Researchers at the University of Minnesota have created Spud Cell, the first synthetic cell capable of completing a full cell cycle from non-living chemical components. Led by Prof. Kate Adamala, the team assembled a system with 36 purified enzymes and a 90,000 base pair genome across seven DNA plasmids, all enclosed in a lipid membrane.

Spud Cell grows by fusing with feeder liposomes through a protein it produces itself, directly linking genetic instructions to nutrient uptake. This bypasses the need for complex metabolic pathways that natural cells require. Division occurs when proteins crowd the membrane surface, creating mechanical stress that splits the cell without requiring a cytoskeleton - a major breakthrough that sidesteps previous synthetic biology bottlenecks.

The system demonstrated evolution in action: cells engineered to produce more fusion protein outcompeted originals within five generations, with the advantage increasing under nutrient scarcity. All proteins are synthesized internally using the PURE system, a defined mixture of E. coli enzymes where every component's concentration is precisely known.

However, Spud Cells face significant limitations. They rely on pre-made ribosomes that degrade after 5-10 generations, and about 30% of daughter cells lose complete genome sets during division. Researchers must still build ribosomes from scratch and develop autonomous metabolic pathways to create a truly self-sustaining synthetic organism.