AI-Designed Gene Scissors Enter the Rice Field: Indian Team Achieves Multimodal DNA Editing in Rice

Proteins designed by artificial intelligence are beginning to move from computer models into real crop cells. A team at the Indian Council of Agricultural Research–Central Rice Research Institute (ICAR-CRRI) adapted the AI-generated nuclease OpenCRISPR-1 for use in plants as Plant OpenCRISPR-1 (POC1), achieving gene knockout, base editing, and prime editing in rice. This adds to crop genetic engineering a tool that is not derived directly from naturally occurring microorganisms.

Here, AI does not decide on its own which segment of rice DNA to modify; instead, it is used to design the protein that performs the editing. The researchers retained the commonly used NGG PAM recognition rule in POC1, allowing it to be tested using some existing SpCas9 workflows and target-design foundations. Experiments in rice protoplasts showed that POC1 produced DNA double-strand breaks at four loci with editing rates ranging from 10.0% to 16.8%, with no significant difference from SpCas9 in the same set of experiments.

The team then attached different functional modules to these “scissors”: adenine and cytosine base editors can rewrite a single DNA letter, while a prime editor installs specified substitutions according to an RNA template without needing to create a typical double-strand break. In its summary of the findings, Nature India noted that the POC1 cytosine editor was more efficient than the corresponding Cas9 system at several targets. However, such advantages still depend on the locus and editing configuration and cannot be directly generalized to all rice genes.

A more critical step was the regeneration of stable rice plants carrying the targeted deletion from transformed cells. This indicates that POC1’s activity is not limited to short-term protoplast tests and can persist through tissue culture and plant regeneration. The study also demonstrated biallelic editing, showing that both copies of the same gene can be modified, which is especially important for establishing stable breeding material.

Another significance of POC1 lies in access to the tool. Cas9- and Cas12-related technologies involve complex patent and licensing arrangements, while OpenCRISPR-1 is presented as an open platform and may lower barriers to academic research and some commercial development. However, “open” does not mean that all downstream components, crop varieties, delivery methods, or market-use scenarios are free from intellectual property restrictions; actual freedom to operate commercially must still be assessed case by case.

The current findings demonstrate that the editing platform can function in rice, but they do not yet show that it has produced varieties with better yield, disease resistance, stress tolerance, or nutritional performance. Further research is still needed to broaden assessments of genome-wide off-target effects, stability across different varieties and tissues, trait inheritance, and field performance. How future products are regulated under each country’s rules for gene-edited crops will also affect whether the technology can truly move beyond the laboratory.