Energy transfer pathways in the CAC light-harvesting complex of Rhodomonas salina
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F20%3A43901844" target="_blank" >RIV/60076658:12310/20:43901844 - isvavai.cz</a>
Alternative codes found
RIV/61388971:_____/20:00536787
Result on the web
<a href="https://reader.elsevier.com/reader/sd/pii/S0005272820301304?token=E4092301933B14D8ED51A28F5CBAA5C1F271EDD8F3E2529F61E3C573F687245A3A2BCE82055E8191CC5526EF8B646E00" target="_blank" >https://reader.elsevier.com/reader/sd/pii/S0005272820301304?token=E4092301933B14D8ED51A28F5CBAA5C1F271EDD8F3E2529F61E3C573F687245A3A2BCE82055E8191CC5526EF8B646E00</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.bbabio.2020.148280" target="_blank" >10.1016/j.bbabio.2020.148280</a>
Alternative languages
Result language
angličtina
Original language name
Energy transfer pathways in the CAC light-harvesting complex of Rhodomonas salina
Original language description
Photosynthetic organisms had to evolve diverse mechanisms of light-harvesting to supply photosynthetic apparatus with enough energy. Cryptophytes represent one of the groups of photosynthetic organisms combining external and internal antenna systems. They contain one type of immobile phycobiliprotein located at the lumenal side of the thylakoid membrane, together with membrane-bound chlorophyll a/c antenna (CAC). Here we employ femtosecond transient absorption spectroscopy to study energy transfer pathways in the CAC proteins of cryptophyte Rhodomonas salina. The major CAC carotenoid, alloxanthin, is a cryptophyte-specific carotenoid, and it is the only naturally-occurring carotenoid with two triple bonds in its structure. In order to explore the energy transfer pathways within the CAC complex, three excitation wavelengths (505, 590, and 640 nm) were chosen to excite pigments in the CAC antenna. The excitation of Chl c at either 590 or 640 nm proves efficient energy transfer between Chl c and Chl a. The excitation of alloxanthin at 505 nm shows an active pathway from the S2 state with efficiency around 50%, feeding both Chl a and Chl c with approximately 1:1 branching ratio, yet, the S1-route is rather inefficient. The 57 ps energy transfer time to Chl a gives ~25% efficiency of the S1 channel. The low efficiency of the S1 route renders the overall carotenoid-Chl energy transfer efficiency low, pointing to the regulatory role of alloxanthin in the CAC antenna. © 2020 Elsevier B.V.
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
10606 - Microbiology
Result continuities
Project
<a href="/en/project/GA19-11494S" target="_blank" >GA19-11494S: Role of thylakoid membrane microdomains in photosynthesis</a><br>
Continuities
S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
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
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Volume of the periodical
1861
Issue of the periodical within the volume
11
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
7
Pages from-to
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UT code for WoS article
000562511300014
EID of the result in the Scopus database
2-s2.0-85089187774