6533b7dafe1ef96bd126ecd5
RESEARCH PRODUCT
Tips and turns of bacteriophytochrome photoactivation
Heikki TakalaHeikki TakalaSebastian WestenhoffPetra EdlundJanne A. Ihalainensubject
Models MolecularProtein Conformation116 Chemical sciencesHISTIDINE KINASESSIGNAL-TRANSDUCTIONfotobiologiabacteriophytochrome photoactivation010402 general chemistry01 natural sciencesbakteeritPhytochrome B03 medical and health sciencesProtein structureBacterial ProteinsINDUCED PROTON RELEASEPHYTOCHROME-BCRYSTAL-STRUCTUREPhysical and Theoretical Chemistry030304 developmental biologyINDUCED CONFORMATIONAL-CHANGESPhysics0303 health sciencesRESONANCE RAMANMechanism (biology)AGROBACTERIUM-TUMEFACIENSPhotochemical ProcessesMolecular machine0104 chemical sciencesINFRARED FLUORESCENT PROTEINSCHROMOPHORE-BINDING DOMAINBiophysics1182 Biochemistry cell and molecular biologyvalokemiaproteiinitPhytochromeSignal Transductiondescription
Phytochromes are ubiquitous photosensor proteins, which control the growth, reproduction and movement in plants, fungi and bacteria. Phytochromes switch between two photophysical states depending on the light conditions. In analogy to molecular machines, light absorption induces a series of structural changes that are transduced from the bilin chromophore, through the protein, and to the output domains. Recent progress towards understanding this structural mechanism of signal transduction has been manifold. We describe this progress with a focus on bacteriophytochromes. We describe the mechanism along three structural tiers, which are the chromophore-binding pocket, the photosensory module, and the output domains. We discuss possible interconnections between the tiers and conclude by presenting future directions and open questions. We hope that this review may serve as a compendium to guide future structural and spectroscopic studies designed to understand structural signaling in phytochromes. Peer reviewed
year | journal | country | edition | language |
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2020-10-28 | Photochemical & Photobiological Sciences |