Cell-free protein synthesis using multiply-primed rolling circle amplification products.

Area of Science:

• Molecular Biology
• Biotechnology
• Protein Synthesis

Background:

• In vitro transcription and translation (IVTT) is a valuable technique for protein production.
• High-throughput IVTT requires substantial pure template DNA, which can be challenging to obtain.
• Multiply-primed rolling circle amplification (RCA) produces large DNA quantities but with structural complexities.

Purpose of the Study:

• To evaluate the suitability of RCA-generated DNA as a template for in vitro transcription.
• To assess the efficiency of protein synthesis using RCA DNA in coupled in vitro translation.
• To develop a streamlined, single-tube workflow for DNA amplification, transcription, and translation.

Main Methods:

• Multiply-primed rolling circle amplification (RCA) using φ29 DNA polymerase.
• In vitro transcription using RCA-generated DNA as a template.
• Coupled in vitro transcription-translation assays.

Main Results:

• RCA successfully amplified DNA templates.
• Transcripts generated from RCA DNA supported coupled in vitro translation.
• The efficiency of protein synthesis from RCA DNA was comparable to that from purified plasmid DNA on a per-nanogram basis.

Conclusions:

• RCA-generated DNA is a viable template for in vitro transcription and subsequent translation.
• A convenient single-tube method for template amplification, transcription, and translation is proposed.
• This approach simplifies protein production, especially for high-throughput applications.