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Related Concept Videos

Assembly of Signaling Complexes01:30

Assembly of Signaling Complexes

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,...
Intracellular Signaling Cascades01:24

Intracellular Signaling Cascades

Once a ligand binds to a receptor, the signal is transmitted through the membrane and into the cytoplasm. The continuation of a signal in this manner is called signal transduction. Signal transduction only occurs with cell-surface receptors, which cannot interact with most components of the cell, such as DNA. Only internal receptors can interact directly with DNA in the nucleus to initiate protein synthesis. When a ligand binds to its receptor, conformational changes occur that affect the...
Intracellular Signaling Cascades01:24

Intracellular Signaling Cascades

Once a ligand binds to a receptor, the signal is transmitted through the membrane and into the cytoplasm. The continuation of a signal in this manner is called signal transduction. Signal transduction only occurs with cell-surface receptors, which cannot interact with most components of the cell, such as DNA. Only internal receptors can interact directly with DNA in the nucleus to initiate protein synthesis. When a ligand binds to its receptor, conformational changes occur that affect the...
Interactions Between Signaling Pathways01:19

Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Overview of Cell Signaling01:23

Overview of Cell Signaling

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.
Cells respond to many types of information, often through receptor proteins positioned on the membrane. For example, skin cells respond to and transmit touch...
What is Cell Signaling?02:03

What is Cell Signaling?

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 to respond to the environment.

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Related Experiment Video

Updated: Jun 16, 2026

Dissecting Multi-protein Signaling Complexes by Bimolecular Complementation Affinity Purification (BiCAP)
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Signalling complexes and clusters: functional advantages and methodological hurdles.

Marek Cebecauer1, Martin Spitaler, Arnauld Sergé

  • 1Section of Molecular Medicine, National Heart and Lung Institute, Imperial College London, London SW7 2AZ, UK. m.cebecauer@imperial.ac.uk

Journal of Cell Science
|February 5, 2010
PubMed
Summary
This summary is machine-generated.

Cellular signalling relies on protein complexes and clusters for efficient information transfer. This review explores how these molecular assemblies form and function, aided by advanced live-cell imaging techniques.

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Last Updated: Jun 16, 2026

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Area of Science:

  • Cellular Biology
  • Biochemistry
  • Biophysics

Background:

  • Cellular signalling pathways depend on the precise organization of signalling molecules.
  • Macromolecular complexes and clusters enhance signalling efficiency, fidelity, and robustness.
  • Understanding molecular organization is key to deciphering cellular information processing.

Purpose of the Study:

  • To review current knowledge on the assembly and function of signalling molecule complexes and clusters.
  • To discuss the physical properties that govern the behaviour of these molecular assemblies.
  • To highlight recent advancements in live-cell imaging and particle tracking for observing dynamic signalling processes.

Main Methods:

  • Literature review of current research on signalling complexes and clusters.
  • Discussion of physical principles governing molecular assembly and function.
  • Overview of live-cell imaging techniques and object tracking methodologies.

Main Results:

  • Signalling molecules form macromolecular complexes and clusters to optimize cellular communication.
  • The physical properties of these assemblies are crucial for transducing environmental signals into cellular responses.
  • Live-cell imaging and particle tracking offer powerful tools to study the dynamics of signalling complexes.

Conclusions:

  • The organization of signalling molecules into complexes and clusters is fundamental to cellular information processing.
  • Advanced imaging techniques are crucial for understanding the dynamic nature of these molecular assemblies.
  • Further research into signalling complex dynamics will illuminate cellular behaviour and disease mechanisms.