The LOV Domain Family: Photoresponsive Signaling Modules Coupled to Diverse Output Domains
Here, we review the properties of the light, oxygen, or voltage (LOV) family of blue-light photoreceptor domains, a subset of the Per-ARNT-Sim (PAS) superfamily. These flavin-binding domains, first identified in the higher-plant phototropins, are now shown to be present in plants, fungi, and bacteria. Notably, LOV domains are coupled to a wide array of other domains, including kinases, phosphodiesterases, F-box domains, STAS domains, and zinc fingers, which suggests that the absorption of blue light by LOV domains regulates the activity of these structurally and functionally diverse domains.
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