Design, orientation and balancing open three routes to control
An immune receptor was redesigned, a crystal's native directionality was measured, and two edges of a quantum circuit were balanced. Together, the studies show how the point of intervention changes the measure of success.
Science··Morning
Rebuilding recognition
Researchers replaced the target-selecting “integrated decoy” domain in rice's Pikm-1 immune receptor with pathogen-binding modules designed using AlphaFold 3 and BindCraft, changing recognition while preserving the signaling circuit. Of 391 receptors aimed at viral, bacterial, fungal and oomycete proteins, 71, or 18.2%, activated defense. The GRAPE directed-evolution system improved weak receptors while reducing spontaneous activation, and plants carrying optimized receptors resisted tomato brown rugose fruit virus.[1]
The direction a crystal permits
Nanoscale temperature maps in boron arsenide showed how nonequilibrium phonons redistribute along existing crystal directions. Ray-like room-temperature patterns matched first-principles Boltzmann-transport simulations, and orientation-dependent symmetry repeated across samples, extending experimentally observed phonon focusing beyond cryogenic conditions. The work does not yet provide a device that steers heat on demand, and component-level benefit remains uncertain. The signal to watch is whether the pattern survives different dimensions, defects and operating conditions and reduces a real component's hot spot.[2]
A wider operating range through balance
In the quantum-resistance experiment, a simple circuit balanced electrochemical potential across two edges of a magnetic topological insulator, stabilizing quantized transport at 4.2 kelvin and higher currents. Temperature-activated paths still prevent direct metrological-accuracy measurement of h/e²: the operating range widened without clearing the standard. Across the three studies, the control mechanism enters through target recognition, crystal orientation and edge balance. Success must therefore be tested through durable crop resistance, heat management in a real component and h/e² at the required uncertainty.[1], [2], [3]
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