A synthetic guide RNA scaffold enhanced CRISPR/Cas9 editing efficiency in plants across multiple gene targets.
Dutta TK, Ray S, Akhil VS, Rupinikrishna K, Chauhan U
Crispr
Tomatoes engineered to resist drought, rice bred to fight blight without pesticides, and vegetables tailored to your climate are closer to reality because scientists can now edit plant DNA with far greater precision and reliability.
CRISPR is a molecular scissors tool that lets scientists cut and change specific spots in a plant's DNA. The problem is that one key piece — a small RNA molecule that guides the scissors to the right spot — often doesn't work consistently in plants. This team redesigned that guiding molecule so it folds better and grips the scissors more tightly, making the whole editing process work far more often across many different plants and target locations.
Key Findings
The redesigned guide RNA scaffold improved CRISPR editing efficiency across 19 diverse gene targets in three plant species (Arabidopsis, rice, and tomato).
Two structural changes drove the improvement: a stabilized stem-loop extension (tetra loop) and a mutation at the transcription-termination site, together improving RNA folding and Cas9 protein binding.
The new scaffold is compatible with multiplex editing systems (polycistronic tRNA-gRNA), enabling simultaneous editing of multiple genes in a single experiment.
chevron_right Technical Summary
Researchers engineered an improved guide RNA component for CRISPR gene editing that works more reliably across diverse crop plants. This upgraded tool boosted editing success rates in rice, tomato, and Arabidopsis across 19 different gene targets.
Abstract Preview
CRISPR/Cas9 mediated genome editing is a highly powerful and versatile tool for accelerating crop improvement. The editing efficiency of CRISPR/Cas9 system in planta has been highly variable owing ...
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