Development of a highly efficient prime editor 2 system in plants.

Area of Science:

• Plant Biology
• Molecular Biology
• Biotechnology

Background:

• Prime editing (PE) systems offer precise genome modification but face efficiency limitations in plants.
• Low editing efficiency restricts the broader application of PE in plant research and crop improvement.

Purpose of the Study:

• To develop an enhanced plant prime editor 2 (enpPE2) system with significantly improved editing efficiency.
• To overcome the low efficiency limitations of existing prime editing systems in plant applications.

Main Methods:

• Updated the prime editor architecture to PEmax.
• Engineered pegRNA with a structured motif.
• Expressed the engineered pegRNA under a composite promoter.
• Implemented these optimizations in the enpPE2 system for plant applications.

Main Results:

• The enpPE2 system achieved high editing frequencies ranging from 64.58% to 77.08% in T0 rice plants.
• These frequencies are substantially higher compared to the unmodified pPE2 system.
• Demonstrated the effectiveness of stacked optimization strategies in enhancing prime editing performance.

Conclusions:

• The enpPE2 system represents a significant advancement in plant genome editing technology.
• It provides a robust and powerful tool for precise genetic modifications in plants.
• The enhanced efficiency facilitates broader applications in plant science and crop development.