ArticlePhotosynthesis research2013
Temporal and spectral characterization of the photosynthetic reaction center from Heliobacterium modesticaldum.
Article in Photosynthesis research, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed, 35 citations in OpenAlex.
- Excitonic Structure and Primary Charge Separation in Purple Bacterial and Heliobacterial Reaction Centers.Plants (Basel, Switzerland) · 2026Review
- Steady-state P800 oxidation kinetics indicate that heliobacterial phototrophy is light-limited.Photosynthesis research · 2025Article
- Deletion ofApplied and environmental microbiology · 2025Article
- Cyanobacteriochromes from Gloeobacterales Provide New Insight into the Diversification of Cyanobacterial Photoreceptors.Journal of molecular biology · 2024Article
- Electronic Structures of Radical-Pair-Forming Cofactors in a Heliobacterial Reaction Center.Molecules (Basel, Switzerland) · 2024Article
- Reinvestigation on primary processes of PSII-dimer from Thermosynechococcus vulcanus by femtosecond pump-probe spectroscopy.Photosynthesis research · 2024Article
- The PshX subunit of the photochemical reaction center from Heliobacterium modesticaldum acts as a low-energy antenna.Photosynthesis research · 2022Article
- Excitonic structure and charge separation in the heliobacterial reaction center probed by multispectral multidimensional spectroscopy.Nature communications · 2021Article
- Shedding Light on Primary Donors in Photosynthetic Reaction Centers.Frontiers in microbiology · 2021Review
- Why are photosynthetic reaction centres dimeric?Chemical science · 2019Article
- Evolution of photosynthetic reaction centers: insights from the structure of the heliobacterial reaction center.Photosynthesis research · 2018Article
- Light-driven quinone reduction in heliobacterial membranes.Photosynthesis research · 2018Article
- Purification and biochemical characterization of the ATP synthase from Heliobacterium modesticaldum.Protein expression and purification · 2015Article
- Modulation of the fluorescence yield in heliobacterial cells by induction of charge recombination in the photosynthetic reaction center.Photosynthesis research · 2014Article
Corrections and comments
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Authors and funding
7 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
A time-resolved spectroscopic study of the isolated photosynthetic reaction center (RC) from Heliobacterium modesticaldum reveals that thermal equilibration of light excitation among the antenna pigments followed by trapping of excitation and the formation of the charge-separated state P800 (+)A0 (-) occurs within ~25 ps. This time scale is similar to that reported for plant and cyanobacterial photosystem I (PS I) complexes. Subsequent electron transfer from the primary electron acceptor A0 occurs with a lifetime of ~600 ps, suggesting that the RC of H. modesticaldum is functionally similar to that of Heliobacillus mobilis and Heliobacterium chlorum. The (A0 (-) - A0) and (P800 (+) - P800) absorption difference spectra imply that an 8(1)-OH-Chl a F molecule serves as the primary electron acceptor and occupies the position analogous to ec3 (A0) in PS I, while a monomeric BChl g pigment occupies the position analogous to ec2 (accessory Chl). The presence of an intense photobleaching band at 790 nm in the (A0 (-) - A0) spectrum suggests that the excitonic coupling between the monomeric accessory BChl g and the 8(1)-OH-Chl a F in the heliobacterial RC is significantly stronger than the excitonic coupling between the equivalent pigments in PS I.
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