A genome-engineered tool set for Drosophila TGF-β/BMP signaling studies

Area of Science:

• Developmental Biology
• Molecular Biology
• Genetics

Background:

• Transforming growth factor-beta (TGF-β)/bone morphogenetic protein (BMP) superfamily ligands regulate critical developmental processes like growth, patterning, and organogenesis.
• Understanding the spatiotemporal dynamics and regulation of TGF-β/BMP signaling requires tools that can monitor and manipulate pathway components at physiological levels.
• Existing tools often lack the precision to study endogenous pathway activity within its natural context.

Purpose of the Study:

• To create a comprehensive toolkit for analyzing the Drosophila BMP and Activin signaling pathways.
• To enable monitoring and manipulation of pathway components at endogenous expression levels and spatiotemporal patterns.
• To facilitate in locus structure-function and cis-regulatory analyses of signaling components.

Main Methods:

• Genome engineering to generate endogenously epitope- or fluorescent-tagged versions of key Drosophila BMP and Activin pathway components (receptors, co-receptors, transcription factors, feedback regulators).
• Validation of the biological activity and utility of the generated alleles for assessing protein distribution.
• Development of complementary protein binder-based tools for visualization and manipulation of tagged proteins.

Main Results:

• A comprehensive library of biologically active, endogenously tagged alleles for Drosophila BMP and Activin signaling pathways was successfully generated.
• The generated alleles allow for accurate assessment of protein tissue and subcellular distribution.
• The genomic platforms support in locus structure-function and cis-regulatory analyses.
• Novel protein binder tools enable visualization and manipulation of protein stability and localization.

Conclusions:

• The developed genome-engineered alleles and protein binder tools provide powerful new resources for studying TGF-β/BMP signaling.
• These tools facilitate a deeper understanding of signaling dynamics, regulation, and function in vivo.
• The toolkit advances research in developmental biology, organogenesis, and potentially related disease mechanisms.