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Related Experiment Video

Updated: Jul 7, 2026

Use of Label-free Optical Biosensors to Detect Modulation of Potassium Channels by G-protein Coupled Receptors

Use of Label-free Optical Biosensors to Detect Modulation of Potassium Channels by G-protein Coupled Receptors

Published on: February 10, 2014

Slits and their receptors.

Alain Chédotal¹

¹CNRS UMR 7102, Université Paris 6, Paris, France. chedotal@infobiogen.fr

Advances in Experimental Medicine and Biology

|February 14, 2008

Summary

Slit proteins, crucial for neural development, are cleaved into fragments with distinct functions. These fragments, particularly leucine-rich repeats (LRRs), mediate repulsive activities in neurons.

Area of Science:

Molecular Biology
Developmental Biology
Neuroscience

Background:

Slit proteins are conserved secreted glycoproteins involved in embryonic patterning and neural development across species.
Mammals possess three Slit genes (Slit1-3), encoding large ECM glycoproteins with conserved structural domains like leucine-rich repeats (LRRs) and EGF repeats.
Alternative splicing and proteolytic cleavage generate various Slit isoforms and fragments with potentially different biological activities.

Purpose of the Study:

To investigate the structure-function relationships of Slit proteins and their fragments.
To elucidate the roles of different Slit domains, particularly LRRs, in mediating neuronal guidance and other developmental processes.
To understand the functional divergence between full-length Slit proteins and their cleaved fragments.

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Last Updated: Jul 7, 2026

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Published on: February 10, 2014

Detection of Ligand-activated G Protein-coupled Receptor Internalization by Confocal Microscopy

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Published on: April 9, 2017

Stripe Assay to Study the Attractive or Repulsive Activity of a Protein Substrate Using Dissociated Hippocampal Neurons

Stripe Assay to Study the Attractive or Repulsive Activity of a Protein Substrate Using Dissociated Hippocampal Neurons

Published on: June 19, 2016

Main Methods:

Comparative analysis of Slit gene and protein structures across different species.
Investigation of alternative splicing events and proteolytic processing of Slit proteins.
In vitro assays, including DRG branching and OB growth cone collapse assays, to assess the functional activities of Slit variants and fragments.
Structure-function analysis focusing on the LRR domains of Slit proteins.

Main Results:

Slit proteins are proteolytically cleaved into N-terminal and C-terminal fragments, with conserved cleavage mechanisms across species.
Slit fragments exhibit differential cell association, suggesting distinct diffusion and binding properties.
Full-length Slit2 antagonizes Slit2-N activity, and Slit2-N, not full-length Slit2, collapses OB growth cones.
The LRRs of Slit proteins are essential and sufficient for mediating repulsive activities on neurons.
A specific LRR domain (LRR2) is identified as a key site for Slit's pro-angiogenic activity, and dimerization through LRR4 and the cystein knot is possible, though not essential for OB axon repulsion.

Conclusions:

Slit protein processing and resulting fragments play critical roles in regulating neuronal development and guidance.
The LRR domains are crucial for Slit-mediated repulsion, with specific domains having distinct functions.
Functional divergence between Slit isoforms and fragments contributes to the complexity of developmental signaling pathways.