Scientists build a synthetic cell from scratch that grows, copies its DNA, and divides

A team led by University of Minnesota synthetic biologist Kate Adamala has assembled a cell-like system entirely from nonliving, lab-made biological parts and shown it complete the core steps of a cell cycle: it grew, replicated its genome, and split into daughters. It’s the furthest anyone has pushed a bottom-up artificial cell, and outside experts on the origins of life are calling it a watershed for the field — the strongest demonstration yet that life’s basic behaviors can be reconstructed from dead components.

The construction was a matter of integration. The researchers packed a minimal synthetic genome into a lipid sac (a liposome), paired it with a commercial 36-enzyme kit for reading DNA and making proteins, and borrowed a DNA-replication system from earlier work. Because the genome encodes no metabolic genes, the cell can’t feed itself; instead, separate ‘supply’ liposomes loaded with sugars, lipids, tRNA, and ribosomes fuse with the membrane to deliver what it needs. The long-standing sticking point was division. Rather than rebuild a cytoskeleton, Adamala adapted a trick in which membrane-bound protein tags recruit other proteins that physically crowd and bend the membrane until the cell pinches apart.

Important caveats: the cell is not alive by any definition. It has no metabolism, no waste handling, and no defenses, and it collapses without a constant external drip of food and ribosomes. The work is also not yet peer-reviewed, and at least one outside researcher warned against overhyping a system that isn’t self-sustaining. Still, because every component is known and swappable, the platform could become a tunable chassis for producing drugs or biofuels, modeling disease, and probing foundational questions about the minimum requirements for life and how life first arose.