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Related Experiment Videos

A screen for modifiers of Deformed function in Drosophila

K W Harding1, G Gellon, N McGinnis

  • 1Department of Molecular Biophysics and Biochemistry, Yale University, New Haven Connecticut 06520-8114, USA.

Genetics
|August 1, 1995
PubMed
Summary

Researchers screened for mutations affecting Drosophila homeotic gene Deformed. They identified new genes, including hedgehog, sallimus, and moira, that interact with Deformed and influence segment identity.

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Area of Science:

  • Developmental Biology
  • Genetics
  • Molecular Biology

Background:

  • Homeotic genes, particularly the Hox family, are crucial for establishing anterior-posterior identity in developing organisms.
  • The signaling pathways and interacting factors that modulate homeotic gene activity remain incompletely understood.

Purpose of the Study:

  • To identify novel genes involved in modulating the function of the Drosophila homeotic gene Deformed.
  • To uncover factors that interact with Deformed to specify segmental identities.

Main Methods:

  • A genetic screen was conducted for second-site mutations that reduce the viability of Drosophila carrying hypomorphic Deformed alleles.
  • Complementation analysis was used to map identified mutations to specific genes.
  • Interactions with the Polycomb gene were also assessed.

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Main Results:

  • Six complementation groups of modifier genes on the third chromosome were identified.
  • Mutations in hedgehog, sallimus, and moira were found to interact with Deformed.
  • Some identified genes, like cap 'n' collar and defaced, specifically interact with Deformed and not Polycomb, showing distinct roles.

Conclusions:

  • The screen successfully identified novel genes that modify Deformed function, providing insights into the regulation of homeotic gene activity.
  • The findings highlight the complex genetic interactions underlying the precise specification of segmental identity in Drosophila development.
  • The identification of genes with specific interactions with Deformed suggests a nuanced regulatory network for Hox gene function.