Structural basis of ultraviolet sensitivity and gating in an anion-conducting apusomonad rhodopsin
Ultraviolet-sensitive anion rhodopsin channels expanded the spectral range of light-gated ion transport, but how they combine a deprotonated retinal Schiff base with anion conduction remains unclear. Here we report the cryo-electron microscopy structure of the apusomonad rhodopsin SfApuR2 and combine constant-pH molecular dynamics with electrophysiological analysis of mutants. The trimeric…
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