression.

Main Methods:

  • Generation of a Deformed/Abdominal-B (Dfd/Abd-B) chimeric protein.
  • Creation and testing of a series of deletion mutants.
  • Assay of regulatory activity using promoter elements of empty spiracles and Distal-less genes.

Main Results:

  • Deletion of acidic and C-tail regions shifted Dfd/Abd-B chimera from activator to repressor for Distal-less, with minimal effect on empty spiracles.
  • Mutant constructs lacking the N domain showed no regulatory activity.
  • The N domain alone, when fused to a heterologous DNA binding domain, exhibited significant activation activity.

Conclusions:

  • The N domain is the primary driver of transcriptional activation in the Dfd/Abd-B chimera.
  • The acidic and C-tail domains act as modulators of the N domain's transcriptional activity.
  • These findings provide insights into the modular regulation of homeotic gene expression.

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