Počet záznamů: 1

The effects of light-induced reduction of the photosystem II reaction center

  1. 1.
    0341236 - UEK-B 2010 RIV US eng J - Článek v odborném periodiku
    Kutý, Michal
    The effects of light-induced reduction of the photosystem II reaction center.
    Journal of Molecular Modeling. Roč. 8, č. 15 (2009), s. 923-933 ISSN 1610-2940
    Grant CEP: GA MŠk(CZ) LC06010
    Výzkumný záměr: CEZ:AV0Z60870520
    Klíčová slova: Photosystem II * Reaction center * Pheophytin
    Kód oboru RIV: CE - Biochemie
    Impakt faktor: 2.336, rok: 2009

    Accumulation of reduced pheophytin a (Pheo-D1) in photosystem II reaction center (PSII RC) under illumination at low redox potential is accompanied by changes in absorbance and circular dichroism spectra. The temperature dependences of these spectral changes have the potential to distinguish between changes caused by the excitonic interaction and temperature-dependent processes. We observed a conformational change in the PSII RC protein part and changes in the spatial positions of the PSII RC pigments of the active D1 branch upon reduction of Pheo-D1 only in the case of high temperature (298 K) dynamics. The resulting absorption difference spectra of PSII RC models equilibrated at temperatures of 77K and 298K were highly consistent with our previous experiments in which light-induced bleaching of the PSII RC absorbance spectrum was observable only at 298K.
    Trvalý link: http://hdl.handle.net/11104/0184285