Humanized Flies and Resources for Cross-Species Study.

Area of Science:

• Genomics
• Molecular Biology
• Developmental Biology

Background:

• Whole-genome sequencing advances gene and genome understanding.
• Predicting missense mutation pathogenicity and noncoding variant impact remains challenging.
• Understanding variant interactions in phenotype expression is a key question.

Purpose of the Study:

• To introduce powerful Drosophila genetic tools for functional genomics.
• To facilitate cross-species functional analysis of human genes and regulatory elements.
• To encourage wider use of Drosophila for investigating gene function and regulation.

Main Methods:

• Utilizing Drosophila's genetic toolkit for replacing endogenous genes with exogenous DNA.
• Generating transgenic fly lines with human ultra-conserved elements for enhancer reporter assays.
• Developing transgenic human-ORF lines for GAL4/UAS-driven gene expression.

Main Results:

• Demonstrated the utility of Drosophila for direct comparison of orthologs, variants, and fragments.
• Observed reporter expression in transgenic fly tissues for all tested human ultra-conserved elements.
• Highlighted the potential for cross-species functional genomics using Drosophila.

Conclusions:

• Drosophila provides a powerful and accessible platform for functional genomics research.
• The developed tools facilitate the study of gene regulation and variant pathogenicity.
• These resources are valuable for nonspecialists seeking to explore gene function across species.