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Precision RNA Base Editing in Plant Organelles Using Engineered Synthetic P-type PPR Editing Factors

ABSTRACT: RNA editing, particularly cytidine-to-uridine conversions in plant organelles, plays a crucial role in regulating gene expression. While natural PLS-type PPR proteins are specialized in this process, synthetic PPR proteins offer significant potential for targeted RNA editing. In this study, we engineered chimeric editing factors by fusing synthetic P-type PPR guides with the DYW cytidine deaminase domain from a moss mitochondrial editing factor, PPR56. These designer PPR editors (dPPRe) were tested in Escherichia coli and Nicotiana benthamiana chloroplasts and mitochondria, demonstrating efficient and precise de novo RNA editing. Transcriptome-wide analysis of the most efficient chloroplastic dPPRe revealed minimal off-target effects, with only three non-target C sites edited due to sequence similarity with the intended target. This study introduces a novel and precise method for RNA base editing in plant organelles, paving the way for new approaches in gene regulation applicable to plants and potentially other organisms.

ORGANISM(S): Nicotiana benthamiana

PROVIDER: GSE276199 | GEO | 2025/04/17

REPOSITORIES: GEO

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