Biotic

SpudCell

Is SpudCell alive?

SpudCell was constructed, not created, and its makers do not claim to have built life.

What counts as “life” has no single agreed definition. SpudCell performs the behaviors often used to tell the living from the inert (it feeds, grows, replicates its genome, divides, and undergoes selection), yet it is far simpler than any natural cell and was assembled, part by part, by hand.

SpudCell does not yet do most of what living cells do. SpudCell cannot sustain itself without outside help. Whether that makes it alive is a philosophical question that many more experts, traditions and groups will consider.

What matters is what SpudCell makes possible: a system whose every component is known and can be changed one at a time is a system that an engineering discipline can be built around. The work of synthetic biology now scales in earnest.

How does SpudCell work? How does it feed, grow, and divide?

SpudCell carries a 90-kilobase genome across seven DNA molecules, housed in a lipid membrane called a liposome. Its proteins are made by the PURE system, a chemical system that’s made from the minimal set of individually defined components that’s required to synthesize proteins.

SpudCell feeds and grows according to instructions in its genome. It grows by fusing with small “feeder” liposomes that supply lipids for its membrane along with ribosomes, enzymes, and small molecules for its function. This fusion is triggered by a protein the cell makes from its own DNA, so the genome controls whether SpudCell feeds, how fast it grows, and how large it becomes. Feeding this way, rather than running a full metabolism, lets SpudCell complete a full cell cycle with a far smaller genome than a natural cell needs.

SpudCell divides under genetic control, without the cytoskeleton natural cells rely on to split (this has been a longstanding bottleneck in the field given how complex it is to build an entire cytoskeleton). A protein the genome encodes crowds the membrane until it splits, and cells that make more of this protein divide more readily, tying division to the genome.

SpudCell is subject to selection. When the researchers introduced a genetic change that raised production of the growth protein, cells carrying it grew faster, produced more offspring, and outcompeted the original over five generations, and more so when food was scarce. This demonstrates selection and competition in a synthetic system. However, because this change was introduced to the system rather than arising as a spontaneous genetic mutation, SpudCell has not yet demonstrated open-ended evolution.

Each generation takes roughly twelve hours at 30°C with regular feeding, and the team has run the full cycle for five generations. (For scale, E. coli divides every 20–30 minutes.)

SpudCell is an early prototype, and it relies on outside help in several ways:

Its genome is split across seven DNA molecules rather than consolidated into one, and passing the complete genome to every daughter cell is not yet reliable.
Its systems for making proteins and managing energy are basic, and it cannot yet make its own building blocks from simpler inputs.
It cannot yet build its own ribosomes (the machines that make proteins), so these, with key enzymes, are supplied from outside through feeding.

Each is a known limitation and an active line of work. Extraordinary engineering separated the Wright’s Flyer at Kitty Hawk from the mass production of Boeing 747s. With SpudCell’s modular architecture, this work can now begin in earnest.

How does SpudCell compare to other synthetic-cell work, including the JCVI minimal cell?

SpudCell brings together groundwork laid by other groups that demonstrates genome replication inside liposomes, growth by fusion, division mechanisms in synthetic cells, and selection in cell-like compartments.

Each of these pieces of work demonstrated individual pieces of the cell cycle. SpudCell is the first system that integrates feeding, growth, replication, division and selection as a single cycle, coupled to one genome, entirely using components scientists put there.

SpudCell is also a different kind of achievement from a minimized natural cell. The best-known minimal cell, built at the J. Craig Venter Institute, was made by the top-down approach, removing genes from a natural living bacterium until it reached the smallest genome that still kept the cell alive. That means much of the cell’s machinery was inherited intact from a living organism, and much of it remains uncharacterized to this day (when first reported 149 of the JCVI minimal cell’s 473 genes were of unknown function; many unknown functions remain). SpudCell was built from the opposite direction, bottom-up, assembled from individually specified parts rather than carved down from something already alive.

Why build a synthetic cell from defined parts?

A system we can fully specify is a system we can understand and change.

In a natural cell, even a minimal one, most components were inherited from evolution and many are still uncharacterized, so changing one thing reliably is difficult. Altering essential machinery is often lethal.

SpudCell is the reverse: every component is defined, so a researcher can swap a single gene, enzyme, or pathway and measure the effect on the whole. One example is the ribosome, the cell’s protein factory: this cannot be freely altered in a living cell without killing it. With SpudCell’s modular architecture, these kinds of questions become more experimentally tractable.

In the medium term, a modular approach allows cellular biology to be approached as a true engineering discipline rather than a series of one-off results. Long term, at-scale cellular engineering opens pathways to building entirely custom cells from scratch with desired capabilities, manufacturing drugs, foods, fuels and novel materials.

Has the work been peer-reviewed?

This work is being released as a preprint, with peer review underway at a journal.

The team chose to share it early, in keeping with Biotic’s commitment to openness, so other labs can scrutinize the methods and attempt to replicate the core findings faster.

Ahead of release, the authors discussed the work extensively with experts in the field and refined the paper in response.

Is SpudCell safe? Could it survive outside the lab?

SpudCell cannot survive outside controlled laboratory conditions:

It depends on regular external feeding and on precisely maintained temperature, pH, and salt levels
It has no defenses against environmental stress, oxidation, or contamination
It cannot compete with natural organisms for resources

Outside the narrow conditions of the lab, its basic processes simply stop.

Could this be misused to make a biological weapon?

The risk is remote. SpudCell cannot live outside the lab, and anyone intent on causing harm using biology has far simpler routes than building a synthetic cell from defined parts.

Synthetic biology has also taken dual-use questions seriously for fifty years, from the 1975 Asilomar conference through its recent fiftieth-anniversary meeting. Biotic’s open structure is part of that tradition: building in the open is how potential risks are identified and addressed early, well before any capability could be misused, rather than behind closed doors.

When might synthetic cells be useful beyond research?

Engineered cells already do valuable work (making medicines and biofuels, for instance), but they operate within the limits that evolution has set.

SpudCell and its derivatives will break that restriction. Synthetic cells built from defined parts could one day be designed for tasks and conditions natural cells cannot handle, from manufacturing novel therapeutics and materials to sequestering carbon and pollutants.

Those are currently long-horizon possibilities, but how fast they arrive depends largely on how many researchers can build on the same foundations and collaborate on the challenges openly. This is part of the case for Biotic.

Why is Biotic launching now?

Several factors make this the moment:

SpudCell’s demonstration of the cell cycle is a hinge moment for biotechnology. The systematic engineering of cells is a program that can now begin in earnest.
The shared foundations of an engineering discipline (the standard parts, reference designs, tools) tend to get built once, early, and shape what follows. Synthetic cell engineering is at that point now.
Biology is increasingly treated as a strategic domain, with governments and companies investing accordingly, which makes the question of how those foundations are built, openly or privately enclosed, pressing rather than academic. Biotic exists to make sure synthetic cell engineering is built in the open. That choice is still available today, and we are committed to keeping it that way: this foundation should always remain open source.

How does SpudCell connect to Biotic?

SpudCell is a result from the Adamala Lab at the University of Minnesota. Biotic did not produce it. Biotic is the institution built to take the next step.

SpudCell shows that a complete cell cycle can be run from individually specified, purified components. Turning that into a working engineering discipline is a problem no single lab can solve: results are not comparable across labs, modules that work alone fail when combined, and failed protocols vanish instead of becoming shared knowledge.

Biotic exists to build the shared, open infrastructure that closes those gaps, so that any group’s advance becomes something every other group can build on.

What will Biotic build, and what does “open infrastructure” mean in practice?

Biotic is building a modular platform for synthetic cell engineering and more, and releasing every layer of it openly.

At one level, that includes a major engineering program that addresses five open challenges that stand between SpudCell and a dependable engineering substrate:

Consolidating the genome into a single, stably inherited form
Strengthening the cell’s internal systems for making proteins and managing energy
Making genetically-encoded division efficient and dependable
Engineering the ribosome, including the long-sought ability to build and evolve ribosomes from defined components (ribogenesis)
Integrating advanced approaches to safety and security that can only be realized in cells built from the bottom up

On another level, Biotic is working on the distribution infrastructure that scales these engineering possibilities, including:

Building open protocols as step-by-step methods for cellular engineering that other labs can reproduce without reverse-engineering them from papers
Releasing open characterization data about how components behave so performance can be predicted rather than rediscovered by trial and error
Releasing open genome sequences and reference design, free to use and improve
Building open computational tools to model and debug systems before building them physically, to increase speeds of experimentation

The aim is a shared chassis the whole field can build on, so that researchers across biology, chemistry, physics, and computation can contribute to one engineering program without anyone imposing a single roadmap.

At launch, Biotic is releasing the SpudCell genome sequences and reference designs and core construction protocols. In the following months, it will add characterization datasets and modeling tools.

Who controls Biotic?

Today, Biotic is led by its four co-founders (Kate Adamala, Drew Endy, Jan Jedryszek, and Chris Raggio) as a public-benefit institution. By design, that control is meant to broaden rather than concentrate.

In the short term, open protocols, sequences, data, and tools help guarantee this: releasing all these details in the open means no single actor can gate-keep them by design.

Longer term, Biotic’s founders intend to establish a multilateral alliance to steward the shared infrastructure, governed by a broad membership rather than by Biotic alone, much as the Linux Foundation or the World Wide Web Consortium oversee shared technical infrastructure while being governed by a broad alliance.

The specifics of that governance are deliberately being left open, to be shaped with founding members as they join rather than fixed in advance.

How does Biotic work with the wider field, and how can others get involved?

Biotic starts from the premise that no single laboratory can build or should own the future of cellular engineering. Biotic’s role is to host and steward that shared work, not to own it.

Researchers can contribute by using and improving the open resources, by contributing their own protocols, designs, and characterization data back to the shared layer, and by working on the open engineering challenges in coordination rather than in parallel.