Why synthetic cells die after five generations: they can't recycle their own broken parts
NikoMcCarty · x · 2026-10-07
- Researchers built SpudCell, a synthetic cell that grows, eats and divides, but it breaks down after 5 generations. Lead author Kate Adamala's explanation: the cell cannot break down its own waste — dead ribosomes and broken proteins simply accumulate, filling the cell generation after generation.
- Adding proteases is too blunt (they'd destroy healthy proteins too), and recreating all of biology's quality-control enzymes would bloat a minimal cell's metabolism.
- The real bottleneck is molecular sensors that recognize broken molecules and selectively destroy them. The author argues attempts to create life will yield better biological tools, but is skeptical of Adamala's prediction of perpetual cell division by 2030.
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