Energy transfer dynamics in a red-shifted violaxanthin-chlorophyll a light-harvesting complex
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F19%3A43899105" target="_blank" >RIV/60076658:12310/19:43899105 - isvavai.cz</a>
Alternative codes found
RIV/60077344:_____/19:00511281
Result on the web
<a href="https://reader.elsevier.com/reader/sd/pii/S0005272818302494?token=A7C4463787A7854880F0719C528394B09A6E714A933DBF212A8D1D827FC699FAFEED5159ECD73B058FE7021784A4CC30" target="_blank" >https://reader.elsevier.com/reader/sd/pii/S0005272818302494?token=A7C4463787A7854880F0719C528394B09A6E714A933DBF212A8D1D827FC699FAFEED5159ECD73B058FE7021784A4CC30</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.bbabio.2018.11.006" target="_blank" >10.1016/j.bbabio.2018.11.006</a>
Alternative languages
Result language
angličtina
Original language name
Energy transfer dynamics in a red-shifted violaxanthin-chlorophyll a light-harvesting complex
Original language description
Photosynthetic eukaryotes whose cells harbor plastids originating from secondary endosymbiosis of a red alga include species of major ecological and economic importance. Since utilization of solar energy relies on the efficient light-harvesting, one of the critical factors for the success of the red lineage in a range of environments is to be found in the adaptability of the light-harvesting machinery, formed by the proteins of the light-harvesting complex (LHC) family. A number of species are known to employ mainly a unique class of LHC containing red-shifted chlorophyll a (Chl a) forms absorbing above 690 nm. This appears to be an adaptation to shaded habitats. Here we present a detailed investigation of excitation energy flow in the red-shifted light-harvesting antenna of eustigmatophyte Trachydiscus minutus using time-resolved fluorescence and ultrafast transient absorption measurements. The main carotenoid in the complex is violaxanthin, hence this LHC is labeled the red-violaxanthin-Chl a protein, rVCP. Both the carotenoid-to-Chl a energy transfer and excitation dynamics within the Chl a manifold were studied and compared to the related antenna complex, VCP, that lacks the red-Chl a. Two spectrally defined carotenoid pools were identified in the red antenna, contributing to energy transfer to Chl a, mostly via S-2 and hot S-1 states. Also, Chl a triplet quenching by carotenoids is documented. Two separate pools of red-shifted Chl a were resolved, one is likely formed by excitonically coupled Chl a molecules. The structural implications of these observations are discussed.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10608 - Biochemistry and molecular biology
Result continuities
Project
<a href="/en/project/GBP501%2F12%2FG055" target="_blank" >GBP501/12/G055: Photosynthesis Research Center</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Biochimica et Biophysica Acta - Bioenergetics
ISSN
0005-2728
e-ISSN
—
Volume of the periodical
1860
Issue of the periodical within the volume
2
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
10
Pages from-to
111-120
UT code for WoS article
000457660700001
EID of the result in the Scopus database
2-s2.0-85057056916