Claude Discovers Novel Enzyme System With CRISPR-Like Properties
Anthropic announced a new life sciences research group and laboratory, and shared early results: Claude autonomously discovered a novel enzyme system associated with DNA repeats, a pattern reminiscent of CRISPR. The system, called array-associated reverse transcriptases (ART), was identified after 950 Claude agents spent 21 hours searching through DNA databases using 210 million tokens[1].
What Claude found
The discovery is based on a reverse transcriptase (RT), an enzyme that copies RNA into DNA. The underlying RT had been identified in previous studies in a jumbo phage (a virus that infects bacteria), but Claude appears to be the first to notice the system's defining features: an associated array of non-coding DNA sequences and an additional accessory protein of unknown function[1].
The system has a set of characteristics that have only ever been found together in a handful of other systems, all of which are programmable and perform operations like cutting, copying, and pasting DNA. Beyond CRISPR, which has already transformed science and medicine, several other such systems are in development as promising tools[1].
How it worked
Anthropic gave Claude a prompt to search through a massive database of DNA sequences for interesting new examples of reverse transcriptases. Human involvement was limited to the initial prompt and the lab work. Claude agents combed through the database, investigated distinct RT families, and used their own judgement to identify interesting candidates[1].
After 21 hours of searching by roughly 950 agents using 210 million tokens, one agent spotted a repeating pattern of DNA sequences next to the gene for an odd-looking RT. After further analysis and testing in Anthropic's lab, the team recognized the pattern as a previously uncharacterized enzyme system[1].
Why it matters
Many discoveries that revolutionized biology started with a scientist noticing something odd in the diversity of molecular machines found in nature. Restriction enzymes were found in bacterial immune systems and launched the biotechnology industry. Taq polymerase was identified in a Yellowstone hot spring bacterium and became the basis for PCR. CRISPR was first noticed as unusual repeat sequences in bacterial DNA and is now the foundation of gene editing-based medicines[1].
Anthropic's research group was formed in spring 2026 to see whether general AI models can systematize and accelerate such discoveries. The ART system is an early result from that effort[1].
Expert response
Feng Zhang, one of the pioneers of CRISPR genome editing and a professor at MIT and the Broad Institute, reviewed the pre-print and said: "This is an exciting example of how AI agents can contribute to biological discovery. The identification of RNA-repeat arrays associated with reverse transcriptases is genuinely intriguing and merits further investigation. I hope this work encourages more scientists to explore how AI can support their research."[1]
The lab
Anthropic's lab is located in the Bay Area and operates at biosafety levels BSL-1 and BSL-2. All lab work is performed by human scientists. The team uses Claude Science and Claude Code, the same tools available to any scientist, sometimes with a harness that coordinates many Claude sessions running in parallel[1].
The work to understand the primary function of ARTs is ongoing. Anthropic has released a pre-print with more details and says it is important to share findings early to give the community insight into what they are working on[1].
On Hacker News, the story drew 575 points and 589 comments, making it one of the most discussed science stories of the week[2].
Sources
[1] Anthropic: "Claude discovers a novel enzyme system" (September 2026)
[2] Hacker News discussion (575 points, 589 comments)