Development of expression-ready constructs for generation of proteomic libraries.

Area of Science:

• Molecular Biology
• Proteomics
• Genomics

Background:

• High-throughput protein expression requires efficient methods for generating expression-ready clones.
• Existing methods may lack the scale and verification needed for comprehensive proteomic studies.

Purpose of the Study:

• To establish a large-scale, sequence-verified collection of open-reading frames (ORFs) for protein expression.
• To facilitate diverse proteomic applications through a flexible cloning system.

Main Methods:

• Open-reading frames (ORFs) amplified via PCR from cDNA clones.
• Subcloning into loxP-containing donor vectors, creating native stop and no-stop codon variants.
• Sequence verification of all generated clones to ensure accuracy.

Main Results:

• Generated over 11,000 sequence-verified ORFs (78-6,699 bp, median 1,056 bp).
• Developed a collection representing the largest set of fully sequence-verified "movable ORFs" for a model organism.
• Successfully transferred 5,800 ORFs for FLAG-HA tagged protein production in Drosophila.

Conclusions:

• The developed method enables high-throughput production of expression-ready ORFs.
• This extensive ORF collection significantly advances proteomic research, functional genomics, and protein interaction mapping.
• The system supports expression in bacteria, cell lines, and transgenic animals, offering broad applicability.