Gene Replacement by Homologous Recombination

Area of Science:

• Molecular Biology
• Genetics
• Biotechnology

Background:

• Homologous recombination (HR) is a traditional gene editing technique.
• CRISPR/Cas9 is a newer, widely adopted gene editing technology.
• Certain genes are challenging targets for CRISPR/Cas9 due to sequence properties.

Purpose of the Study:

• To highlight the continued utility of homologous recombination for gene replacement.
• To identify scenarios where HR is advantageous over newer gene editing methods.
• To emphasize the practical benefits of HR in specific genetic contexts.

Main Methods:

• Gene replacement using homologous recombination.
• Design of gene replacement constructs with GOI-flanking sequences.
• Verification of recombination events via whole-genome sequencing.
• Utilizing custom synthetic gene synthesis services.

Main Results:

• Homologous recombination demonstrates robustness to minor sequence mismatches.
• Recombination event accuracy is reliably confirmed through whole-genome sequencing.
• Synthetic gene production facilitates rapid generation of null mutants.

Conclusions:

• Homologous recombination remains a viable and effective strategy for gene replacement, particularly for recalcitrant gene targets.
• The technique's tolerance for sequence variations and straightforward verification make it a reliable choice.
• Leveraging synthetic gene services streamlines the creation of gene knockout models.