Differential sensitivity to oxygen among the bacteriochlorophylls g in the type-I reaction centers of Heliobacterium modesticaldum
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F21%3A00603873" target="_blank" >RIV/60077344:_____/21:00603873 - isvavai.cz</a>
Result on the web
<a href="https://link.springer.com/article/10.1007/s43630-021-00049-3" target="_blank" >https://link.springer.com/article/10.1007/s43630-021-00049-3</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s43630-021-00049-3" target="_blank" >10.1007/s43630-021-00049-3</a>
Alternative languages
Result language
angličtina
Original language name
Differential sensitivity to oxygen among the bacteriochlorophylls g in the type-I reaction centers of Heliobacterium modesticaldum
Original language description
The type-I, homodimeric photosynthetic reaction center (RC) of Heliobacteria (HbRC) is the only known RC in which bacteriochlorophyll g (BChl g) is found. It is also simpler than other RCs, having the smallest number of protein subunits and bound chromophores of any type-I RC. In the presence of oxygen, BChl g isomerizes to 8(1)-hydroxychlorophyll a(F) (Chl a(F)). This naturally occurring process provides a way of altering the chlorophylls and studying the effect of these changes on energy and electron transfer. Transient absorbance difference spectroscopy reveals that triplet-state formation occurs in the antenna chlorophylls of HbRCs but does not provide site-specific information. Here, we report on an extended optically detected magnetic resonance (ODMR) study of the antenna triplet states in HbRCs with differing levels of conversion of BChl g to Chl a(F). The data reveal pools of BChl g molecules with different triplet zero-field splitting parameters and different susceptibilities to chemical oxidation. By relating the detailed spectroscopic characteristics derived from the ODMR data to the recently solved crystallographic structure, we have tentatively identified BChl g molecules in which the probability of triplet formation is high and sites at which BChl g conversion is more likely, providing useful information about the fate of the excitation in the complex.
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
10610 - Biophysics
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Photochemical & Photobiological Sciences
ISSN
1474-905X
e-ISSN
1474-9092
Volume of the periodical
20
Issue of the periodical within the volume
6
Country of publishing house
FR - FRANCE
Number of pages
13
Pages from-to
747-759
UT code for WoS article
000652468100001
EID of the result in the Scopus database
2-s2.0-85106058466