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Related Experiment Video

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Detection of Signaling Effector-Complexes Downstream of BMP4 Using in situ PLA, a Proximity Ligation Assay
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Combinatorial Signal Perception in the BMP Pathway.

Yaron E Antebi1, James M Linton1, Heidi Klumpe2

  • 1Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125, USA.

Cell
|September 9, 2017
PubMed
Summary
This summary is machine-generated.

The bone morphogenetic protein (BMP) pathway uses ligand combinations for sophisticated signal processing. Cells can perform computations like ratio sensing and balance detection by altering receptor expression.

Keywords:
BMPSMADbone morphogenetic proteinmultiplicitypromiscuity receptor-ligand interactionssignal perceptionsignal processingsignaling pathways

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Area of Science:

  • Cellular signaling
  • Molecular biology
  • Biochemistry

Background:

  • Bone morphogenetic protein (BMP) signaling involves promiscuous interactions between multiple ligands and receptors.
  • The functional significance of these complex interactions for signal processing has been unclear, often attributed to redundancy or flexibility.

Purpose of the Study:

  • To elucidate the signal-processing capabilities of the BMP pathway arising from multi-ligand inputs.
  • To understand how competitive receptor-ligand interactions contribute to specific cellular computations.
  • To explore how cells can modulate these computations through alternative receptor expression.

Main Methods:

  • Analysis of competitive receptor-ligand interactions within the BMP pathway.
  • Modeling of signal processing computations based on relative ligand levels.
  • Investigation of cellular selection of computations via alternative receptor variant expression.

Main Results:

  • The BMP pathway performs specific computations on multi-ligand inputs, including ratiometric sensing, balance detection, and imbalance detection.
  • These computations are directly derived from competitive interactions between ligands and receptors.
  • Cells can dynamically select different computational strategies by expressing distinct receptor variants.

Conclusions:

  • Promiscuous receptor-ligand interactions in the BMP pathway have a direct role in signal processing, enabling quantitative cellular control.
  • The findings establish operational principles for controlling cellular responses using BMP ligands.
  • Similar signal-processing principles may be applicable to other promiscuous signaling pathways.