Carotenoid to bacteriochlorophyll energy transfer in the RC-LH1-PufX complex from Rhodobacter sphaeroides containing the extended conjugation keto-carotenoid diketospirilloxanthin
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F18%3A43897833" target="_blank" >RIV/60076658:12310/18:43897833 - isvavai.cz</a>
Alternative codes found
RIV/60077344:_____/18:00495138
Result on the web
<a href="https://link.springer.com/article/10.1007%2Fs11120-017-0397-4" target="_blank" >https://link.springer.com/article/10.1007%2Fs11120-017-0397-4</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s11120-017-0397-4" target="_blank" >10.1007/s11120-017-0397-4</a>
Alternative languages
Result language
angličtina
Original language name
Carotenoid to bacteriochlorophyll energy transfer in the RC-LH1-PufX complex from Rhodobacter sphaeroides containing the extended conjugation keto-carotenoid diketospirilloxanthin
Original language description
RC-LH1-PufX complexes from a genetically modified strain of Rhodobacter sphaeroides that accumulates carotenoids with very long conjugation were studied by ultrafast transient absorption spectroscopy. The complexes predominantly bind the carotenoid diketospirilloxanthin, constituting about 75% of the total carotenoids, which has 13 conjugated C=C bonds, and the conjugation is further extended to two terminal keto groups. Excitation of diketospirilloxanthin in the RC-LH1-PufX complex demonstrates fully functional energy transfer from diketospirilloxanthin to BChl a in the LH1 antenna. As for other purple bacterial LH complexes having carotenoids with long conjugation, the main energy transfer route is via the S-2-Q(x) pathway. However, in contrast to LH2 complexes binding diketospirilloxanthin, in RC-LH1-PufX we observe an additional, minor energy transfer pathway associated with the S-1 state of diketospirilloxanthin. By comparing the spectral properties of the S-1 state of diketospirilloxanthin in solution, in LH2, and in RC-LH1-PufX, we propose that the carotenoid-binding site in RC-LH1-PufX activates the ICT state of diketospirilloxanthin, resulting in the opening of a minor S-1/ICT-mediated energy transfer channel.
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
10611 - Plant sciences, botany
Result continuities
Project
<a href="/en/project/GBP501%2F12%2FG055" target="_blank" >GBP501/12/G055: Photosynthesis Research Center</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Photosynthesis Research
ISSN
0166-8595
e-ISSN
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Volume of the periodical
135
Issue of the periodical within the volume
1-3
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
11
Pages from-to
33-43
UT code for WoS article
000423338500005
EID of the result in the Scopus database
2-s2.0-85019548228