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The Energy Transfer Yield between Carotenoids and Chlorophylls in Peridinin Chlorophyll a Protein Is Robust against Mutations
- Source :
- International Journal of Molecular Sciences; Volume 23; Issue 9; Pages: 5067
- Publication Year :
- 2022
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2022.
-
Abstract
- The energy transfer (ET) from carotenoids (Cars) to chlorophylls (Chls) in photosynthetic complexes occurs with almost unitary efficiency thanks to the synergistic action of multiple finely tuned channels whose photophysics and dynamics are not fully elucidated yet. We investigated the energy flow from the Car peridinin (Per) to Chl a in the peridinin chlorophyll a protein (PCP) from marine algae Amphidinium carterae by using two-dimensional electronic spectroscopy (2DES) with a 10 fs temporal resolution. Recently debated hypotheses regarding the S2-to-S1 relaxation of the Car via a conical intersection and the involvement of possible intermediate states in the ET were examined. The comparison with an N89L mutant carrying the Per donor in a lower-polarity environment helped us unveil relevant details on the mechanisms through which excitation was transferred: the ET yield was conserved even when a mutation perturbed the optimization of the system thanks to the coexistence of multiple channels exploited during the process.
- Subjects :
- 2DES
Chlorophyll
energy transfer
photosynthesis
two-dimensional electronic spectroscopy
Chlorophyll A
Organic Chemistry
General Medicine
Carotenoids
carotenoid
Catalysis
Computer Science Applications
N89L
PCP
Inorganic Chemistry
light harvesting
peridinin
chlorophyll
Mutation
Energy Transfer
Dinoflagellida
Physical and Theoretical Chemistry
Molecular Biology
Spectroscopy
Subjects
Details
- Language :
- English
- ISSN :
- 14220067
- Database :
- OpenAIRE
- Journal :
- International Journal of Molecular Sciences; Volume 23; Issue 9; Pages: 5067
- Accession number :
- edsair.doi.dedup.....fc89885bbf07aabfad771d4390563c6f
- Full Text :
- https://doi.org/10.3390/ijms23095067