ArticlePhotosynthesis research2020
Sequential energy transfer driven by monoexponential dynamics in a biohybrid light-harvesting complex 2 (LH2).
Article in Photosynthesis research, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Determination of FRET orientation factor between artificial fluorophore and photosynthetic light-harvesting 2 complex (LH2).Scientific reports · 2022Article
- Ultrafast energy transfer between lipid-linked chromophores and plant light-harvesting complex II.Physical chemistry chemical physics : PCCP · 2021Article
- In situ formation of photoactive B-ring reduced chlorophyll isomer in photosynthetic protein LH2.Scientific reports · 2020Article
- Reconstitution of 3-Acetyl ChlorophyllACS omega · 2020Article
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Authors and funding
7 authors.
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Abstract
Enhancing the light-harvesting potential of antenna components in a system of solar energy conversion is an important topic in the field of artificial photosynthesis. We constructed a biohybrid light-harvesting complex 2 (LH2) engineered from Rhodobacter sphaeroides IL106 strain. An artificial fluorophore Alexa Fluor 647 maleimide (A647) was attached to the LH2 bearing cysteine residue at the N-terminal region (LH2-NC) near B800 bacteriochlorophyll a (BChl) assembly. The A647-attached LH2-NC conjugate (LH2-NC-A647) preserved the integrity of the intrinsic chromophores, B800- and B850-BChls, and carotenoids. Femtosecond transient absorption spectroscopy revealed that the sequential energy transfer A647 → B800 → B850 occurs at time scale of 9-10 ps with monoexponential dynamics in micellar and lipid bilayer systems. A B800-removed conjugate (LH2-NC[B800(-)]-A647) exhibited a significant decrease in energy transfer efficiency in the micellar system; however, surprisingly, direct energy transfer from A647 to B850 was observed at a rate comparable to that for LH2-NC-A647. This result implies that the energy transfer pathway is modified after B800 removal. The results obtained suggested that a LH2 complex is a potential platform for construction of biohybrid light-harvesting materials with simple energy transfer dynamics through the site-selective attachment of the external antennae and the modifiable energy-funnelling pathway.
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