Počet záznamů: 1

Absorption Linear Dichroism Measured Directly on a Single Light-Harvesting System: The Role of Disorder in Chlorosomes of Green Photosynthetic Bacteria

  1. 1.
    0367259 - BC-A 2012 RIV US eng J - Článek v odborném periodiku
    Furumaki, S. - Vácha, František - Habuchi, S. - Tsukatani, Y. - Bryant, D.A. - Vácha, M.
    Absorption Linear Dichroism Measured Directly on a Single Light-Harvesting System: The Role of Disorder in Chlorosomes of Green Photosynthetic Bacteria.
    Journal of the American Chemical Society. Roč. 133, č. 17 (2011), s. 6703-6710 ISSN 0002-7863
    Grant CEP: GA ČR GA206/09/0375
    Výzkumný záměr: CEZ:AV0Z50510513
    Klíčová slova: CHLOROBIUM-TEPIDUM * BACTERIOCHLOROPHYLL-C * SUPRAMOLECULAR ORGANIZATION
    Kód oboru RIV: EF - Botanika
    Impakt faktor: 9.907, rok: 2011

    Chlorosomes are light-harvesting antennae of photosynthetic bacteria containing large numbers of self-aggregated bacteriochlorophyll (BChl) molecules. They have developed unique photophysical properties that enable them to absorb light and transfer the excitation energy with very high efficiency. However, the molecular-level organization, that produces the photophysical properties of BChl molecules in the aggregates, is still not fully understood. One of the reasons is heterogeneity in the chlorosome structure which gives rise to a hierarchy of structural and energy disorder. In this report, we for the first time directly measure absorption linear dichroism (LD) on individual, isolated chlorosomes. Together with fluorescence-detected three-dimensional LD, these experiments reveal a large amount of disorder on the single-chlorosome level in the form of distributions of LD observables in chlorosomes from wild-type bacterium Chlorobaculum tepidum.
    Trvalý link: http://hdl.handle.net/11104/0202002