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Thylakoid protein FPB1 synergistically cooperates with PAM68 to promote CP47 biogenesis and Photosystem II assembly

Author

Listed:
  • Lin Zhang

    (Shanghai Normal University)

  • Junxiang Ruan

    (Shanghai Normal University)

  • Fudan Gao

    (Shanghai Normal University)

  • Qiang Xin

    (Shanghai Normal University)

  • Li-Ping Che

    (Shanghai Normal University)

  • Lujuan Cai

    (Shanghai Normal University)

  • Zekun Liu

    (Shanghai Normal University)

  • Mengmeng Kong

    (Chinese Academy of Science)

  • Jean-David Rochaix

    (University of Geneva)

  • Hualing Mi

    (Chinese Academy of Science)

  • Lianwei Peng

    (Shanghai Normal University)

Abstract

In chloroplasts, insertion of proteins with multiple transmembrane domains (TMDs) into thylakoid membranes usually occurs in a co-translational manner. Here, we have characterized a thylakoid protein designated FPB1 (Facilitator of PsbB biogenesis1) which together with a previously reported factor PAM68 (Photosynthesis Affected Mutant68) is involved in assisting the biogenesis of CP47, a subunit of the Photosystem II (PSII) core. Analysis by ribosome profiling reveals increased ribosome stalling when the last TMD segment of CP47 emerges from the ribosomal tunnel in fpb1 and pam68. FPB1 interacts with PAM68 and both proteins coimmunoprecipitate with SecY/E and Alb3 as well as with some ribosomal components. Thus, our data indicate that, in coordination with the SecY/E translocon and the Alb3 integrase, FPB1 synergistically cooperates with PAM68 to facilitate the co-translational integration of the last two CP47 TMDs and the large loop between them into thylakoids and the PSII core complex.

Suggested Citation

  • Lin Zhang & Junxiang Ruan & Fudan Gao & Qiang Xin & Li-Ping Che & Lujuan Cai & Zekun Liu & Mengmeng Kong & Jean-David Rochaix & Hualing Mi & Lianwei Peng, 2024. "Thylakoid protein FPB1 synergistically cooperates with PAM68 to promote CP47 biogenesis and Photosystem II assembly," Nature Communications, Nature, vol. 15(1), pages 1-17, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-46863-y
    DOI: 10.1038/s41467-024-46863-y
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    References listed on IDEAS

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    1. Yasufumi Umena & Keisuke Kawakami & Jian-Ren Shen & Nobuo Kamiya, 2011. "Crystal structure of oxygen-evolving photosystem II at a resolution of 1.9 Å," Nature, Nature, vol. 473(7345), pages 55-60, May.
    2. Ziyu Zhao & Irene Vercellino & Jana Knoppová & Roman Sobotka & James W. Murray & Peter J. Nixon & Leonid A. Sazanov & Josef Komenda, 2023. "The Ycf48 accessory factor occupies the site of the oxygen-evolving manganese cluster during photosystem II biogenesis," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
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