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When a ligand binds to a cell-surface receptor, the receptor's intracellular domain changes shape, which may either activate its enzyme function or allow its binding to other molecules. The initial signal is amplified by most signal transduction pathways. This means that a single ligand molecule can activate multiple molecules of a downstream target. Proteins that relay a signal are most commonly phosphorylated at one or more sites, activating or inactivating the protein. Kinases catalyze the...
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Related Experiment Video

Updated: Jun 2, 2026

Presynapse Formation Assay Using Presynapse Organizer Beads and “Neuron Ball” Culture
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Published on: August 2, 2019

Orchestrating the synaptic network by tyrosine phosphorylation signalling.

Ania Dabrowski1, Hisashi Umemori

  • 1Molecular & Behavioral Neuroscience Institute, Medical Scientist Training Program, Neuroscience Graduate Program and Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI 48109-2200, USA.

Journal of Biochemistry
|April 22, 2011
PubMed
Summary
This summary is machine-generated.

Synaptic organizers guide brain wiring by regulating protein tyrosine kinases (PTKs) and phosphatases (PTPs). These signaling pathways are crucial for precise synapse formation and brain circuitry development.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Cell Biology

Background:

  • Functional brain development relies on precise synapse formation between neurons.
  • Trans-synaptic molecular cues, or synaptic organizers, mediate this process.
  • The precise signaling mechanisms underlying synapse formation are under active investigation.

Purpose of the Study:

  • To elucidate the signaling mechanisms by which synaptic organizers establish functional synapses.
  • To highlight the role of receptor protein tyrosine kinases (RPTKs) and phosphatases (RPTPs) in synapse formation.
  • To understand how these signaling molecules contribute to the development of brain circuitry.

Main Methods:

  • Review of recent studies on synaptic organizers and their downstream signaling pathways.
  • Analysis of the roles of RPTKs and RPTPs in regulating protein-protein interactions, phosphorylation cascades, and gene expression.
  • Examination of the differential functions of various RPTKs and RPTPs in specific synaptic contexts.

Main Results:

  • Synaptic organizers can function through RPTKs and RPTPs to promote synapse formation.
  • RPTKs and RPTPs influence synapse development by modulating protein binding, signaling cascades, and gene expression.
  • Different RPTKs and RPTPs exhibit distinct roles and target specific synapses, contributing to network specificity.

Conclusions:

  • Tyrosine phosphorylation signaling, mediated by RPTKs and RPTPs, is essential for building complex brain circuitry.
  • Understanding these signaling pathways provides critical insights into neural development and synaptic organization.
  • Targeting these pathways may offer future therapeutic avenues for neurological disorders affecting brain wiring.