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Google DeepMind develops invisible watermarks for AI-designed proteins

Watermarks have long protected everything from bank notes and fine art to digital photographs and software, helping prove authenticity and trace an object’s origin. Their main function is to protect copyright and verify authenticity.

That same traceability is needed in synthetic biology, where AI is now a useful research tool. To address this, Google DeepMind has introduced SynthIDBio, a method for embedding invisible signatures directly into biological sequences and 3D structures without interfering with their function.

AI is actively designing new functional proteins and predicting their three-dimensional shapes. But along with the benefits come a host of potential problems. These include biosecurity risks, such as the potential misuse of AI-designed biological molecules, and the spread of fake or misleading scientific data.

Hidden ‘funnels’ let complex systems slip between stable states

Many systems in nature can settle into several different stable states, with the final state depending on their starting conditions. However, the boundaries separating these states are often far more complicated than they first appear.

Through new research published in Physical Review Letters, researchers in Ireland and Germany, led by Serhiy Yanchuk at University College Cork, have shown that these boundaries can contain narrow, hidden pathways, allowing systems to reach stable states from starting points that simpler models would rule out entirely.

Counteranions reshape molecular packing to tune magnetism in copper complexes

Magnetic properties in molecular materials depend not only on the molecular components themselves but also on their solid-state organization. In charged π-electronic systems, electrostatic and dispersion forces can organize molecules into distinct ion-pairing structures.

Oppositely charged species may form charge-by-charge assemblies, whereas like-charged π-electronic units can, under favorable intermolecular interactions, overcome electrostatic repulsion and form stacked dimers. Because intermolecular spin–spin interactions are sensitive to the proximity and relative orientation of paramagnetic units, controlling the assembly pattern provides a route to modulating magnetic behavior.

Yet solid-state intermolecular spin–spin interactions in CuII complexes of π-electronic macrocycles have been reported only in limited cases.

Webb provides crash course on planet-shattering collisions

In the early history of our solar system, scientists theorize that a Mars-sized object called Theia smashed into the infant Earth, vaporizing massive amounts of rock and blasting it into space. Some of that material coalesced into the moon, where NASA’s Artemis program is returning humans, preparing for Mars and shaping the future of space exploration.

That long-ago, violent collision reshaped our home planet. Astronomers have used NASA’s James Webb Space Telescope to examine a class of young stellar systems that show signs of similar upheavals, providing clues to the amount of energy in their collisions. The results offer insights into the composition and evolution of these chaotic systems.

The team’s findings were published Thursday in The Astrophysical Journal.

Hearing aids show promise for cognitive recovery, but dementia prevention remains unproven

People who live long enough have a high chance of losing some of their hearing as they grow older. By age 60, about one in three adults has presbycusis, an age-related decline in hearing caused by changes inside the ear, including the loss of sensory hair cells and damage to the auditory nerve. Hearing aids can help bring sounds back into reach, making conversations easier to follow and helping older adults stay connected with the people around them. Some studies have found that hearing loss is linked to a higher risk of cognitive decline and dementia.

A recent study from China explored whether treating hearing loss with hearing aids could do more than improve hearing, potentially slowing the progression from mild cognitive problems to dementia-level impairment.

The researchers designed the two-year CHOICE trial (Chinese Hearing Solution for Improvement of Cognition in Elders) to track changes in cognitive impairment among 703 participants with both moderate-to-severe hearing loss and mild cognitive problems. Participants were randomly split into two groups: One half received hearing aids, and the other half received health education on hearing care and cognitive health.

New parallel gate entangles diamond qubits 10 times faster at room temperature

Quantum technologies rely on qubits, units of information that can exist in combinations of the states 0 and 1 instead of being limited to one or the other like conventional bits. Qubits can become entangled, which means their states become linked in ways that cannot be explained by considering each qubit separately.

A promising platform for realizing and studying entangled qubits is a nitrogen-vacancy center. This is a tiny defect in diamond in which a nitrogen atom sits beside a missing carbon atom.

In these diamond-based systems, researchers typically entangle groups of qubits through a series of gates (i.e., controlled operations), linking an electron at the defect to the nucleus of one carbon atom at a time. This process takes time and can cause crosstalk, a phenomenon in which an operation also affects qubits it was not supposed to target.

Ions help electrons hop through porous material with potential for brain-inspired computing

Next-generation computing technologies could be one step closer to emulating how neurons respond and communicate with each other, thanks to research examining how electrons and ions move through materials.

Among them, metal-organic frameworks (MOFs) are a class of materials with potential for advanced electronics.

In a recently published paper in the Journal of the American Chemical Society, Texas A&M University chemical engineering professor Dr. Perla Balbuena and postdoctoral researcher Dr. Alejandro Aviles Sanchez examined the fundamental mechanisms that govern electron and ion transport in these materials.

Small protein helps amplify cell signals from receptors targeted by many medicines

A small protein known as p11 may play a much broader role in cellular signaling than previously thought. Researchers at Karolinska institutet have now shown that p11 interacts with numerous receptors targeted by commonly used medicines, opening new possibilities for treating conditions such as pain, inflammation and depression. The research is published in the journal Science Advances.

“Cells communicate through complicated molecular networks, with most modern drugs acting by tuning these signals on or off. Our study identifies a key protein modulating signal transduction across G protein-coupled receptors, the largest receptor family in mammals. Decoding these signaling networks is essential to advance receptor biology and drive the development of next-generation therapies,” says Marcus Saarinen at the Department of Clinical Neuroscience and the lead author of the study.

New method generates nearly indistinguishable photons for quantum communication

Working in close collaboration, researchers from Paderborn University, the University of Basel and Ruhr University Bochum have made a breakthrough in quantum communication. In their recently published paper in the journal Physical Review Letters, they demonstrate how special semiconductor nanostructures can be used to generate individual photons and pairs of photons that are almost perfectly identical. These “indistinguishable” particles form the basis for quantum entanglement and quantum interference.

In quantum information processing, photons are ideal carriers of information. However, to use these light particles for complex calculations, they must possess exactly the same properties—an aspect known as “indistinguishability.” Until now, such sources have suffered from the fact that the photons generated were temporally correlated or out of focus, which greatly reduced their indistinguishability and thus their quality.

A team of doctoral candidates from Basel and Paderborn has now solved this problem using a process known as “biexciton decay” in semiconductor quantum dots within an optical resonator. This is a process in which a molecule consisting of two bound excitons (each a pair comprising an electron and an electron hole) decays, leaving behind a single exciton and a photon.

AI method predicts retention times of small molecules more reliably

Whether in drug discovery, environmental analysis or metabolomics: anyone analyzing complex biological samples often needs to identify the small molecules they contain. Researchers at Friedrich Schiller University Jena, in collaboration with partners from the Helmholtz Zentrum München and the Technical University of Munich, have developed a method that addresses a problem in analytical chemistry that has persisted for decades.

The team, led by bioinformatician Prof. Dr. Sebastian Böcker, presents the new tool in Nature Methods.

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