Role of Carotenoids in Light-Harvesting Processes in an Antenna Protein from the Chromophyte Xanthonema debile

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F12%3A00381460" target="_blank" >RIV/60077344:_____/12:00381460 - isvavai.cz</a>
Alternative codes found
RIV/60076658:12310/12:43883428
Result on the web
<a href="http://dx.doi.org/10.1021/jp3042796" target="_blank" >http://dx.doi.org/10.1021/jp3042796</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/jp3042796" target="_blank" >10.1021/jp3042796</a>

Result language
angličtina
Original language name
Role of Carotenoids in Light-Harvesting Processes in an Antenna Protein from the Chromophyte Xanthonema debile
Original language description
We employed femtosecond transient absorption spectroscopy to study energy transfer pathways in the main light-harvesting complex of Xanthonema debile, denoted XLH, which contains four carotenoids, diadinoxanthin, heteroxanthin, diatoxanthin and vaucheriaxanthin, and Chl-a. Overall carotenoid-to-chlorophyll energy transfer efficiency is about 60%, but energy transfer pathways are excitation wavelength dependent. Energy transfer from the carotenoid S2 state is active after excitation at both 490 nm (maximum of carotenoid absorption) and 510 nm (red edge of carotenoid absorption), but this channel is significantly more efficient after 510 nm excitation. Concerning the energy transfer pathway from the S1 state, XLH contains two groups of carotenoids: thosethat have the S1 route active (25%) and those having the S1 pathway silent. Besides the light-harvesting function, carotenoids in XLH also have photoprotective role; they quench Chl-a triplets via triplet-triplet energy transfer from Chl
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BO - Biophysics
OECD FORD branch
—

Project
<a href="/en/project/GAP205%2F11%2F1164" target="_blank" >GAP205/11/1164: Excitation energy transfer in pigment-protein complexes of microorganisms</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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