PAM-Less CRISPR-SpRY Genome Editing in Plants

Area of Science:

• Molecular Biology
• Plant Science
• Gene Editing Technologies

Background:

• The SpCas9 enzyme is a powerful tool for genome editing, but its targeting is restricted by the protospacer adjacent motif (PAM).
• Engineered SpCas9 variants, such as SpRY, offer PAM-unrestricted DNA targeting, expanding the possibilities for genome engineering.
• Developing efficient and adaptable tools for SpRY-based editing in plants is crucial for advancing crop improvement and plant biology research.

Purpose of the Study:

• To describe a fast, efficient, and robust protocol for preparing SpRY-derived genome and base editors.
• To demonstrate the adaptability of these editors for targeting various DNA sequences in plants using modular Gateway assembly.
• To provide detailed protocols for creating T-DNA vectors and assessing editing efficiency in rice protoplasts.

Main Methods:

• Utilized modular Gateway assembly for the construction of SpRY-derived genome and base editors.
• Developed detailed protocols for preparing T-DNA vectors suitable for plant transformation.
• Assessed genome editing efficiency via transient expression in rice protoplasts.

Main Results:

• Successfully established a rapid and efficient method for generating SpRY-based genome and base editors.
• Demonstrated the modularity and adaptability of the SpRY system for targeting diverse plant DNA sequences.
• Validated the protocols for T-DNA vector construction and confirmed editing efficiency in rice protoplasts.

Conclusions:

• The developed SpRY-based editing system offers a versatile and efficient tool for plant genome engineering.
• The provided protocols facilitate the easy adaptation and application of SpRY editors in various plant systems.
• This advancement holds significant potential for accelerating research in plant genetics and crop development.