We started b.next arsenic a fewer academics looking to lick the problem of interoperability and integration successful synthetic compartment research, and thief our organization recognize the imaginable of synthetic cells. Over the past fewer years, we've been difficult astatine activity connected this pinch Nucleus. But that unsocial isn't enough: synthetic cells tin only spell truthful acold without a dedicated beingness proviso chain. We took connected the situation and now run a manufacturing works building Cytosol—the halfway materials needed to build cells—made to Nucleus unfastened specifications. We precocious shipped our 100th kit. Building industrial-grade infrastructure wasn’t needfully what we expected would beryllium needed erstwhile we group out, but it's a captious adjacent measurement for synthetic cells to turn from an world effort to solving global-scale problems. This station shares that journey.
In 2023, we received a statement to build a elemental synthetic compartment sensor from afloat unfastened and specified components, arsenic a intends for jumpstarting collaborative and interoperable engineering of synthetic cells. A cardinal portion of our strategy was to build an unfastened PURE strategy pinch easy-to-use protocols for construction, based connected the OnePot PURE system. This was a clear request for the synthetic compartment community, which had adopted the PURE strategy arsenic its halfway platform, but practically only had entree to non-extensible and non-modifiable commercialized formulations. What we thought would return a fewer months turned into a multi-year undertaking arsenic we uncovered foundational challenges successful synthetic compartment infrastructure and proviso chains—and yet led america to present and statesman manufacturing “Cytosol” arsenic a halfway substrate for building synthetic cells.
This should beryllium easy…right?
We were blocked astatine the very first step. We couldn’t get the 36 plasmids needed to instrumentality the OnePot PURE strategy proteins. They were only disposable nether restrictive worldly licensing position (UBMTA), which arsenic a company, we could not access—even though our extremity was to make PURE amended for the community. As we said pinch PURE researchers, we besides learned that the disposable PURE plasmid group was incomplete and contained mutated plasmids. To our surprise, only a fistful of labs astir the world had really successfully built the PURE system, often taking complete 18 months to do so—a sobering magnitude of clip to get to a baseline exertion first published successful 2001.
We took this situation head-on, re-designing and synthesizing our ain improved, open-access group of PURE plasmids, and processing straightforward protocols for PURE macromolecule accumulation and assembly. After 9 months of painstaking development, we could yet execute detectable output—a captious milestone that confirmed that the unfastened strategy could activity astatine all. We shared our first group of PURE protocols and plasmids successful mid-2024 done the Nucleus platform, which we had precocious launched arsenic an unfastened commons for the organization to build synthetic cells together.
We can't spot the proviso chains.
But a functioning PURE strategy requires not conscionable proteins—it besides needs tRNA and ribosomes. When we started our work, tRNA were disposable from 2 providers: Roche and Sigma. In 2023, Roche stopped supplying tRNA. Then, conscionable arsenic we had gotten PURE proteins moving pinch our unfastened system, Sigma besides stopped supplying tRNA. We learned that tRNA manufacturing had been deprioritized, and would beryllium connected backmost bid indefinitely. A cardinal reagent needed to build synthetic cells was abruptly unavailable.
We realized conscionable really brittle the proviso chains for synthetic cells were—a hodgepodge of different providers, often singular for a fixed reagent, nary of whom cared astir synthetic compartment researchers successful particular. As we began getting much requests for our unfastened PURE DNA plasmid set, it became clear that achieving reliable synthetic compartment engineering crossed the organization would return much than we had primitively planned for. The organization needed reliable, unfastened protocols not conscionable for PURE proteins, but for each component.
The section needs more.
By mid-2025, we had developed and optimized unfastened protocols, specifications, and materials for producing each PURE components—proteins, mini molecules, tRNA, and ribosomes. We hosted our first PURE shop with 8 postgraduate students and station docs from awesome synthetic compartment labs to statesman disseminating the technology—an intensive sprint successful which participants built the afloat PURE strategy from scratch successful conscionable 1 week. We did truthful pinch the support of Build A Cell and experts from the community, convening an earlier PURE Development Workshop to amended the unfastened strategy and make it easy to use.
As we began moving pinch much researchers, however, we became alert of a basal reality. No matter really accessible we made it, for immoderate individual student aliases lab, making PURE was still a time-consuming process that only led to a constricted magnitude of baseline reagent—just the starting point. Moreover, making immoderate modifications aliases additions to the baseline PURE strategy usually led to manufacturing complexities that were not the expertise of individual labs. While validated, unfastened PURE protocols ensured that immoderate interrogator has the expertise to nutrient their ain reagents if necessary, nonstop entree to validated, ready-to-use reagents for building cells would simply beryllium better, faster, and much reliable. We became convinced that to astir efficaciously catalyze synthetic compartment research, we needed to (1) commencement reasoning successful position of “Cytosol”—PURE-like defined systems built to run synthetic cells and beryllium utilized by synthetic compartment researchers, that could turn successful functionality pinch supporting tooling alongside the field, and (2) supply pre-manufactured Cytosol kits tied to Nucleus unfastened specifications and protocols.
A first synthetic compartment manufacturing plant.
From precocious 2025 to early 2026 we built and operationalized a dedicated manufacturing works successful San Francisco to proviso Cytosol arsenic a instauration for synthetic compartment engineering. In the past six months, we person supported unfastened projects astatine ~20 labs astir the world pinch complete a 100 Cytosol kits, and are continuing to standard our capacities. Our Cytosol kits are built to Nucleus unfastened specifications, and tin beryllium constructed from scratch by anyone via the openly disposable Nucleus protocols and plasmid set. We are actively testing and sharing new, unfastened synthetic compartment modules validated successful and extending baseline Cytosol—including modules for energy, control, and membrane translation. We person besides been supporting collaborators pinch civilization and modified Cytosol kits to alteration much blase synthetic compartment development.
Going forward, we are excited to proceed increasing Cytosol’s capabilities alongside the community. We are starting to build integer and automation devices astir Cytosol— for design and analysis, high-throughput screening and optimization, arsenic good arsenic AI-driven engineering and module integration; and are helping facilitate multi-institutional investigation programs building open, integrated, synthetic compartment technologies utilizing Cytosol. Stable infrastructure and proviso chains are foundational to achieving the imaginable of synthetic cells, and entree to a common, open-formulation Cytosol is simply a subtle but important milestone for the community, 1 we’re happy to person reached. We look guardant to continuing to beforehand these foundations pinch our manufacturing plant, pinch Nucleus, and pinch immoderate other we observe is needed next. If you want to build pinch Cytosol, propose a module, aliases collaborate, please scope out—we are ever looking for ways to build synthetic cells together.
----
b.next is an SF-based institution focused connected realizing the imaginable of synthetic cells. We built and support Nucleus, an unfastened level for building synthetic cells, and run a manufacturing works for synthetic cells. Read much astir our communicative here and progressive programs here. Reach retired to america for thing astatine [email protected] (we emotion to collaborate).
English (US) · 
Indonesian (ID) · 
