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Qutbuddin, Yusuf; Guinart, Ainoa; Gavrilović, Svetozar; Al Nahas, Kareem; Feringa, Ben L.; Schwille, Petra
Advanced materials (Weinheim) 36, Issue: 16Journal Article
Membranes are the key structures to separate and spatially organize cellular systems. Their rich dynamics and transformations during the cell cycle are orchestrated by specific membrane‐targeted molecular machineries, many of which operate through energy dissipation. Likewise, man‐made light‐activated molecular rotary motors have previously shown drastic effects on cellular systems, but their physical roles on and within lipid membranes remain largely unexplored. Here, the impact of rotary motors on well‐defined biological membranes is systematically investigated. Notably, dramatic mechanical transformations are observed in these systems upon motor irradiation, indicative of motor‐induced membrane expansion. The influence of several factors on this phenomenon is systematically explored, such as motor concentration and membrane composition., Membrane fluidity is found to play a crucial role in motor‐induced deformations, while only minor contributions from local heating and singlet oxygen generation are observed. Most remarkably, the membrane area expansion under the influence of the motors continues as long as irradiation is maintained, and the system stays out‐of‐equilibrium. Overall, this research contributes to a comprehensive understanding of molecular motors interacting with biological membranes, elucidating the multifaceted factors that govern membrane responses and shape transitions in the presence of these remarkable molecular machines, thereby supporting their future applications in chemical biology. Explore the nuanced relationship between light‐driven molecular motors and lipid membranes in this research. Delve into the continuous interplay, observing how these motors, akin to dynamic springs fueled by light, orchestrate subtle yet fascinating shape transitions in membranes. Observe how these out‐of‐equilibrium systems can modulate area expansion through their action in lipid membranes.
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