Abstract:We review osmotic stress studies of the G-protein-coupled receptor rhodopsin. Despite the established presence of small amounts of structural water in these receptors, the influence of bulk water on their function remains unknown. Investigations of osmotic stress effects on the GPCR archetype rhodopsin have provided unique data about the role of water in receptor activation. It was discovered that osmolytes shift the rhodopsin equilibrium after photoactivation, either to the active or inactive conformations de… Show more
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