Počet záznamů: 1  

Highly efficient energy transfer from a carbonyl carotenoid to chlorophyll a in the main light harvesting complex of Chromera velia

  1. 1.
    0433725 - BC 2015 RIV NL eng J - Článek v odborném periodiku
    Durchan, Milan - Kesan, G. - Šlouf, M. - Fuciman, M. - Staleva, H. - Tichý, Josef - Litvín, Radek - Bína, David - Vácha, František - Polívka, Tomáš
    Highly efficient energy transfer from a carbonyl carotenoid to chlorophyll a in the main light harvesting complex of Chromera velia.
    Biochimica Et Biophysica Acta-Bioenergetics. Roč. 1837, č. 10 (2014), s. 1748-1755. ISSN 0005-2728. E-ISSN 1879-2650
    Grant CEP: GA ČR(CZ) GAP205/11/1164; GA ČR GBP501/12/G055
    Institucionální podpora: RVO:60077344
    Klíčová slova: Energy transfer * Light-harvesting * Carbonyl carotenoids
    Kód oboru RIV: BO - Biofyzika
    Impakt faktor: 5.353, rok: 2014

    We report on energy transfer pathways in the main light-harvesting complex of photosynthetic relative of apicomplexan parasites, Chromera velia. This complex, denoted CLH, belongs to the family of FCP proteins and contains chlorophyll (Chl) a, violaxanthin, and the so far unidentified carbonyl carotenoid related to isofucoxanthin. The overall carotenoid-to-Chl-a energy transfer exhibits efficiency over 90% which is the largest among the FCP-like proteins studied so far. Three spectroscopically different isofucoxanthin-like molecules were identified in CLH, each having slightly different energy transfer efficiency that increases from isofucoxanthin-like molecules absorbing in the blue part of the spectrum to those absorbing in the reddest part of spectrum. Part of the energy transfer from carotenoids proceeds via the ultrafast S-2 channel of both the violaxanthin and isofucoxanthin-like carotenoid, but major energy transfer pathway proceeds via the S-1/ICT state of the isofucoxanthin-like carotenoid.
    Trvalý link: http://hdl.handle.net/11104/0237876

     
     
Počet záznamů: 1  

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