Design principles of solar light harvesting in plants: Functional architecture of the monomeric antenna CP29
| Autor: | Nicoletta Liguori, Roberta Croce, Pengqi Xu, Vladimir I. Novoderezhkin, Vincenzo Mascoli |
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| Přispěvatelé: | Biophysics Photosynthesis/Energy, LaserLaB - Energy |
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Photosynthetic reaction centre Chlorophyll Models Molecular Photosystem II Exciton Biophysics Light-Harvesting Protein Complexes Energy flux 010402 general chemistry 01 natural sciences Biochemistry 03 medical and health sciences SDG 7 - Affordable and Clean Energy Common emitter Physics Electronic spectroscopy Energy landscape Photosystem II Protein Complex Cell Biology Exciton modeling Plants Mutational analysis 0104 chemical sciences Light harvesting Chemical energy 030104 developmental biology Energy Transfer Energy transfer Chemical physics Mutation Sunlight Thermodynamics Chlorophyll Binding Proteins |
| Zdroj: | Mascoli, V, Novoderezhkin, V, Liguori, N, Xu, P & Croce, R 2020, ' Design principles of solar light harvesting in plants : Functional architecture of the monomeric antenna CP29 ', Biochimica et Biophysica Acta-Bioenergetics, vol. 1861, no. 3, 148156, pp. 1-13 . https://doi.org/10.1016/j.bbabio.2020.148156 Biochimica et Biophysica Acta-Bioenergetics, 1861(3):148156, 1-13. Elsevier Biochimica et Biophysica Acta (BBA)-Bioenergetics |
| ISSN: | 1879-2650 0005-2728 |
| Popis: | In plants and green algae, light-harvesting complexes (LHCs) are a large family of chlorophyll binding proteins functioning as antennae, collecting solar photons and transferring the absorbed energy to the photosynthetic reaction centers, where light to chemical energy conversion begins. Although LHCs are all highly homologous in their structure and display a variety of common features, each complex finds a specific location and task in the energy transport. One example is CP29, which occupies a pivotal position in Photosystem II, bridging the peripheral antennae to the core. The design principles behind this specificity, however, are still unclear. Here, a synergetic approach combining steady-state and ultrafast spectroscopy, mutational analysis and structure-based exciton modeling allows uncovering the energy landscape of the chlorophylls bound to this complex. We found that, although displaying an overall highly conserved exciton structure very similar to that of other LHCs, CP29 possesses an additional terminal emitter domain. The simultaneous presence of two low energy sites facing the peripheral antennae and the core, allows CP29 to efficiently work as a conduit in the energy flux. Our results show that the LHCs share a common solid architecture but have finely tuned their structure to carry out specific functions. |
| Databáze: | OpenAIRE |
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