What if cells could build their own structural framework from scratch—without the need for proteins? That’s exactly what researchers have accomplished by developing RNA origami cytoskeletons, a new type of self-assembling biological scaffold that could transform synthetic biology. This breakthrough, recently published in Nature Nanotechnology by Mai P. Tran, Taniya Chakraborty, Erik Poppleton, Luca Monari, Maja Illig, Franziska Giessler, and Kerstin Göpfrich, represents a major leap forward in designing life-like systems from the ground up.

What Are RNA Origami Cytoskeletons?

Cells rely on cytoskeletons—complex protein-based structures that provide shape, support, and movement. But proteins are difficult to engineer within artificial cells. That’s where RNA origami comes in.

Instead of using proteins, scientists have designed RNA-based scaffolds that fold into 3D nanostructures as they are synthesized. These RNA structures can self-assemble inside artificial cells, mimicking natural cytoskeletons while avoiding the complexity of protein production.

Even more impressively, these RNA scaffolds are genetically encoded, meaning that synthetic cells can produce them on demand—without the need for additional molecular machinery. This could open new doors in synthetic biology, allowing for self-replicating, evolving artificial life forms.

Why Is This a Big Deal?

Until now, most DNA or RNA-based nanostructures needed chemical synthesis and complex assembly steps. This research demonstrates, for the first time, that RNA cytoskeletons can be directly produced inside lipid vesicles (artificial cells) using a simple DNA template and an enzyme.

The ability to engineer synthetic cells that build their own internal framework has incredible implications for:

• Biotechnology – Custom-designed artificial cells could be used to produce drugs, detect diseases, or even repair damaged tissues.
• Origins of Life Research – This could help scientists understand how early life forms may have functioned before complex proteins evolved.
• Cellular Engineering – Synthetic cells could one day be designed for biocompatible implants or self-replicating nanomachines.

How It Works

The researchers encapsulated a DNA template and RNA polymerase inside artificial lipid vesicles (known as giant unilamellar vesicles, or GUVs). When nucleotides were added externally, the RNA was transcribed, folded, and self-assembled into microscopic RNA nanotubes—similar in function to the protein cytoskeletons found in living cells.

They even found that small mutations in the DNA sequence led to different structural phenotypes, from long RNA nanotubes to ring-shaped RNA assemblies. This suggests that these synthetic structures could be evolved and optimized over time—a key feature for building self-sustaining artificial cells.

A Step Toward Synthetic Life?

One of the most exciting aspects of this study is how RNA-based structures bypass the need for proteins, which require an enormous molecular toolkit to produce. This research hints at a possible alternative to the classic “central dogma” of biology (where DNA makes RNA, which makes proteins). Instead, these synthetic cells use RNA directly as both genetic information and functional hardware.

The ability to encode and evolve RNA-based cellular components could lead to self-sustaining synthetic life forms, capable of adapting to different environments.

What’s Next?

The next steps for RNA origami cytoskeletons could involve:

• Developing RNA-based molecular machines to further expand the capabilities of artificial cells.
• Creating self-replicating systems where synthetic cells produce their own RNA templates.
• Exploring biomedical applications such as targeted drug delivery or biosensing.

The work of Tran et al. lays the foundation for a new generation of bioengineered cells—cells that can build, evolve, and potentially interact with the natural world in ways we’re only beginning to imagine.

Could RNA origami be the missing link in building synthetic life? This research suggests we might be closer than ever.

Source: https://www.nature.com/articles/s41565-025-01879-3
Mai P. Tran, Taniya Chakraborty, Erik Poppleton, Luca Monari, Maja Illig, Franziska Giessler & Kerstin Göpfrich. Nature Nanotechnology, 2025.