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Updated: Mar 17, 2026

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Signaling Receptors for TGF-β Family Members

Carl-Henrik Heldin1, Aristidis Moustakas2

  • 1Ludwig Institute for Cancer Research Ltd., Science for Life Laboratory, Uppsala University, SE-751 24 Uppsala, Sweden.

Cold Spring Harbor Perspectives in Biology
|August 3, 2016
PubMed

Insights

Transforming growth factor beta (TGF-β) signaling relies on receptor complexes regulated by modifications and protein interactions. This process activates Smad and non-Smad pathways, influencing gene transcription and cellular functions.

Area of Science:

  • Molecular Biology
  • Cell Signaling
  • Biochemistry

Background:

  • Transforming growth factor beta (TGF-β) superfamily members are crucial regulators of cellular processes.
  • TGF-β signaling is mediated by heterotetrameric complexes of type I and type II serine/threonine kinase receptors.
  • Receptor activation and stability depend on posttranslational modifications and protein interactions.

Purpose of the Study:

  • To elucidate the molecular mechanisms governing TGF-β receptor activation and downstream signaling.
  • To highlight the role of posttranslational modifications in TGF-β receptor regulation.
  • To provide a comprehensive overview of both Smad-dependent and non-Smad signaling pathways activated by TGF-β receptors.

Main Methods:

  • Review of existing literature on TGF-β receptor signaling.
  • Analysis of posttranslational modifications affecting receptor function.
  • Identification of key components in Smad and non-Smad signaling cascades.

Main Results:

  • TGF-β receptor activity is modulated by phosphorylation, ubiquitylation, sumoylation, and neddylation.
  • Interactions with cell surface and cytoplasmic proteins are critical for receptor stability and signaling.
  • Activated TGF-β receptors initiate signaling through Smad complexes and non-Smad pathways.

Conclusions:

  • TGF-β receptor signaling is a complex process involving intricate regulatory mechanisms.
  • Both Smad and non-Smad pathways are essential for transducing TGF-β signals to the nucleus and cytoplasm.
  • Understanding these pathways is vital for deciphering TGF-β's role in development and disease.

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