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Related Concept Videos

Calmodulin-dependent Signaling01:16

Calmodulin-dependent Signaling

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Calmodulin (CaM) is a calcium-binding protein in eukaryotes that controls various calcium-regulated cellular processes. It has four calcium-binding sites that bind calcium to form the calcium-calmodulin ( Ca2+-CaM) complex. GPCR stimulation increases the calcium levels in the cells that bind to CaM and induces a conformational change.
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Synaptic Signaling01:12

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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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Synaptic Signaling01:09

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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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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.
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Some GPCRs transmit signals through adenylyl cyclase (AC), a transmembrane enzyme. AC helps synthesize second messenger cyclic adenosine monophosphate (cAMP). AC catalyzes cyclization reaction and converts ATP to cAMP by releasing a pyrophosphate. The pyrophosphate is further hydrolyzed to phosphate by the enzyme pyrophosphatase, which drives cAMP synthesis to completion. However, cAMP is rapidly degraded to 5′ AMP by the enzymes phosphodiesterase (PDE), preventing overstimulation of...
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Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
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Related Experiment Video

Updated: Dec 20, 2025

Long-range Channelrhodopsin-assisted Circuit Mapping of Inferior Colliculus Neurons with Blue and Red-shifted Channelrhodopsins
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Coordinating Synaptic Signaling with CRMP2.

Harrison Stratton1, Lisa Boinon1, Aubin Moutal1

  • 1Department of Pharmacology, College of Medicine, University of Arizona, United States.

The International Journal of Biochemistry & Cell Biology
|May 22, 2020
PubMed
Summary
This summary is machine-generated.

Collapsin response mediator protein 2 (CRMP2) is crucial for synaptic transmission, influencing ion channels and calcium levels. Understanding CRMP2

Keywords:
CaV2.2Collapsin-response-mediator-protein 2NaV1.7Synaptic signaling

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Cell Biology

Background:

  • Synaptic transmission is vital for neurological function; its dysregulation is implicated in various neurological disorders.
  • Collapsin response mediator protein 2 (CRMP2) is a microtubule-associated protein found throughout the central nervous system.
  • CRMP2 was initially identified in growth cone collapse but is now known to be involved in ion channel trafficking, axonal transport, and calcium homeostasis.

Purpose of the Study:

  • To review the known synaptic interactions of CRMP2.
  • To illustrate CRMP2's role in synaptic transmission.
  • To introduce CRMP2 as a potential therapeutic target for neurological conditions characterized by aberrant synaptic activity.

Main Methods:

  • Literature review of studies on CRMP2 function.
  • Analysis of CRMP2 interactions with key synaptic proteins.
  • Examination of CRMP2's influence on ion channels and calcium signaling.

Main Results:

  • CRMP2 is present at both pre- and post-synaptic sites.
  • CRMP2 interacts with N-methyl-D-aspartate receptors, syntaxin1A, and voltage-gated ion channels.
  • These interactions suggest CRMP2's involvement in both electrical and chemical synaptic transmission.

Conclusions:

  • CRMP2 plays a significant role in regulating synaptic transmission.
  • CRMP2's involvement in ion channel and calcium homeostasis makes it a key player in synaptic function.
  • CRMP2 represents a promising therapeutic target for modulating aberrant synaptic activity in neurological diseases.