Researchers at the University of Bristol in the UK have taken a giant step forward in synthetic biology by designing systems that perform several key functions in living cells, such as energy production and gene expression.

Their artificially constructed cells even changed from a spherical shape to a more natural amoeba-like shape in the first 48 hours of ‘life’. on an extended timescale”).

Building something close to what we think we live in is not an easy task. Thanks to the fact that even the simplest organisms rely on countless biochemical manipulations, including incredibly complex machines, to grow and reproduce.

Scientists have so far focused on making artificial cells perform a single function, such as gene expression, enzyme catalysis, or ribozyme activity.

If scientists unlock the secrets of custom-building and programming artificial cells that can more closely mimic life, they could create a wealth of possibilities in everything from manufacturing to medicine.

Some engineering efforts have focused on redesigning the blueprints themselves, while others are investigating ways to scrap existing cells and rebuild them into something relatively new.

To perform this latest bottom-up bioengineering feat, researchers used two bacterial colonies. Escherichia coli When Pseudomonas aeruginosa – For parts.

These two bacteria were mixed with empty microdroplets in a viscous liquid. One population was trapped within the droplet and the other on the droplet surface.

The scientists then ruptured the bacterial membrane by soaking the colonies in lysozyme (an enzyme) and melittin (a polypeptide derived from bee venom).

The bacteria spilled its contents and was captured by the droplet, creating a membrane-coated protocell.

Scientists have since demonstrated that cells are capable of complex processes such as glycolysis to generate the energy storage molecule ATP, and gene transcription and translation.

“Our living material assembly approach offers an opportunity for bottom-up construction of symbiotic living/synthetic cellular constructs,” says lead author and chemist Can Xu.

“For example, using engineered bacteria makes it possible to manufacture complex modules not only for the diagnostic and therapeutic fields of synthetic biology, but also for the development of biomanufacturing and biotechnology in general. It should be.”

In the future, this kind of synthetic cell technology could be used to improve ethanol production for biofuels and food processing.

Combined with advanced model-based knowledge of basic biology, we were able to combine some structures and completely redesign others to design entirely new systems.

Artificial cells can be programmed to photosynthesize, like purple bacteria, or to generate energy from chemicals, like sulfate-reducing bacteria.

“We expect this methodology to accommodate a high level of programmability,” said the researchers.

This paper Nature.