Photoactivation of the orange carotenoid protein requires two light-driven reactions mediated by a metastable monomeric intermediate
Justin B. Rose, José A. Gascón, Markus Sutter, Damien I. Sheppard, Cheryl A. Kerfeld, Warren F. Beck
Abstract
product state owing to displacement of the C-terminal domain and the translocation of canthaxanthin more than 12 Å into the N-terminal domain. Both steps in the photoactivation reaction of OCP are likely to involve changes in the structure of the C-terminal domain elicited by excited-state conformational motions of the ketocarotenoid.
Topics & Concepts
PhotochemistryChromophoreDimerChemistryMonomerCanthaxanthinAbsorption spectroscopyPhotodissociationAbsorption (acoustics)CrystallographyAstaxanthinMaterials scienceCarotenoidOrganic chemistryPhysicsFood scienceQuantum mechanicsComposite materialPolymerPhotosynthetic Processes and MechanismsAntioxidant Activity and Oxidative StressAlgal biology and biofuel production