Evidence map›Paper›PMID 33879791›Full record

ArticleNature communications2021

Structure of the far-red light utilizing photosystem I of Acaryochloris marina.

Tasuku Hamaguchi, Keisuke Kawakami, Kyoko Shinzawa-Itoh, Natsuko Inoue-Kashino, Shigeru Itoh, Kentaro Ifuku, Eiki Yamashita, Kou Maeda, Koji Yonekura, Yasuhiro Kashino

Open access · goldAbstract read
In one paragraph

Article in Nature communications, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed
5.0field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

33 citing papers in PubMed, 78 citations in OpenAlex.

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  4. Epimerization of chlorophyll a analogs: effects of the vinyl groups in the A-ring and B-ring of the chlorin macrocycle.Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors at 7 institutions in 2 countries.

Tasuku Hamaguchi *Biostructural Mechanism Laboratory, RIKEN SPring-8 Center, Sayo, Hyogo, Japan.ORCID 0000-0003-0876-7700
Keisuke Kawakami *Research Center for Artificial Photosynthesis (ReCAP), Osaka City University, Sumiyoshi-ku, Osaka, Japan. kawakami.k@spring8.or.jp.
Kyoko Shinzawa-Itoh *Graduate School of Life Science, University of Hyogo, Ako-gun, Hyogo, Japan.
Natsuko Inoue-KashinoGraduate School of Life Science, University of Hyogo, Ako-gun, Hyogo, Japan.ORCID 0000-0001-8282-5249
Shigeru ItohDepartment of Physics, Graduate School of Science, Nagoya University, Nagoya, Japan.ORCID 0000-0002-3065-5812
Kentaro IfukuDivision of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto, Japan.ORCID 0000-0003-0241-8008
Eiki YamashitaLaboratory of Supramolecular Crystallography, Institute for Protein Research, Osaka University, Suita, Osaka, Japan.ORCID 0000-0002-4278-0039
Kou MaedaGraduate School of Life Science, University of Hyogo, Ako-gun, Hyogo, Japan.
Koji YonekuraBiostructural Mechanism Laboratory, RIKEN SPring-8 Center, Sayo, Hyogo, Japan. yone@spring8.or.jp.ORCID 0000-0001-5520-4391
Yasuhiro KashinoGraduate School of Life Science, University of Hyogo, Ako-gun, Hyogo, Japan. kashino@sci.u-hyogo.ac.jp.ORCID 0000-0002-4278-9359
University of Hyogo · JPKyoto University · JPNagoya University · JPOsaka City University · JPSPring-8 · JPThe University of Osaka · JPTohoku University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Acaryochloris marina is one of the cyanobacterial species that can use far-red light to drive photochemical reactions for oxygenic photosynthesis. Here, we report the structure of A. marina photosystem I (PSI) reaction center, determined by cryo-electron microscopy at 2.58 Å resolution. The structure reveals an arrangement of electron carriers and light-harvesting pigments distinct from other type I reaction centers. The paired chlorophyll, or special pair (also referred to as P740 in this case), is a dimer of chlorophyll d and its epimer chlorophyll d'. The primary electron acceptor is pheophytin a, a metal-less chlorin. We show the architecture of this PSI reaction center is composed of 11 subunits and we identify key components that help explain how the low energy yield from far-red light is efficiently utilized for driving oxygenic photosynthesis.

Indexed as

Bacterial ProteinsChlorophyllCryoelectron MicroscopyCyanobacteriaElectron TransportLightModels, MolecularOxygenPhotosynthesisPhotosystem I Protein ComplexProtein Structure, QuaternaryProtein SubunitsStatic ElectricityBacterial ProteinsChlorophyllchlorophyll dOxygenPhotosystem I Protein ComplexProtein Subunits

Identifiers

PMID33879791
PMCPMC8058080
OpenAlexW3117490975

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.