Phosphorylation of light-harvesting complex II controls excitation energy spillover between photosystems
Tokutsu, R.; Kim, E.; Akimoto, S.; Yokono, M.; Fujimura-Kamada, K.; Ohnishi, N.; Ueno, Y.; Minagawa, J.
Show abstract
Land plants and microalgae convert solar energy into electrochemical energy by using cooperative two photosystems (PSI and PSII). To maintain optimal photosynthetic rates under variable light conditions in nature, phosphorylation of light-harvesting complex for PSII (LHCII) balances the excitation energy distribution between the two photosystems. Here, we investigated the mechanism of this balancing in a green alga. We show that phospho-LHCIIs physically bind to both photosystems. The energy transfer from the LHCIIs to the PSII core complexes becomes less efficient, whereas the excitation level of PSI increases. The time-resolved fluorescence spectra showed an increase in delayed PSI fluorescence, which represents energetical spillover from PSII to PSI. In addition, the spillover is likely mediated by phospho-LHCIIs and PSI antennas. We hypothesize that the spillover explains the larger extent of phospho-LHCIIs dependent energy balancing in the green alga than land plants, which is important for the short-term photoadaptaion in the algal habitat.
Matching journals
The top 4 journals account for 50% of the predicted probability mass.
Similar papers in this journal
- Photoreceptor-induced LHL4 protects photosystem II in Chlamydomonas reinhardtii 96%
- Discovery of a novel small protein factor involved in the coordinated degradation of phycobilisomes in cyanobacteria 95%
- Modulation of xanthophyll cycle impacts biomass productivity in the marine microalga Nannochloropsis 95%
Similar papers in this journal
Similar papers in this journal
- Impact of energy limitations on function and resilience in long-wavelength Photosystem II 98%
- Structural basis for the absence of low-energy chlorophylls responsible for photoprotection from a primitive cyanobacterial PSI 96%
- Pyruvate:ferredoxin oxidoreductase and low abundant ferredoxins support aerobic photomixotrophic growth in cyanobacteria 95%
Similar papers in this journal
- Conformational dynamics of photosynthetic Light-Harvesting Complex II in a native membrane environment 92%
- Oligomerization processes limit photoactivation and recovery of the Orange Carotenoid Protein. 92%
- Early detection of daylengths with a feedforward circuit coregulated by circadian and diurnal cycles 91%
Similar papers in this journal
- Mechanism of nucleus-chloroplast communication by alternative promoter usage and stromules to establish photomorphogenesis in Arabidopsis 93%
- Trimeric Photosystem I facilitates energy transfer from phycobilisomes in Synechocystis sp. PCC 6803 93%
- The PELOTA-HBS1 Complex Orchestrates mRNA Translation Surveillance and PDK1-mediated Plant Growth and Development 93%
"Similar papers" are the closest papers from that journal in the model's embedding space. They show what the match is built on, but the ranking comes mostly from a classifier over the whole training set, not from these examples alone.