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The primary cilium, made up of microtubules, acts as antennae on the cell surfaces for relaying external stimuli into the cells. These fine hair-like structures are present, generally one per cell. These are non-motile cilia in a 9+0 microtubules arrangement, where the central pair of microtubules are absent. The primary cilia arise from the basal body embedded in the cell membrane. Intraflagellar transport (IFT) carries requisite proteins from the cytoplasm to the cilium because the primary...
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The membrane domains concentrate specific lipids and proteins at one place within the membrane, which helps in cell signaling, adhesion, and other critical cellular processes. These domains can differ in size, composition, function, and lifespan.
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Related Experiment Video

Updated: Apr 26, 2026

Measurement of 3-Dimensional cAMP Distributions in Living Cells using 4-Dimensional x, y, z, and &lambda; Hyperspectral FRET Imaging and Analysis
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Adenylate cyclase-centred microdomains.

Dermot M F Cooper1, Valentina G Tabbasum1

  • 1*Department of Pharmacology, University of Cambridge, Cambridge CB2 1PD, U.K.

The Biochemical Journal
|August 8, 2014
PubMed
Summary

Adenylate cyclases (ACs) control cellular processes via cAMP. Their selectivity arises from distinct species, regulation, and organization into signaling microdomains, enabling precise control and new therapeutic strategies.

Area of Science:

  • Molecular Biology
  • Cellular Signaling
  • Biochemistry

Background:

  • Adenylate cyclases (ACs) produce cyclic AMP (cAMP), a crucial second messenger affecting numerous eukaryotic processes.
  • Despite limited downstream effectors (PKA, Epacs, CNG channels), cAMP achieves selectivity and fine control.
  • Specific AC isoforms are linked to vital physiological functions and diseases like diabetes and arrhythmias.

Purpose of the Study:

  • To review the multifaceted regulation of ACs and their role in signal discrimination.
  • To highlight how ACs organize signaling microdomains for localized cAMP and Ca2+ dynamics.
  • To explore ACs as signaling hubs beyond cAMP production, offering new therapeutic intervention strategies.

Main Methods:

  • Literature review summarizing recent advances in AC/cAMP signaling.

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  • Analysis of AC regulation, including species-specific expression and post-translational modifications.
  • Discussion of AC-mediated scaffolding, protein interactions, and cellular microdomain organization.

    • Main Results:

    • AC selectivity is achieved through distinct isoforms, complex regulation, and dynamic scaffolding.
    • ACs function as signaling centers within organized microdomains, integrating cAMP and Ca2+ signals.
    • AC assemblies are cell-specific, context-dependent, and dynamic, requiring targeted biosensors for study.

    Conclusions:

    • ACs are fundamental signaling hubs with properties extending beyond cAMP synthesis.
    • Understanding AC microdomain organization reveals sophisticated mechanisms for signal discrimination.
    • Targeted interventions in AC-mediated pathways offer improved specificity for therapeutic applications.