Techniques for analyzing gene expression using BAC-based reporter constructs.

Area of Science:

• Molecular Biology
• Genomics
• Developmental Biology

Background:

• Characterizing complex gene regulation often requires analyzing extensive genomic regions.
• Bacterial artificial chromosomes (BACs) are essential for supporting large DNA fragments (up to 300kb) and serve as stable experimental platforms.

Purpose of the Study:

• To present protocols for engineering BACs as reporter constructs for gene expression studies.
• To detail methods for identifying BAC clones, modifying them, and preparing DNA for microinjection in transgenic systems.

Main Methods:

• Utilizing phage-based homologous recombination for efficient BAC engineering.
• Developing protocols for BAC clone identification, modification, and DNA preparation for microinjection.
• Employing fluorescent protein reporters for high-resolution in vivo microscopy and lineage tracing.

Main Results:

• Demonstrated the utility of engineered BACs for various applications, including delineating gene expression boundaries, tracing cell lineages, and perturbing protein function.
• Provided adaptable protocols for use in echinoderm embryos and larvae, applicable to other transgenic systems.
• Highlighted the expanding potential of recombinant BACs with advancements in fluorescent protein technology.

Conclusions:

• Engineered BACs provide a powerful and versatile platform for investigating gene regulation and function in transgenic models.
• The presented protocols offer a robust framework for creating reporter constructs and facilitating genetic manipulation across different species.
• Recombinant BAC technology, coupled with fluorescent reporters, significantly advances the study of complex biological processes.