New gene tool stacks multiple traits into exact rice locations
Sánchez E, Sedeek K, Butt H, Mahfouz M
Crispr
The push for biofortified rice and other staple crops with better nutrition or climate resilience depends on tools like this that can reliably stack several beneficial genes at once instead of one at a time.
Think of a plant's genome as a huge instruction manual, and scientists wanted a way to insert whole new chapters, not just single sentences, at a precise page every time. They combined two gene-editing tools, one that writes a tiny molecular 'landing pad' and another that locks big chunks of DNA into that exact spot, and tested it in rice. It worked in nearly half of attempts, and the resulting plants looked just as healthy as normal rice after five weeks of growth.
Key Findings
PrimeStack combines prime editing with Bxb1 serine integrase to install attP landing sites and then integrate large multigene cargos at predefined genomic safe harbors in rice.
Targeted large-cargo integration was achieved in regenerated rice plants with efficiencies up to 45%, confirmed via junction-specific PCR.
Edited plants showed no obvious morphological differences from wild-type plants 5 weeks after soil transfer, and the method was validated by inserting a carotenoid biosynthesis cassette at a confirmed genomic safe harbor.
chevron_right Technical Summary
Scientists created a gene-editing tool called PrimeStack that can precisely insert large packages of multiple genes into exact locations in rice DNA, working up to 45% of the time. This could speed up breeding crops with stacked beneficial traits like better nutrition or disease resistance.
Abstract Preview
Original paper
PrimeStack editors enable efficient and site-specific integration of large multigene cargos in plants.
Precise, site-specific integration of large DNA sequences into plant genomes is a long-standing goal of crop biotechnology and synthetic biology, yet remains constrained by random insertion, ineffi...
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