Transcriptionally active polymerase chain reaction (TAP): high throughput gene expression using genome sequence data.

Area of Science:

• Molecular Biology
• Gene Expression
• Biotechnology

Background:

• Traditional gene expression methods often involve complex cloning steps.
• There is a need for faster, more direct methods to generate functional proteins from genomic sequences.

Purpose of the Study:

• To describe a novel method for creating transcriptionally active Polymerase Chain Reaction (PCR) fragments (TAP fragments).
• To demonstrate the utility of TAP fragments in direct in vitro and in vivo gene expression studies.
• To establish a high-throughput cloning and gene generation system.

Main Methods:

• Amplification of TAP fragments encoding reporter genes using standard PCR.
• Direct expression of TAP fragments in cultured cells and in mice.
• Induction of antibody response using TAP fragments encoding hepatitis B surface antigen (HBsAg).
• Generation of epitope-tagged TAP fragments for immunocytochemical analysis.
• In vivo homologous recombination for direct transfer of TAP fragments into expression vectors.

Main Results:

• TAP fragments were generated within 1 day and expressed at levels comparable to CMV promoter-based vectors.
• Intramuscular injection of HBsAg-encoding TAP fragments induced comparable antibody titers to plasmid DNA.
• High-throughput cloning without restriction enzymes or ligation was achieved.
• Robotic adaptation enabled generation of over 400 different genes per day.

Conclusions:

• TAP fragments provide a direct and efficient method for gene expression and protein production.
• This technology facilitates high-throughput functional proteome generation directly from genomic data.
• The approach simplifies cloning and expression workflows, accelerating biological research.