Carotenoid-protein interaction alters the S(1) energy of hydroxyechinenone in the Orange Carotenoid Protein.

@article{Polvka2013CarotenoidproteinIA,
  title={Carotenoid-protein interaction alters the S(1) energy of hydroxyechinenone in the Orange Carotenoid Protein.},
  author={Tom{\'a}{\vs} Pol{\'i}vka and Pavel Ch{\'a}bera and Cheryl A. Kerfeld},
  journal={Biochimica et biophysica acta},
  year={2013},
  volume={1827 3},
  pages={248-54}
}
The Orange Carotenoid Protein (OCP) is a photoactive water soluble protein that is crucial for photoprotection in cyanobacteria. When activated by blue-green light, it triggers quenching of phycobilisome fluorescence and regulates energy flow from the phycobilisome to the reaction center. The OCP contains a single pigment, the carotenoid 3'-hydroxyechinenone (hECN). Binding to the OCP causes a conformational change in hECN leading to an extension of its effective conjugation length. We have… CONTINUE READING

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