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Architecture of a Charge-Transfer State Regulating Light Harvesting in a Plant Antenna Protein
Abstract
Energy-dependent quenching of excess absorbed light energy (qE) is a vital mechanism for regulating photosynthetic light harvesting in higher plants. All of the physiological characteristics of qE have been positively correlated with charge transfer between coupled chlorophyll and zeaxanthin molecules in the light-harvesting antenna of photosystem II (PSII). We found evidence for charge-transfer quenching in all three of the individual minor antenna complexes of PSII (CP29, CP26, and CP24), and we conclude that charge-transfer quenching in CP29 involves a delocalized state of an excitonically coupled chlorophyll dimer. We propose that reversible conformational changes in CP29 can “tune” the electronic coupling between the chlorophylls in this dimer, thereby modulating the energy of the chlorophyll-zeaxanthin charge-transfer state and switching on and off the charge-transfer quenching during qE.
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Cited by
Improving photosynthetic efficiency for greater yield.
Zhu, X.-G., Long, S. P., & Ort, D. R. (2010) · Annual Review of Plant Biology · doi:10.1146/annurev-arplant-042809-112206 · Cited by 1,902
Lessons from nature about solar light harvesting
Scholes, G. D., Fleming, G. R., Olaya-Castro, A., & van Grondelle, R. (2011) · Nature Chemistry · doi:10.1038/nchem.1145 · Cited by 1,915
Self-citationThe role of the xanthophyll cycle and of lutein in photoprotection of photosystem II
Jahns, P., & Holzwarth, A. R. (2012) · Biochimica et Biophysica Acta (BBA) - Bioenergetics · doi:10.1016/j.bbabio.2011.04.012 · Cited by 1,084
Sensing and Responding to Excess Light
Li, Z., Wakao, S., Fischer, B. B., & Niyogi, K. K. (2009) · Annual Review of Plant Biology · doi:10.1146/annurev.arplant.58.032806.103844 · Cited by 992
Self-citationUltrafast transient absorption spectroscopy: principles and application to photosynthetic systems
Berera, R., van Grondelle, R., & Kennis, J. T. M. (2009) · Photosynthesis Research · doi:10.1007/s11120-009-9454-y · Cited by 894
Metadata
- Authors
- Ahn, T. K., Avenson, T. J., Ballottari, M., Cheng, Y.-C., Niyogi, K. K., Bassi, R., & Fleming, G. R.
- Venue
- Science
- Published
- 2008-05-09
- Volume
- 320
- Issue
- 5877
- Pages
- 794-797
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2023972714
- Cited by
- 524
- References
- 0
- FWCI
- 17.25
- Type
- journal article
- Language
- en
- Open access
- closed
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- Ahn, T. K., Avenson, T. J., Ballottari, M., Cheng, Y.-C., Niyogi, K. K., Bassi, R., & Fleming, G. R. (2008). Architecture of a Charge-Transfer State Regulating Light Harvesting in a Plant Antenna Protein. Science. https://doi.org/10.1126/science.1154800
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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