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Architecture of the chloroplast PSI–NDH supercomplex in Hordeum vulgare

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  • Liangliang Shen

    (Chinese Academy of Sciences
    University of Chinese Academy of Science)

  • Kailu Tang

    (Zhejiang University School of Medicine)

  • Wenda Wang

    (Chinese Academy of Sciences)

  • Chen Wang

    (Zhejiang University School of Medicine)

  • Hangjun Wu

    (Zhejiang University School of Medicine)

  • Zhiyuan Mao

    (Chinese Academy of Sciences
    University of Chinese Academy of Science)

  • Shaoya An

    (Zhejiang University School of Medicine
    Zhejiang University School of Medicine)

  • Shenghai Chang

    (Zhejiang University School of Medicine)

  • Tingyun Kuang

    (Chinese Academy of Sciences)

  • Jian-Ren Shen

    (Chinese Academy of Sciences
    Okayama University)

  • Guangye Han

    (Chinese Academy of Sciences)

  • Xing Zhang

    (Zhejiang University School of Medicine
    Zhejiang University School of Medicine
    Zhejiang University Medical Center)

Abstract

The chloroplast NADH dehydrogenase-like (NDH) complex is composed of at least 29 subunits and has an important role in mediating photosystem I (PSI) cyclic electron transport (CET)1–3. The NDH complex associates with PSI to form the PSI–NDH supercomplex and fulfil its function. Here, we report cryo-electron microscopy structures of a PSI–NDH supercomplex from barley (Hordeum vulgare). The structures reveal that PSI–NDH is composed of two copies of the PSI–light-harvesting complex I (LHCI) subcomplex and one NDH complex. Two monomeric LHCI proteins, Lhca5 and Lhca6, mediate the binding of two PSI complexes to NDH. Ten plant chloroplast-specific NDH subunits are presented and their exact positions as well as their interactions with other subunits in NDH are elucidated. In all, this study provides a structural basis for further investigations on the functions and regulation of PSI–NDH-dependent CET.

Suggested Citation

  • Liangliang Shen & Kailu Tang & Wenda Wang & Chen Wang & Hangjun Wu & Zhiyuan Mao & Shaoya An & Shenghai Chang & Tingyun Kuang & Jian-Ren Shen & Guangye Han & Xing Zhang, 2022. "Architecture of the chloroplast PSI–NDH supercomplex in Hordeum vulgare," Nature, Nature, vol. 601(7894), pages 649-654, January.
    • Handle: RePEc:nat:nature:v:601:y:2022:i:7894:d:10.1038_s41586-021-04277-6
    DOI: 10.1038/s41586-021-04277-6
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