Origin of the Two Bands in the B800 Ring and Their Involvement in the Energy Transfer Network of Allochromatium vinosum
Schröter, Marco LU ; Alcocer, Marcelo J.P. LU ; Cogdell, Richard J. ; Kühn, Oliver and Zigmantas, Donatas LU
(2018)
In Journal of Physical Chemistry Letters
9(6).
p.1340-1345
- Abstract
Bacterial photosynthesis features robust and adaptable energy-harvesting processes in which light-harvesting proteins play a crucial role. The peripheral light-harvesting complex of the purple bacterium Allochromatium vinosum is particularly distinct, featuring a double peak structure in its B800 absorption band. Two hypotheses - not necessarily mutually exclusive - concerning the origin of this splitting have been proposed; either two distinct B800 bacteriochlorophyll site energies are involved, or an excitonic dimerization of bacteriochlorophylls within the B800 ring takes place. Through the use of two-dimensional electronic spectroscopy, we present unambiguous evidence that excitonic interaction shapes the split band. We further... (More)
Bacterial photosynthesis features robust and adaptable energy-harvesting processes in which light-harvesting proteins play a crucial role. The peripheral light-harvesting complex of the purple bacterium Allochromatium vinosum is particularly distinct, featuring a double peak structure in its B800 absorption band. Two hypotheses - not necessarily mutually exclusive - concerning the origin of this splitting have been proposed; either two distinct B800 bacteriochlorophyll site energies are involved, or an excitonic dimerization of bacteriochlorophylls within the B800 ring takes place. Through the use of two-dimensional electronic spectroscopy, we present unambiguous evidence that excitonic interaction shapes the split band. We further identify and characterize all of the energy transfer pathways within this complex by using a global kinetic fitting procedure. Our approach demonstrates how the combination of two-dimensional spectral resolution and self-consistent fitting allows for extraction of information on light-harvesting processes, which would otherwise be inaccessible due to signal congestion.
(Less)
- author
- Schröter, Marco
LU
; Alcocer, Marcelo J.P.
LU
; Cogdell, Richard J.
; Kühn, Oliver
and Zigmantas, Donatas
LU
- organization
- publishing date
- 2018-03-15
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Physical Chemistry Letters
- volume
- 9
- issue
- 6
- pages
- 6 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- pmid:29488385
- scopus:85044006995
- ISSN
- 1948-7185
- DOI
- 10.1021/acs.jpclett.8b00438
- language
- English
- LU publication?
- yes
- id
- 1fff63fb-1250-4865-a4a2-c921319ebc23
- date added to LUP
- 2018-03-29 08:32:45
- date last changed
- 2024-06-25 14:53:17
@article{1fff63fb-1250-4865-a4a2-c921319ebc23,
abstract = {{<p>Bacterial photosynthesis features robust and adaptable energy-harvesting processes in which light-harvesting proteins play a crucial role. The peripheral light-harvesting complex of the purple bacterium Allochromatium vinosum is particularly distinct, featuring a double peak structure in its B800 absorption band. Two hypotheses - not necessarily mutually exclusive - concerning the origin of this splitting have been proposed; either two distinct B800 bacteriochlorophyll site energies are involved, or an excitonic dimerization of bacteriochlorophylls within the B800 ring takes place. Through the use of two-dimensional electronic spectroscopy, we present unambiguous evidence that excitonic interaction shapes the split band. We further identify and characterize all of the energy transfer pathways within this complex by using a global kinetic fitting procedure. Our approach demonstrates how the combination of two-dimensional spectral resolution and self-consistent fitting allows for extraction of information on light-harvesting processes, which would otherwise be inaccessible due to signal congestion.</p>}},
author = {{Schröter, Marco and Alcocer, Marcelo J.P. and Cogdell, Richard J. and Kühn, Oliver and Zigmantas, Donatas}},
issn = {{1948-7185}},
language = {{eng}},
month = {{03}},
number = {{6}},
pages = {{1340--1345}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Journal of Physical Chemistry Letters}},
title = {{Origin of the Two Bands in the B800 Ring and Their Involvement in the Energy Transfer Network of Allochromatium vinosum}},
url = {{http://dx.doi.org/10.1021/acs.jpclett.8b00438}},
doi = {{10.1021/acs.jpclett.8b00438}},
volume = {{9}},
year = {{2018}},
}