Generation of 2A-linked multicistronic cassettes by recombinant PCR

Area of Science:

• Biotechnology
• Molecular Biology
• Gene Expression

Background:

• Multicistronic vectors are crucial for delivering multiple genes in biomedical research.
• Conventional methods often result in imbalanced protein expression and large vector sizes.
• 2A peptide sequences offer a solution for efficient, stoichiometric multigene delivery.

Purpose of the Study:

• To describe a protocol for creating reliable, multicistronic vectors using 2A peptide sequences.
• To enable efficient and stoichiometric expression of multiple genes from a single open reading frame (ORF).
• To overcome limitations associated with conventional multigene delivery systems.

Main Methods:

• Utilizing 2A peptide sequences, which act as 'cleavage' sites between genes.
• Employing recombinant polymerase chain reaction (PCR) to link multiple 2A-peptide-coding sequences.
• Subcloning the final construct into an expression vector for protein production.

Main Results:

• Achieved nearly 100% separation of genes linked by 2A peptides.
• Demonstrated stoichiometric and concordant expression of multiple genes.
• Minimized vector size and the risk of homologous recombination due to small, divergent 2A peptide sequences.

Conclusions:

• 2A peptide-linked multicistronic vectors provide a powerful tool for multigene delivery.
• This method ensures efficient, stoichiometric protein production, overcoming previous limitations.
• The described protocol facilitates the construction of advanced gene delivery systems for biomedical applications.