In a University of Washington laboratory, researchers have found a way to bring dormant proteins back to life with nothing more than a flash of light. Protein fragments, chemically prepared and suspended in a gel or within living human cells, join together into complete, working molecules wherever the beam falls, and nowhere else. The discovery belongs to a longer human effort to govern biology from the outside, to decide when and where life's molecular machinery should act, with the hope that such precision might one day help rebuild tissues and correct genes. For now it remains a promise sho
Light-Activated SpyLigation Switches On Proteins Inside and Outside Living Cells
A glowing 3D dog not much taller than a human hair
Mark
So what actually happened here? Light turned proteins on?
Mimi
Yes. The team took inactive protein fragments, modified chemically, and used laser light to join them into whole, working proteins. They drew a husky in a gel that way.
Mark
Why a glowing eel protein?
Mimi
It's a visible readout. If the fragments join, the gel glows, so you can see exactly where the reaction happened.
Luke
Worth saying that the glow is a demonstration. It shows the joining works and can be patterned. It isn't itself a therapy.
Mark
And inside cells?
Mimi
They switched on proteins involved in genome editing in human cells with three minutes of light.
Luke
Three minutes in cultured cells. The source doesn't say how efficient it was, or what happens in tissue or a living body. The idea of directing genetic changes to specific body regions is stated as something that could happen one day.
Mark
Why compare it to click chemistry?
Mimi
Both let modified proteins react with each other inside living systems. The addition here is control over when and where.
Luke
Fair, but the comparison is about the type of chemistry. The Nobel doesn't speak to this work's results.
Mark
And the organ shortage claim?
Mimi
DeForest says the tools move them toward engineering complex tissue for transplantation.
Luke
That's a stated goal and his view of the promise. Nothing reported here shows engineered tissue being made or transplanted.
Il Polso
- Inactive protein fragments sit dark in a gel until a laser pulse stitches them into glowing, fully working proteins.
- The same light trick works inside living human cells, switching on genome-editing proteins after only three minutes of exposure.
- Because the beam's path sets the pattern, researchers can draw shapes in matter, from a husky mascot to a dog thinner than a hair.
- The team, led by DeForest's group, is pushing the method toward tissue engineering to address the gap between organ need and donor supply.
- The work remains early-stage lab evidence, and whether it can build transplantable tissue or edit genes inside a body is still untested.
In a University of Washington laboratory, researchers have found a way to bring dormant proteins back to life with nothing more than a flash of light. Protein fragments, chemically prepared and suspended in a gel or within living human cells, join together into complete, working molecules wherever the beam falls, and nowhere else. The discovery belongs to a longer human effort to govern biology from the outside, to decide when and where life's molecular machinery should act, with the hope that such precision might one day help rebuild tissues and correct genes. For now it remains a promise shown in small, careful experiments, and the larger question of whether the light can reach the body itself is still waiting to be answered.
At the University of Washington, a laboratory gel holding broken pieces of a glowing protein was placed under a laser. Where the beam crossed, the fragments fused into whole, luminous proteins. Where it did not, the gel stayed dark. The image that emerged was a husky, the university's mascot, drawn at a microscopic scale.
The method is called light-activated SpyLigation. Using brief flashes of light, it turns on proteins that are normally switched off, both outside and inside living cells. The work, led by Emily Ruskowitz and Brizzia Munoz-Robles of the DeForest Research Group under senior author Cole A. DeForest, was published April 17 in Nature Chemistry. The team used a green fluorescent protein originally drawn from the muscle of a Japanese eel, blending its inactive fragments into the gel and recombining them irreversibly with lasers. Since the beam's path determines where the proteins form, the researchers could choose the pattern, producing a flat husky and even a glowing three-dimensional dog not much taller than a human hair.
The researchers also achieved activation inside human cells. Three minutes of light was enough to switch on specific proteins involved in genome editing, suggesting that such a tool might someday guide genetic changes to precise parts of the body.
Proteins govern nearly every essential task in biology, and scientists increasingly ask whether their activity can be turned on and off to treat disease. SpyLigation echoes click chemistry, the subject of the 2022 Nobel Prize, but adds control over exactly when and where the reactions occur. DeForest sees this as a step toward engineering complex tissue for transplant, a response to the many patients who need organs and tissues far more often than donors can provide them. These are laboratory demonstrations so far, and the next studies must show whether the approach can truly build tissue or edit genes within the living body.
In a lab at the University of Washington, researchers set a Jell-O-like gel holding inactive protein fragments under a laser and drew a husky into it. Where the beam passed, the fragments joined into whole proteins that glowed. Where it didn't, the gel stayed dark. The husky is the university's mascot, and the image was microscopic.
The technique is called light-activated SpyLigation. It lets scientists turn on proteins that are normally switched off, both inside and outside living cells, using brief flashes of light. The team reported the work on April 17 in the journal Nature Chemistry.
The research was led by Emily Ruskowitz and Brizzia Munoz-Robles of the DeForest Research Group. Their senior author is Cole A. DeForest, a Weyerhaeuser Endowed Associate Professor of Chemical Engineering at the University of Washington College of Engineering. He is also an associate professor of bioengineering, a joint department of the College of Engineering and the School of Medicine. The team showed that chemically modified protein fragments can be stitched into functional wholes with short pulses of light.
For the demonstration, they used a green fluorescent protein derived from the muscle of a Japanese eel. They blended inactive fragments of it into the gel, then used lasers to recombine them irreversibly into complete, glowing proteins. Because the laser's path determines where the proteins form, the team could dictate the pattern. Besides the flat husky image, they made a glowing three-dimensional dog not much taller than a human hair.
The work was not confined to gels. The researchers also activated proteins inside human cells. Three minutes of light exposure was enough to switch on specific proteins involved in genome editing. The source says such a tool could one day direct genetic changes to very specific areas of the body.
The background matters here. Proteins carry out nearly every key task in biology, from processing DNA and metabolizing nutrients to fighting infection. When, where and how they become active shapes many biological processes, and scientists are increasingly asking whether protein function can be switched on and off to treat disease.
SpyLigation resembles click chemistry, the subject of the 2022 Nobel Prize in Chemistry, in that modified proteins react with one another inside living systems. The new method goes beyond earlier approaches by controlling precisely when and where those reactions happen.
DeForest tied the work to tissue engineering. Tools that offer controlled activation in time and space, he said, move the field toward engineering complex tissue for transplantation. He pointed out that many more people could benefit from tissue or organ transplants than there are donors, and said these methods hold real promise against the organ shortage.
The results so far are laboratory demonstrations: a glowing protein in a gel and activated genome-editing proteins in human cells. Whether the approach can build transplantable tissue or direct genetic changes in the body is the question the next studies will have to answer.
Citazioni salienti
Tools offering controlled activation in time and space move the field toward engineering complex tissue for transplantation, and could help combat the organ shortage.— Cole A. DeForest, senior author, University of Washington (paraphrased)
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