ArticlePhotosynthesis research2023
Isolation and characterization of trimeric and monomeric PSI cores from Acaryochloris marina MBIC11017.
Article in Photosynthesis research, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed, 10 citations in OpenAlex.
- Canthaxanthin substitution of β-carotene yields structurally stable yet spectrally robust photosystem I cores in Synechocystis sp. PCC 6803.Photosynthesis research · 2026Article
- Biochemical characterization of PSI-FCPI and FCP complexes from a haptophyte Pavlova (Pavlovophyceae).Photosynthesis research · 2025Article
- The structural basis for light harvesting in organisms producing phycobiliproteins.The Plant cell · 2024Review
- Presence of low-energy chlorophylls d in photosystem I trimer and monomer cores isolated from Acaryochloris sp. NBRC 102871.Photosynthesis research · 2024Article
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Authors and funding
7 authors at 3 institutions in 1 country.
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Abstract
Photosystem I (PSI) catalyzes light-induced electron-transfer reactions and has been observed to exhibit various oligomeric states and different energy levels of chlorophylls (Chls) in response to oligomerization. However, the biochemical and spectroscopic properties of a PSI monomer containing Chls d are not well understood. In this study, we successfully isolated and characterized PSI monomers from the cyanobacterium Acaryochloris marina MBIC11017, and compared their properties with those of the A. marina PSI trimer. The PSI trimers and monomers were prepared using trehalose density gradient centrifugation after anion-exchange and hydrophobic interaction chromatography. The polypeptide composition of the PSI monomer was found to be consistent with that of the PSI trimer. The absorption spectrum of the PSI monomer showed the Qy band of Chl d at 704 nm, which was blue-shifted from the peak at 707 nm observed in the PSI-trimer spectrum. The fluorescence-emission spectrum of the PSI monomer measured at 77 K exhibited a peak at 730 nm without a broad shoulder in the range of 745-780 nm, which was clearly observed in the PSI-trimer spectrum. These spectroscopic properties of the A. marina PSI trimer and monomer suggest different formations of low-energy Chls d between the two types of PSI cores. Based on these findings, we discuss the location of low-energy Chls d in A. marina PSIs.
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