This research develops a Minesweeper-inspired algorithm to identify and remove non-essential genes from Mycoplasma genitalium, the smallest known self-replicating organism. The algorithm eliminated 35% of the genome in simulation, offering a path to record-breaking minimal cells and improving bacterial strains used to produce antibiotics, vaccines, fuels, and climate-solution technologies.

A hidden evolutionary arms race unfolds between bacteria and the viruses that attack them. By understanding how bacteria cut and rearrange DNA through recombination, researchers can harness these mechanisms for precise gene editing. This work could enable powerful new treatments for genetic diseases, helping patients like the first personalised-therapy recipient, KJ.