Evidence map›Paper›PMID 41420767›Full record

ArticlePhotosynthesis research2025

Structural insights into a PSI-ACPI supercomplex from a cryptophyte alga Chroomonas placoidea.

Xingyue Li, Zhiyuan Mao, Zhenhua Li, Liangliang Shen, Xiaoyi Li, Yanyan Yang, Wenda Wang, Tingyun Kuang, Jian-Ren Shen, Guangye Han

Abstract read
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In one paragraph

Article in Photosynthesis research, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
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

1 citing paper in PubMed.

  1. Structural insight of a photosystem I-CpcL-phycobilisome supercomplex from a cyanobacteriumProceedings of the National Academy of Sciences of the United States of America · 2026
    Article
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.

Xingyue Li *State Key Laboratory of Forage Breeding-by-Design and Utilization, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
Zhiyuan Mao *State Key Laboratory of Forage Breeding-by-Design and Utilization, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
Zhenhua Li *State Key Laboratory of Forage Breeding-by-Design and Utilization, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
Liangliang ShenState Key Laboratory of Forage Breeding-by-Design and Utilization, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
Xiaoyi LiState Key Laboratory of Forage Breeding-by-Design and Utilization, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
Yanyan YangState Key Laboratory of Forage Breeding-by-Design and Utilization, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
Wenda WangState Key Laboratory of Forage Breeding-by-Design and Utilization, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
Tingyun KuangState Key Laboratory of Forage Breeding-by-Design and Utilization, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
Jian-Ren ShenState Key Laboratory of Forage Breeding-by-Design and Utilization, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China. shen@cc.okayama-u.ac.jp.
Guangye HanState Key Laboratory of Forage Breeding-by-Design and Utilization, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China. hanguangye@ibcas.ac.cn.

Funding

Academician Workstation of Agricultural High-tech Industrial Area of the Yellow River Delta, National Center of Technology Innovation for Comprehensive Utilization of Saline-Alkali Land 2022SZX12Ministry of Science and Technology of the People's Republic of China 2022YFC3401800
6 · The paper itself

Abstract

Cryptophyte algae are an important group of photosynthetic eukaryotes and originated evolutionarily from a secondary endosymbiosis with a red algal ancestor. Photosystem I (PSI) of cryptophyte algae binds alloxanthin-chlorophyll a/c-binding proteins (ACPs) equivalent to the light harvesting complexes (LHCs) of green algae and higher plants. Here, we report a high resolution (2.25 Å) structure of the PSI-ACPI supercomplex purified from the cryptophyte Chroomonas placoidea (C. placoidea) by cryo-electron microscopy. The PSI-ACPI supercomplex consists of a monomeric PSI core, 14 ACPI subunits and a Chl-binding subunit, CCPI-S. The 14 ACPI subunits are divided into two layers, with an inner layer including 11 ACPIs, and an outer layer consisting of 3 ACPIs. The CCPI-S mediates the connections and energy transfer between the outer and inner ACPI layers. Due to the current higher resolution, a unique PsaQ subunit bound at the lumenal side was identified in the PSI core. Two new pigment molecules Chl a856PsaA and Mon 627ACPI − 8 as well as 18 new lipids were identified, compared to the previously reported PSI-ACPI structure from the cryptophyte alga C. placoidea (Zhao et al. 2023). These lipids mediate the interactions of subunits and the assembly of PSI-ACPI. These results provide structural insights for the assembly of the PSI-ACPI complex and pathways of light-energy absorption and transfer in cryptophyte PSI-ACPI, as well as the possible adaptation mechanisms to fluctuating light conditions.

Indexed as

CryptophytaLight-Harvesting Protein ComplexesPhotosystem I Protein ComplexChlorophyllChlorophyll ACryoelectron MicroscopyChlorophyllChlorophyll ALight-Harvesting Protein ComplexesPhotosystem I Protein ComplexACPIChroomonas placoideaCryptophyte algaePhotosystem IPhotosystem II

Identifiers

PMID41420767

What OpenQuestion holds

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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.