Terahertz Induced Protein Interactions in a Random Medium

Folding of proteins into their correct native structure is key to their function. Simultaneously, the intricate interplay between cell movement and protein conformation highlights the complex nature of cellular processes. In this work, we demonstrate the impact of Terahertz (THz) signaling on controlling protein conformational changes in a random medium. Our system of interest consists of a communication link that involves a nanoantenna transmitter, a protein receiver, and a channel composed of moving red blood cells. Due to the system dynamics, we investigate the influence of both the fast and slow channel variations on protein folding. Specifically, we analyze the system's selectivity to asses the effectiveness of the induced THz interaction in targeting a specific group of proteins under fading conditions. By optimizing the selectivity metric with respect to the nanoantenna power and frequency, it is possible to enhance the controllability of protein interactions. Our probabilistic analysis provides a new perspective regarding electromagnetically triggered protein molecules, their microenvironment and their interaction with surrounding particles. It helps elucidate how external conditions impact the protein folding kinetics and pathways. This results in not only understanding the mechanisms underlying THz-induced protein interactions but also engineering these still-emerging tools.Comment: Accepted for publication in the IEEE Transactions on Molecular, Biological and Multi-Scale Communication

Together We Stand – Analyzing Schooling Behavior in Naive Newborn Guppies through Biorobotic Predators

A major advantage of animal aggregations concerns cooperative antipredator strategies. Schooling behavior emerges earlier in many fish species, especially in those cannibalizing their offspring. Experience is fundamental for developing schooling behavior. However, the cognitive ability of naive newborn fish to aggregate remains unclear. Herein, Poecilia reticulata, was selected as model organism to investigate how combinations of biomimetic robotic agents and adult conspecific olfactory cues affect collective responses in newborns. The role of white and brown backgrounds in evoking aggregations was also assessed. Olfactory cues were sufficient for triggering aggregations in P. reticulata newborns, although robotic agents had a higher influence on the group coalescence. The combination of robotic agents and olfactory cues increased schooling behavior duration. Notably, schooling was longer in the escape compartment when robotic agents were presented, except for the combination of the male-mimicking robotic fish plus adult guppy olfactory cues, with longer schooling behavior in the exploring compartment. Regardless of the tested cues, newborn fish aggregated preferentially on the brown areas of the arena. Overall, this research provides novel insights on the early collective cognitive ability of newborn fish, paving the way to the use of biomimetic robots in behavioral ecology experiments, as substitutes for real predators