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Related Concept Videos

Synaptic Signaling01:12

Synaptic Signaling

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Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
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Assembly of Signaling Complexes01:30

Assembly of Signaling Complexes

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Multiprotein signaling complexes are formed in a dynamic process involving protein-protein interactions at the cytoplasmic domain of transmembrane receptors or enzymatic and non-enzymatic proteins associated with the receptor. These complexes ensure the activation and propagation of intracellular signals that regulate cell functions.
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
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Types of Signaling Molecules01:32

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In multicellular organisms, many molecules transmit signals between cells to pass information. These signals vary in complexity and include small peptides, nucleotides, steroids, fatty acid derivatives, and dissolved gases such as nitric oxide. Some signaling molecules diffuse through the plasma membrane to act locally between neighboring cells or travel long distances. Others remain attached to the cell surface, transmitting information to other cells only when they make contact. In some...
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Overview of Cell Signaling01:23

Overview of Cell Signaling

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Despite the protective membrane that separates a cell from the environment, cells need the ability to detect and respond to environmental changes. Additionally, cells often need to communicate with one another. Unicellular and multicellular organisms use a variety of cell signaling mechanisms to communicate with the environment.
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Signal Transduction: Overview01:26

Signal Transduction: Overview

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Cells respond to many types of information, often through receptor proteins positioned on the membrane. They respond to chemical signals, such as hormones, neurotransmitters, and other signaling molecules, initiating a series of molecular reactions to produce an appropriate response. This is called signal transduction. Cells also coordinate different responses elicited by the same signaling molecule via mediators, allowing molecular cross-talk.
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Contact-dependent Signaling01:19

Contact-dependent Signaling

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Contact-dependent signaling, as the name suggests, requires that communicating cells be in direct contact with each other. This is achieved either through receptor-ligand interactions or by specialized cytoplasmic channels that allow the flow of small molecules between cells. In animal cells, channels called gap junctions facilitate contact-dependent signaling in certain tissues, whereas, plasmodesmata perform a similar function in plants.
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Related Experiment Video

Updated: Jul 13, 2025

Presynapse Formation Assay Using Presynapse Organizer Beads and “Neuron Ball” Culture
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Presynapse Formation Assay Using Presynapse Organizer Beads and “Neuron Ball” Culture

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A signaling lipid drives synapse formation.

Pilar Rivero-Ríos1, Lois S Weisman1

  • 1Life Sciences Institute, University of Michigan-Ann Arbor, Ann Arbor, MI, USA.

Science (New York, N.Y.)
|October 12, 2023
PubMed
Summary

Phosphatidylinositol 3,5-bisphosphate is crucial for transporting proteins to synaptic sites. This lipid signaling molecule ensures proper protein delivery for neuronal function.

Area of Science:

  • Neuroscience
  • Cell Biology
  • Molecular Biology

Background:

  • Synaptic function relies on the precise delivery of proteins to neuronal synapses.
  • Lipid signaling molecules play critical roles in intracellular transport and protein trafficking.
  • The specific role of phosphatidylinositol 3,5-bisphosphate in synaptic protein transport remains incompletely understood.

Purpose of the Study:

  • To investigate the role of phosphatidylinositol 3,5-bisphosphate in the transport of proteins to synaptic sites.
  • To elucidate the molecular mechanisms by which phosphatidylinositol 3,5-bisphosphate regulates synaptic protein localization.

Main Methods:

  • Utilized advanced microscopy techniques to visualize protein transport in neurons.
  • Employed biochemical assays to analyze the levels and localization of phosphatidylinositol 3,5-bisphosphate.

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Related Experiment Videos

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  • Investigated the effects of manipulating phosphatidylinositol 3,5-bisphosphate levels on synaptic protein content.

    • Main Results:

    • Phosphatidylinositol 3,5-bisphosphate was found to be essential for the efficient transport of key synaptic proteins.
    • Disruption of phosphatidylinositol 3,5-bisphosphate signaling led to impaired protein delivery and altered synaptic structure.
    • Specific protein cargos were identified that are directly regulated by phosphatidylinositol 3,5-bisphosphate-mediated transport.

    Conclusions:

    • Phosphatidylinositol 3,5-bisphosphate is a critical regulator of synaptic protein transport.
    • This finding highlights the importance of lipid signaling in maintaining synaptic integrity and function.
    • Targeting phosphatidylinositol 3,5-bisphosphate pathways may offer therapeutic strategies for neurological disorders.