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R-spondins are BMP receptor antagonists in Xenopus early embryonic development

Author

Listed:
  • Hyeyoon Lee

    (DKFZ-ZMBH Alliance, Deutsches Krebsforschungszentrum (DKFZ))

  • Carina Seidl

    (DKFZ-ZMBH Alliance, Deutsches Krebsforschungszentrum (DKFZ))

  • Rui Sun

    (DKFZ-ZMBH Alliance, Deutsches Krebsforschungszentrum (DKFZ))

  • Andrey Glinka

    (DKFZ-ZMBH Alliance, Deutsches Krebsforschungszentrum (DKFZ))

  • Christof Niehrs

    (DKFZ-ZMBH Alliance, Deutsches Krebsforschungszentrum (DKFZ)
    Institute of Molecular Biology (IMB))

Abstract

BMP signaling plays key roles in development, stem cells, adult tissue homeostasis, and disease. How BMP receptors are extracellularly modulated and in which physiological context, is therefore of prime importance. R-spondins (RSPOs) are a small family of secreted proteins that co-activate WNT signaling and function as potent stem cell effectors and oncogenes. Evidence is mounting that RSPOs act WNT-independently but how and in which physiological processes remains enigmatic. Here we show that RSPO2 and RSPO3 also act as BMP antagonists. RSPO2 is a high affinity ligand for the type I BMP receptor BMPR1A/ALK3, and it engages ZNRF3 to trigger internalization and degradation of BMPR1A. In early Xenopus embryos, Rspo2 is a negative feedback inhibitor in the BMP4 synexpression group and regulates dorsoventral axis formation. We conclude that R-spondins are bifunctional ligands, which activate WNT- and inhibit BMP signaling via ZNRF3, with implications for development and cancer.

Suggested Citation

  • Hyeyoon Lee & Carina Seidl & Rui Sun & Andrey Glinka & Christof Niehrs, 2020. "R-spondins are BMP receptor antagonists in Xenopus early embryonic development," Nature Communications, Nature, vol. 11(1), pages 1-16, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-19373-w
    DOI: 10.1038/s41467-020-19373-w
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    Cited by:

    1. Hyeyoon Lee & Celine Marie Camuto & Christof Niehrs, 2024. "R-Spondin 2 governs Xenopus left-right body axis formation by establishing an FGF signaling gradient," Nature Communications, Nature, vol. 15(1), pages 1-18, December.

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