Researchers use AI to break the rules of nature and create a living organism that lacks a fundamental building block of life the first synthetic 19-amino acid life form is here

Date:
Wed, 13 May 2026 01:05:00 +0000

Description:
Scientists just made the first ever observed organism with fewer than 20
amino acids in its make-up, and it was made possible by AI.

FULL STORY ======================================================================Copy link Facebook X Whatsapp Reddit Pinterest Flipboard Threads Email Share this article 0 Join the conversation Follow us Add us as a preferred source on Google Newsletter Subscribe to our newsletter AI creates a strain of E. coli with 19 amino acids, removing isoleucine from the ribosome This is the first organism to have fewer than 20 of the universal amino acids The discovery supports early life theories and lays a future for synthetic organisms in medicine Researchers from Columbia University, the Massachusetts Institute of Technology and Harvard University have successfully used AI to create a brand-new version of the bacteria E. coli that does away with one of the 20 amino acids that are considered the primary building blocks of living organisms.

A study published in Science details the significance of this discovery,
which uses AI and protein engineering to create a modified strain of E. coli with just 19 amino acids, making do specifically without isoleucine. This is
a major milestone not just for biology, but also across AI and research into the origins of life. While some organisms have already been seen to employ more than 20 amino acids, scientists have never found anything with fewer
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As for isoleucine being the amino acid of focus within the selection of 20, its chemical similarity to leucine and valine is said to have been a major factor in the decision due to it being the most replaceable.

But rather than trying to change the entire make-up of the proteome (seen as the entire collection of proteins within an organization), the scientists looked to tap into the ribosome, which is responsible for building those proteins in the first place. Under the experiment, the scientists were able
to change the 382 isoleucine building blocks found in the ribosome with it still working as expected.

This makes it a first-of-its-kind study, because until now, scientists have only been able to edit the genetic code of bacteria, yeast and other
organisms by adding amino acids not removing them. Are you a pro? Subscribe to our newsletter Sign up to the TechRadar Pro newsletter to get all the top news, opinion, features and guidance your business needs to succeed! Contact me with news and offers from other Future brands Receive email from us on behalf of our trusted partners or sponsors By submitting your information you agree to the Terms & Conditions and Privacy Policy and are aged 16 or over.

The experiment worked by using AI protein language models to predict alternative protein structures and offer up amino acid substitutes, with the goal of preserving the ribosomes functions without using isoleucine.

Many of the AI-generated designs offered up sequences that humans might not have designed, with the AI models capable of analyzing potentially successful combinations at a far greater pace than humans.

18 of the 50 E. coli strains created from the process of replacing isoleucine with alternative amino acids went on to grow normally. The next stage was to combine 21 of the rewritten ribosomal proteins into one strain of E. coli, which after some additional tweaks, went on to grow (albeit more slowly than regular, unmodified strains). What to read next Amazons new AI Bio Discovery tool can provide researchers with high-end drug discovery toosl Unlocking science: building AI researchers can trust AI robot snaps together like Lego and moves unlike anything I've ever seen before I can't stop watching

Columbia University systems and synthetic biologist Harris Wang described totally eliminating an amino acid as almost the hardest thing you could think about, because its the biggest, most complicated protein complex.

What the discovery means for scientific research is that at least some core biological systems can tolerate substantial genetic code disruption. It also supports the argument that early life may have used fewer amino acids than modern organisms, offering up new perspectives for evolutionary theories.

However, beyond evolutionary biology, the research also lays out a future where customized, synthetic organisms can play focused roles across specific tasks such as medicine and healthcare. Another conclusion is that modified organisms may become dependent on unusual chemistries not found in natural environments, therefore improving biological containment.

Looking much further ahead, its possible that AI-assisted genetic
modification could help researchers to design organisms for extreme environments, including space habitats where access to the full range of
amino acids may be more limited. Follow TechRadar on Google News and add us
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