Anthropic announced preliminary results from a life sciences research program that uses Claude agents to analyze large databases of DNA sequences and suggest undescribed biological systems. During this work, the agents identified a new enzymatic system associated with DNA repeats structurally resembling CRISPR arrays, and the company called it Array-associated reverse transcriptases, or ART.
Anthropic does not yet know the system’s primary function, so it does not present it as a gene-editing tool or a technology ready for use. However, the preliminary results indicate the combination of rare characteristics in a single system: a reverse transcriptase, an adjacent partner gene, and a long array of regularly spaced DNA repeats. ART is found primarily in phages, which are viruses that infect bacteria.
How did Claude find the system?
The researchers began by directing Claude to search for new and interesting examples of reverse transcriptases within a broad database. After approximately 21 hours, during which nearly 950 agents used 210 million tokens, the agents collected more than 200,000 reverse transcriptases, identified 3,500 candidate systems, and then narrowed them down to 20 candidates for analytical reports reviewed by scientists.
One agent drew attention to a reverse transcriptase with an unusual appearance, then examined the DNA sequence surrounding it and noticed an array of adjacent repeats. It subsequently measured the number of repeats and the distances between them, compared them with known systems, and reviewed the scientific literature before referring the result for human review.
What did the experiments show?
According to the published results, ART consists of three main components: the reverse transcriptase, a partner gene located next to it, and an array of DNA repeats. The initial experiments showed that the array is also expressed as a set of separate short RNA molecules, raising the possibility of a functional mechanism associated with these repeats, although the source does not yet establish their nature or role.
The similarity to CRISPR relates to the array’s structure and the idea of producing multiple RNA sequences; however, this structural similarity does not mean that ART works in the same way or is programmable. Anthropic says that biochemical and structural experiments are continuing to determine the system’s function.
Why does this news matter?
The significance of the result lies in presenting a practical model for using artificial intelligence to expand the scale of genomic discovery, not in announcing a completed biological tool. A task that might take a specialized scientist weeks or months—searching through undescribed protein families and comparing their genomic neighbors—was carried out by the agents on a large scale, before scientists tested the candidates in the laboratory.
Anthropic emphasizes that humans remained responsible for the laboratory work and review, and that its laboratory operates within biosafety levels BSL-1 and BSL-2 and does not handle pathogens that infect humans. The result also remains an initial discovery published as a research preprint; the function, programmability, and any potential therapeutic or engineering applications of ART remain open questions requiring independent verification and additional experiments.