The assembly of a minimal synthetic cell that grows and divides
Researchers have integrated genome replication and membrane growth into a single liposome, marking a significant step toward the construction of life from chemical components.
Dr. Ines Havel
Jul 3, 2026 · 1 min read
A microscopic water droplet, encapsulated in a fatty membrane and governed by a 36-gene genome, has successfully demonstrated the baseline functions of a living system. Developed at the University of Minnesota, the synthetic entity—designated SpudCell—can ingest nutrients, replicate its genetic material, and undergo division. While it does not yet meet the criteria for life, it represents a rare successful integration of multiple cellular modules that were previously only functional in isolation.
The mechanism relies on the PURE system, a collection of proteins and ribosomes that allow DNA to be translated into proteins within a synthetic vesicle. To facilitate growth, the researchers engineered the genome to express molecular tags on the droplet’s surface. These tags attract and fuse with smaller nutrient-carrying vesicles, increasing the primary cell's volume. Division is triggered by a second set of surface proteins that, when bound to a specific molecule in the surrounding medium, generate enough physical repulsion to split the droplet in two.
The process remains a demonstration of principle rather than a robust biological model. SpudCell lacks the ability to manufacture its own ribosomes, meaning its internal machinery degrades over time. Furthermore, the division process is currently imprecise; after five cycles, only 30 percent of the resulting droplets retain a complete genome. Mechanical intervention is often required to ensure the split occurs, highlighting the gap between this engineered system and the autonomous self-regulation of natural bacteria.
Despite these limitations, the achievement suggests that the fundamental processes of life can be reduced to a specific set of chemical instructions. By proving that growth and replication can be linked within a controlled environment, the work provides a blueprint for future synthetic chassis that could be engineered to manufacture complex compounds with greater precision than modified natural organisms.