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Carotenoid-chlorophyll energy transfer in the fucoxanthin-chlorophyll complex binding a fucoxanthin acyloxy derivative
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SYSNO ASEP 0511275 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Carotenoid-chlorophyll energy transfer in the fucoxanthin-chlorophyll complex binding a fucoxanthin acyloxy derivative Tvůrce(i) Staleva-Musto, H. (CZ)
West, R. (CZ)
Trathnigg, M. (CZ)
Bína, David (BC-A) RID, ORCID
Litvín, Radek (BC-A) RID, ORCID
Polívka, Tomáš (BC-A) RID, ORCIDCelkový počet autorů 6 Zdroj.dok. Faraday Discussions. - : Royal Society of Chemistry - ISSN 1359-6640
Roč. 216, JUL (2019), s. 460-475Poč.str. 16 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova antenna complexes ; a-protein ; photosystem-ii Vědní obor RIV BO - Biofyzika Obor OECD Biophysics CEP GA16-10417S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora BC-A - RVO:60077344 UT WOS 000477683900023 EID SCOPUS 85068963808 DOI 10.1039/c8fd00193f Anotace The fucoxanthin-chlorophyll a protein from Emiliania huxleyi (E-FCP) is a member of the LHC family of light-harvesting proteins. It has a rather unusual pigment composition as its binds more Chl-c than Chl-a, and 19 '-hexanoyloxyfucoxanthin (hFx) as the main carotenoid instead of fucoxanthin (Fx) typically found in various FCP complexes. The presence of a hexanoyloxy tail in hFx suppresses the charge transfer character of the S-1/ICT state resulting in almost no effect of polarity on the excited state dynamics of hFx, strongly contrasting with the excited-state properties of Fx. Here we report on the dynamics of the energy transfer between hFx and Chl in E-FCP, and we compare it with Fx-Chl energy transfer in the FCP complex from Phaeodactylum tricornutum. In both complexes, the excited hFx (Fx) transfers energy from the S-2 state with a sub-100 fs time constant and no effect of the hexanoyloxy tail on the efficiency of the S-2 route was found. The energy transfer via the S-1/ICT state has in E-FCP two channels characterized by 1.5 and 11 ps time constants, while for FCP these two channels operate with time constants of 0.8 and 4.5 ps. Thus, minimizing the charge transfer character of S-1/ICT in hFx results in about twice slower energy transfer via the S-1/ICT state, underlining the importance of the ICT state in facilitating carotenoid-Chl energy transfer in systems utilizing keto carotenoids as energy donors. Pracoviště Biologické centrum (od r. 2006) Kontakt Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Rok sběru 2020 Elektronická adresa https://pubs.rsc.org/en/content/articlelanding/2019/FD/C8FD00193F#!divAbstract
Počet záznamů: 1