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Structure and Function of Roundabout Receptors.

Francesco Bisiak1, Andrew A McCarthy2

  • 1European Molecular Biology Laboratory, Grenoble Outstation, 71 Avenue Des Martyrs, 38042, Grenoble, France. fbisiak@embl.fr.

Sub-Cellular Biochemistry
|January 16, 2020
PubMed
Summary
This summary is machine-generated.

Roundabout (Robo) receptors mediate neuronal network formation by interacting with Slit ligands. Structural studies reveal their auto-inhibited conformation and how Slit binding triggers signaling, crucial for development and disease.

Keywords:
Guidance cuesNeuronsReceptorsRoboSignallingSlit

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Structural Biology

Background:

  • Neuronal network formation depends on ligand-receptor interactions for guidance.
  • Roundabout (Robo) receptors are key transmembrane proteins interacting with Slit ligands.
  • The complex structure of Robo receptors has historically limited understanding of their function.

Purpose of the Study:

  • To review current knowledge on the Roundabout receptor family and Slit-Robo signaling.
  • To elucidate the structural basis of Robo receptor auto-inhibition and activation.
  • To highlight the role of Robo receptors in larger cell surface assemblies.

Main Methods:

  • Analysis of recent structural studies on Robo 1 and Robo 2 ectodomains.
  • Review of literature on Slit-Robo interactions and signaling pathways.
  • Discussion of oligomerization and receptor complex formation.

Main Results:

  • Robo receptors adopt an auto-inhibited conformation stabilized by oligomerization.
  • Slit-N binding induces conformational changes in Robo receptors, leading to signaling, likely via endocytosis.
  • Robo receptors function within larger, context-dependent cell surface assemblies.

Conclusions:

  • Structural insights advance understanding of Slit-mediated Robo signaling mechanisms.
  • Further studies on larger Robo receptor assemblies are needed to understand their roles in development and disease.
  • Slit-Robo signaling is critical for neurogenesis, angiogenesis, organ development, and cancer progression.