Scarless genome editing technology and its application to crop improvement

Area of Science:

• Genetics and Genomics
• Molecular Biology
• Biotechnology

Background:

• CRISPR/Cas9 technology has revolutionized genome editing, enabling straightforward gene disruption.
• A significant limitation of current CRISPR/Cas9 systems is the difficulty in achieving precise sequence modifications.
• The need for versatile genome rewriting tools is paramount for advancing genetic research and therapies.

Purpose of the Study:

• To review novel genome editing technologies that overcome the limitations of simple gene disruption.
• To introduce scarless editing by two-step homology-directed repair (HDR) as a solution for precise genome rewriting.
• To highlight the capability of two-step HDR to modify genomes from single nucleotides to large sequences.

Main Methods:

• Review of recent advancements in genome editing technologies.
• Focus on scarless editing strategies utilizing two-step homology-directed repair (HDR).
• Analysis of the capacity for precise sequence alteration at various scales.

Main Results:

• CRISPR/Cas9 facilitates gene disruption but not facile sequence alteration.
• Emerging technologies address the challenge of free rewriting of genome sequences.
• Two-step HDR offers scarless editing for precise genome modification.

Conclusions:

• Scarless editing by two-step HDR provides a powerful method for freely rewriting genome sequences.
• This technology enables precise modifications ranging from single nucleotides to thousands of nucleotides.
• Two-step HDR significantly advances the capabilities of genome editing beyond simple disruption.