Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/3109
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Title

Reaction center of photosystem II with no peripheral pigments in D2 allows secondary electron transfer in D1

AuthorsArellano, Juan B. CSIC ORCID ; González Pérez, Sergio CSIC; Vácha, Frantisek; Melo, Thor Bernt; Naqvi, K. Razi
KeywordsPhotosystem II
Reaction center
beta-carotene
Chlorophyll
Issue DateDec-2007
PublisherAmerican Chemical Society
CitationBiochemistry 2007, 46, 15027-15032
AbstractA pigment-deficient reaction center of photosystem II (PSII)-with all the core pigments (two molecules of chlorophyll a and one of pheophytin a in each D protein) but with only one molecule each of peripheral chlorophyll a (Chlz) and beta-carotene (Car)-has been investigated by pump-probe spectroscopy. The data imply that Car and Chlz are both bound to D1. The absence of Car and Chlz in D2 allows the unprecedented observation of secondary electron transfer in D1 of PSII reaction centers at room temperature. The absorption band of the Car cation in D1 (Car(D1)(+·)) peaks around 910 nm (as against 990 nm for Car(D2)(+·)), and its positive hole is shared by ChlzD1, whereas Car(D2)(+·) can disappear by capturing an electron from ChlzD2.
DescriptionEl articulo está disponible en: http://pubs.acs.org/cgi-bin/article.cgi/bichaw/2007/46/i51/pdf/bi701440z.pdf. La editorial no permite la inclusión del articulo en un repositorio institucional, pero está disponible on-line para quien tenga acceso a la suscripción.
Publisher version (URL)http://pubs.acs.org/doi/abs/10.1021/bi701440z
URI10261/3109
DOI10.1021/bi701440z
Appears in Collections:(IRNASA) Artículos




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