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"According to NASA's Definition of Life, I'm Not Alive" - Why Nobody Can Define Life | Dr. Kate Adamala

46 min episode · 2 min read
·
Kate Adamala

Episode

46 min

Read time

2 min

Topics

Fundraising & VC, Artificial Intelligence, Software Development

AI-Generated Summary

Key Takeaways

  • Synthetic cell architecture: Spud cells consist of purified bacterial proteins and small molecules loaded with DNA plasmids, encased in a lipid vesicle membrane. They feed by expressing surface proteins that recruit nutrient-filled liposomes, and divide via a genetically encoded membrane-curvature protein — the first system demonstrating both processes driven by internal genetic activity rather than external mechanical intervention.
  • Ribogenesis as the critical bottleneck: The single largest unsolved problem in synthetic cell engineering is ribogenesis — assembling functional ribosomes from purified components. All necessary proteins can be expressed, but they fail to self-assemble into active ribosomes unless synthesized and assembled simultaneously in sequence. Solving this would enable spud cells to produce their own translational machinery rather than relying on E. coli-derived ribosomes.
  • Biology as general-purpose manufacturing: The strategic goal is replacing petrochemical production with engineered biology. Spud cells that robustly replicate could serve as scalable bioreactors — secreting therapeutic proteins, novel antibiotics using non-canonical amino acids, or bio-based polymers directly into growth media for purification, eliminating dependence on oil-derived molecules across medicine and materials science.
  • Evolution requires scale, not magic: Spud cells currently require artificially introduced mutations because spontaneous DNA replication errors occur too rarely at lab volumes to observe. At primordial-ocean scale over millions of years, spontaneous mutation and selection would emerge naturally. AI-assisted computational modeling of molecular interactions is being developed to accelerate iteration cycles and simulate evolutionary trajectories.
  • Mirror life research halted globally: A 2024 scientific movement led by Adamala successfully paused all major mirror-life research programs worldwide. Mirror cells — built from opposite-chirality biological molecules — could evade immune systems and environmental predators entirely, making containment impossible. The primary safety barrier remains the absence of any viable source for mirror-chirality ribosomes at usable quantities.

What It Covers

Dr. Kate Adamala, synthetic cell engineer at the University of Minnesota, explains how her lab created "spud cells" — synthetic lipid vesicles containing purified biological molecules capable of genetically encoded feeding and division, representing a milestone toward engineering biology as a general-purpose manufacturing technology for medicine and climate solutions.

Key Questions Answered

  • Synthetic cell architecture: Spud cells consist of purified bacterial proteins and small molecules loaded with DNA plasmids, encased in a lipid vesicle membrane. They feed by expressing surface proteins that recruit nutrient-filled liposomes, and divide via a genetically encoded membrane-curvature protein — the first system demonstrating both processes driven by internal genetic activity rather than external mechanical intervention.
  • Ribogenesis as the critical bottleneck: The single largest unsolved problem in synthetic cell engineering is ribogenesis — assembling functional ribosomes from purified components. All necessary proteins can be expressed, but they fail to self-assemble into active ribosomes unless synthesized and assembled simultaneously in sequence. Solving this would enable spud cells to produce their own translational machinery rather than relying on E. coli-derived ribosomes.
  • Biology as general-purpose manufacturing: The strategic goal is replacing petrochemical production with engineered biology. Spud cells that robustly replicate could serve as scalable bioreactors — secreting therapeutic proteins, novel antibiotics using non-canonical amino acids, or bio-based polymers directly into growth media for purification, eliminating dependence on oil-derived molecules across medicine and materials science.
  • Evolution requires scale, not magic: Spud cells currently require artificially introduced mutations because spontaneous DNA replication errors occur too rarely at lab volumes to observe. At primordial-ocean scale over millions of years, spontaneous mutation and selection would emerge naturally. AI-assisted computational modeling of molecular interactions is being developed to accelerate iteration cycles and simulate evolutionary trajectories.
  • Mirror life research halted globally: A 2024 scientific movement led by Adamala successfully paused all major mirror-life research programs worldwide. Mirror cells — built from opposite-chirality biological molecules — could evade immune systems and environmental predators entirely, making containment impossible. The primary safety barrier remains the absence of any viable source for mirror-chirality ribosomes at usable quantities.

Notable Moment

NASA's working definition of life — a self-sustaining chemical system capable of Darwinian evolution — technically excludes individual humans from being classified as alive, since no single person reproduces independently. Adamala uses this paradox to argue that life and non-life exist on a molecular continuum rather than as distinct categories.

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Episode Transcript

That just shows you that there is really no good definition of life. In your world, life is not clearly defined. I think NASA has a working definition, self sustaining chemical system capable of Darwinian evolution. That's a fantastic definition, but according to that definition of life, I'm not alive. The fact that we don't fully understand life right now doesn't mean to me that there's something that we're unable to understand. It just means we lack data at this point. You can create spud cells that feed on carbon in the air. Is that what you're talking about? I'm mostly talking about the molecules. We need a way to make all the molecules that our civilization uses right now. If you put molecules under the right conditions in the right environment, they will start self assembling, and the emergent property of that assembly is what we call life. It's definitely a milestone, but it's not a mic drop. We're not done. We're showing that you can escape this gravity well of evolution. Could you, introduce yourself to listeners, give some of your background? I know I know that you've been working in those area for a while. You had Cinel's, I think they were called before spud cells. If you could give some of that background, and as I said, state what the goal of this research is. My name is Kate Ramala. I'm originally from Poland where I studied chemistry. Then I got my PhD in biophysics in Italy in Rome, and then I moved to The States for the other half of my PhD in origin of life and biophysics of origin of life. And then I did a brief stint in neurobiology, synthetic neurobiology, as a postdoc. That taught me a lot. One of the things that it did teach me is that I don't like neurobiology, and I don't wanna work on that. So when I started my own lab, I wanted to continue the practical applicability of research that I picked up during my neuro biology work. I wanted to know that my research, the things that I'm doing are actually good for something, but I was really drawn to go back to my roots to work on something as cool as origin of life as astrobiology. So I basically wanted to combine that curiosity driven research that I've done in my early training with the practical biomedical economical applicability of the work that I learned during my postdoc. And that led me to synthetic biology and specifically synthetic cell engineering. And the overarching goal of my research is to make biology a general purpose technology. Right now, biology is very specific. We can make a lot of things with biology, but there are very specific things. And general purpose technology is something that you can pick up and apply to a new, direction, new application, new purpose without the need to reengineer the whole chassis. Like, I I can take my work computer …

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