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Light-harvesting in photosystem I

This review focuses on the light-harvesting properties of photosystem I (PSI) and its LHCI outer antenna. LHCI consists of different chlorophyll a/b binding proteins called Lhca’s, surrounding the core of PSI. In total, the PSI-LHCI complex of higher plants contains 173 chlorophyll molecules, most o...

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Autores principales: Croce, Roberta, van Amerongen, Herbert
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Netherlands 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3825136/
https://www.ncbi.nlm.nih.gov/pubmed/23645376
http://dx.doi.org/10.1007/s11120-013-9838-x
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author Croce, Roberta
van Amerongen, Herbert
author_facet Croce, Roberta
van Amerongen, Herbert
author_sort Croce, Roberta
collection PubMed
description This review focuses on the light-harvesting properties of photosystem I (PSI) and its LHCI outer antenna. LHCI consists of different chlorophyll a/b binding proteins called Lhca’s, surrounding the core of PSI. In total, the PSI-LHCI complex of higher plants contains 173 chlorophyll molecules, most of which are there to harvest sunlight energy and to transfer the created excitation energy to the reaction center (RC) where it is used for charge separation. The efficiency of the complex is based on the capacity to deliver this energy to the RC as fast as possible, to minimize energy losses. The performance of PSI in this respect is remarkable: on average it takes around 50 ps for the excitation to reach the RC in plants, without being quenched in the meantime. This means that the internal quantum efficiency is close to 100 % which makes PSI the most efficient energy converter in nature. In this review, we describe the light-harvesting properties of the complex in relation to protein and pigment organization/composition, and we discuss the important parameters that assure its very high quantum efficiency. Excitation energy transfer and trapping in the core and/or Lhcas, as well as in the supercomplexes PSI-LHCI and PSI-LHCI-LHCII are described in detail with the aim of giving an overview of the functional behavior of these complexes.
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spelling pubmed-38251362013-11-21 Light-harvesting in photosystem I Croce, Roberta van Amerongen, Herbert Photosynth Res Review This review focuses on the light-harvesting properties of photosystem I (PSI) and its LHCI outer antenna. LHCI consists of different chlorophyll a/b binding proteins called Lhca’s, surrounding the core of PSI. In total, the PSI-LHCI complex of higher plants contains 173 chlorophyll molecules, most of which are there to harvest sunlight energy and to transfer the created excitation energy to the reaction center (RC) where it is used for charge separation. The efficiency of the complex is based on the capacity to deliver this energy to the RC as fast as possible, to minimize energy losses. The performance of PSI in this respect is remarkable: on average it takes around 50 ps for the excitation to reach the RC in plants, without being quenched in the meantime. This means that the internal quantum efficiency is close to 100 % which makes PSI the most efficient energy converter in nature. In this review, we describe the light-harvesting properties of the complex in relation to protein and pigment organization/composition, and we discuss the important parameters that assure its very high quantum efficiency. Excitation energy transfer and trapping in the core and/or Lhcas, as well as in the supercomplexes PSI-LHCI and PSI-LHCI-LHCII are described in detail with the aim of giving an overview of the functional behavior of these complexes. Springer Netherlands 2013-05-04 2013 /pmc/articles/PMC3825136/ /pubmed/23645376 http://dx.doi.org/10.1007/s11120-013-9838-x Text en © The Author(s) 2013 https://creativecommons.org/licenses/by/2.0/ Open AccessThis article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.
spellingShingle Review
Croce, Roberta
van Amerongen, Herbert
Light-harvesting in photosystem I
title Light-harvesting in photosystem I
title_full Light-harvesting in photosystem I
title_fullStr Light-harvesting in photosystem I
title_full_unstemmed Light-harvesting in photosystem I
title_short Light-harvesting in photosystem I
title_sort light-harvesting in photosystem i
topic Review
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3825136/
https://www.ncbi.nlm.nih.gov/pubmed/23645376
http://dx.doi.org/10.1007/s11120-013-9838-x
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