Atrophin controls developmental signaling pathways via interactions with Trithorax-like

Area of Science:

• Developmental Biology
• Genetics
• Molecular Biology

Background:

• Mutations in human Atrophin1 cause neurodegenerative diseases.
• Drosophila Atrophin (Atro) is crucial for development but its targets and partners are poorly understood.

Purpose of the Study:

• To identify direct genomic targets of Atro using ChIP-seq.
• To investigate Atro's role in developmental pathways and its interaction with Trithorax-like (Trl).

Main Methods:

• ChIP-seq to identify Atro binding sites.
• Analysis of Dpp and Notch signaling pathways.
• Bioinformatics, sequential ChIP, and coimmunoprecipitation to study Atro-Trl interaction.

Main Results:

• ChIP-seq identified 1300 direct Atro targets, including engrailed and components of Dpp and Notch signaling.
• Atro regulates Dpp and Notch signaling via thickveins and fringe.
• Atro interacts with Trl and functions as a cofactor to moderate Trl-mediated transcription.

Conclusions:

• Atro is a key cofactor for Trl, modulating developmental gene transcription.
• This work elucidates Atro's function in development and its role in disease-related pathways.