Structural insights into the assembly and energy transfer of the Lhcb9-dependent photosystem I from moss Physcomitrium patens

Sun, Hui; Shang, Hui; Pan, Xiaowei; Li, Mei

doi:10.1038/s41477-023-01463-4

Cited by 7 publications

(4 citation statements)

References 77 publications

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“…23h ). This pigment arrangement was presumed to play a role in quenching excess energy in addition to light harvesting 38 , 39 . Intriguingly, a similar pigment arrangement was identified in AcpPCI-1, whereas the carotenoid equivalent to L3 in Lhcb9 is absent in AcpPCI-3/4 (Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

Architecture of symbiotic dinoflagellate photosystem I–light-harvesting supercomplex in Symbiodinium

Zhao,

Wang,

et al. 2024

Nat Commun

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Symbiodinium are the photosynthetic endosymbionts for corals and play a vital role in supplying their coral hosts with photosynthetic products, forming the nutritional foundation for high-yield coral reef ecosystems. Here, we determine the cryo-electron microscopy structure of Symbiodinium photosystem I (PSI) supercomplex with a PSI core composed of 13 subunits including 2 previously unidentified subunits, PsaT and PsaU, as well as 13 peridinin-Chl a/c-binding light-harvesting antenna proteins (AcpPCIs). The PSI–AcpPCI supercomplex exhibits distinctive structural features compared to their red lineage counterparts, including extended termini of PsaD/E/I/J/L/M/R and AcpPCI-1/3/5/7/8/11 subunits, conformational changes in the surface loops of PsaA and PsaB subunits, facilitating the association between the PSI core and peripheral antennae. Structural analysis and computational calculation of excitation energy transfer rates unravel specific pigment networks in Symbiodinium PSI–AcpPCI for efficient excitation energy transfer. Overall, this study provides a structural basis for deciphering the mechanisms governing light harvesting and energy transfer in Symbiodinium PSI–AcpPCI supercomplexes adapted to their symbiotic ecosystem, as well as insights into the evolutionary diversity of PSI–LHCI among various photosynthetic organisms.

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Section: Resultsmentioning

confidence: 99%

Architecture of symbiotic dinoflagellate photosystem I–light-harvesting supercomplex in Symbiodinium

Zhao,

Wang,

et al. 2024

Nat Commun

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“…Although ancestral land plants contain several LHC homologs, further expansion occurred in P. patens after WGD events ( Alboresi et al 2008 ; Rensing et al 2008 ; Zimmer et al . 2013 ; Sun et al 2023 ). This led to a larger repertoire of LHC genes compared with the alga Chlamydomonas reinhardtii and the vascular plant Arabidopsis thaliana .…”

Section: Resultsmentioning

confidence: 99%

“…The major antenna proteins encoded by Lhcbm also show greater redundancy and diversity in P. patens ( Iwai et al . 2018 ; Sun et al . 2023 ).…”

Section: Resultsmentioning

confidence: 99%

Crossroads of assembling a moss genome: navigating contaminants and horizontal gene transfer in the moss Physcomitrellopsis africana

Vuruputoor,

Starovoitov,

Cai

et al. 2024

G3: Genes, Genomes, Genetics

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The first chromosome-scale reference genome of the rare narrow-endemic African moss Physcomitrellopsis africana is presented here. Assembled from 73x nanopore long reads and 163x BGI-seq short reads, the 414 Mb reference comprises 26 chromosomes and 22,925 protein-coding genes (BUSCO: C:94.8%[D:13.9%]). This genome holds two genes that withstood rigorous filtration of microbial contaminants, have no homolog in other land plants and are thus interpreted as resulting from two unique horizontal gene transfers from microbes. Further, Physcomitrellopsis africana shares 176 of the 273 published HGT candidates identified in Physcomitrium patens, but lacks 98 of these, highlighting that perhaps as many as 91 genes were acquired in P. patens in the last 40 million years following its divergence from its common ancestor with P. africana. These observations suggest rather continuous gene gains via HGT followed by potential losses, during the diversification of the Funariaceae. Our findings showcase both dynamic flux in plant HGTs over evolutionarily “short” timescales, alongside enduring impacts of successful integrations, like those still functionally maintained in extant Physcomitrellopsis africana. Furthermore, this study describes the informatic processes employed to distinguish contaminants from candidate HGT events.

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“…除了高等植物和绿藻外,研究人员发现在小立碗藓(Physcomitrium patens)中 Lhcb9 在外周捕光天线向 PSI 核心的激发能量传递方面起着至关重要的作用 [90] . 近期通过单颗粒冷冻电镜技术解析的小立碗藓 PSI-LHCI-LHCII-Lhcb9 超大复合物结构 [90,91] ,…”

Section: 植物和绿藻 Psi-lhci-lhcii 超级复合物unclassified

Structures, arrangements and functions of LHC antennas for oxygenic photosynthetic organisms

SHEN,

WANG,

WANG

2024

Sci. Sin.-Vitae

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Structural insights into the assembly and energy transfer of the Lhcb9-dependent photosystem I from moss Physcomitrium patens

Cited by 7 publications

References 77 publications

Architecture of symbiotic dinoflagellate photosystem I–light-harvesting supercomplex in Symbiodinium

Architecture of symbiotic dinoflagellate photosystem I–light-harvesting supercomplex in Symbiodinium

Crossroads of assembling a moss genome: navigating contaminants and horizontal gene transfer in the moss Physcomitrellopsis africana

Structures, arrangements and functions of LHC antennas for oxygenic photosynthetic organisms

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