Enhancement of carotenoid-to-chlorophyll singlet energy transfer by carotenoid-carotenoid interaction
نویسندگان
چکیده
منابع مشابه
Carotenoid Composition of Chlorophyll-Carotenoid-Proteins from Radish Chloroplasts
Raphanus sativus L., /7-Carotene, Carotenoid Composition, Chlorophyll a-Proteins, LightHarvesting Chlorophyll, Localization of Carotenoids, Lutein, Neoxanthin The uneven distribution of carotenoids and chlorophylls between several chlorophyllcarotenoid-proteins isolated from radish chloroplasts by SDS-polyacrylamide-gel electrophoresis is described. Lutein and neoxanthin are enriched in the lig...
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Understanding of the widespread biological importance of carotenoids is increasing. Accompanying this is the developing recognition that the interaction of carotenoids with other molecules, such as proteins, is also essential. Here the significance of carotenoid-protein interactions with respect to biological function is reviewed for three well characterised carotenoprotein complexes; crustacya...
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Harnessing light for energy gives photosynthetic organisms free energy—great, right? Well, like so many free things, too much of a good thing can turn into a bad thing, like a drought-ending rain that turns into a levybreaching flood. The photosynthetic apparatus, beautifully adapted to capture light, can incur serious damage when too much light energy floods in. Given the variability of light ...
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Carotenoids are, along with chlorophylls, crucial pigments involved in light-harvesting processes in photosynthetic organisms. Details of carotenoid to chlorophyll energy transfer mechanisms and their dependence on structural variability of carotenoids are as yet poorly understood. Here, we employ femtosecond transient absorption spectroscopy to reveal energy transfer pathways in the peridinin-...
متن کاملAn anomalous distance dependence of intraprotein chlorophyll-carotenoid triplet energy transfer.
In the light-harvesting chlorophyll pigment-proteins of photosynthesis, a carotenoid is typically positioned within a distance of ;4 Å of individual chlorophylls or antenna arrays, allowing rapid triplet energy transfer from chlorophyll to the carotenoid. This triplet energy transfer prevents the formation of toxic singlet oxygen. In the cytochrome b6f complex of oxygenic photosynthesis that co...
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ژورنال
عنوان ژورنال: Biophysical Journal
سال: 1992
ISSN: 0006-3495
DOI: 10.1016/s0006-3495(92)81952-5