AI Breakthrough: E. Coli Strain Thrives on 19 Amino Acids

Researchers from Columbia University, MIT, and Harvard have engineered a unique strain of E. coli named Ec19 ^[1]. Using AI algorithms and protein language models, the team removed the amino acid isoleucine from the bacteria's ribosome ^[1][2]. This marks the first time an organism has reproduced using only 19 of the 20 universal amino acids ^[2][3].

The study demonstrates that life can function for hundreds of generations without a building block previously thought essential ^[1][2]. Scientists achieved this by redesigning the organism’s internal machinery to bypass the need for isoleucine entirely ^[2]. This discovery challenges established rules of biology and opens new doors for synthetic life design ^[3].