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Syncytial germline architecture is actively maintained by contraction of an internal actomyosin corset

Author

Listed:
  • Agarwal Priti

    (National University of Singapore)

  • Hui Ting Ong

    (National University of Singapore)

  • Yusuke Toyama

    (National University of Singapore
    National University of Singapore)

  • Anup Padmanabhan

    (National University of Singapore)

  • Sabyasachi Dasgupta

    (National University of Singapore
    University of Toronto)

  • Matej Krajnc

    (Princeton University
    Jožef Stefan Institute)

  • Ronen Zaidel-Bar

    (National University of Singapore
    Tel Aviv University)

Abstract

Syncytial architecture is an evolutionarily-conserved feature of the germline of many species and plays a crucial role in their fertility. However, the mechanism supporting syncytial organization is largely unknown. Here, we identify a corset-like actomyosin structure within the syncytial germline of Caenorhabditis elegans, surrounding the common rachis. Using laser microsurgery, we demonstrate that actomyosin contractility within this structure generates tension both in the plane of the rachis surface and perpendicular to it, opposing membrane tension. Genetic and pharmacological perturbations, as well as mathematical modeling, reveal a balance of forces within the gonad and show how changing the tension within the actomyosin corset impinges on syncytial germline structure, leading, in extreme cases, to sterility. Thus, our work highlights a unique tissue-level cytoskeletal structure, and explains the critical role of actomyosin contractility in the preservation of a functional germline.

Suggested Citation

  • Agarwal Priti & Hui Ting Ong & Yusuke Toyama & Anup Padmanabhan & Sabyasachi Dasgupta & Matej Krajnc & Ronen Zaidel-Bar, 2018. "Syncytial germline architecture is actively maintained by contraction of an internal actomyosin corset," Nature Communications, Nature, vol. 9(1), pages 1-15, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-07149-2
    DOI: 10.1038/s41467-018-07149-2
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    Cited by:

    1. Miho Matsuda & Jan Rozman & Sassan Ostvar & Karen E. Kasza & Sergei Y. Sokol, 2023. "Mechanical control of neural plate folding by apical domain alteration," Nature Communications, Nature, vol. 14(1), pages 1-14, December.

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