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Related Concept Videos

Gap Junctions01:37

Gap Junctions

52.7K
Multicellular organisms employ a variety of ways for cells to communicate with each other. Gap junctions are specialized proteins that form pores between neighboring cells in animals, connecting the cytoplasm between the two, and allowing for the exchange of molecules and ions. They are found in a wide range of invertebrate and vertebrate species, mediate numerous functions including cell differentiation and development, and are associated with numerous human diseases, including cardiac and...
52.7K
Contact-dependent Signaling01:19

Contact-dependent Signaling

44.4K
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.
Gap Junctions
In animal cells, gap junctions are formed...
44.4K
Protein Networks02:26

Protein Networks

3.9K
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
3.9K
Overview of Cell-Cell Junctions01:14

Overview of Cell-Cell Junctions

25.0K
The complex three-dimensional arrangement of cells in any multicellular organism is defined and maintained by interactions of cells with each other and the extracellular matrix. Cell-cell junctions are specialized structures where the multi-protein complexes on one cell interact with the multi-protein complexes on another  cell. These cell junctions are classified  into three main types based on their function — occluding, anchoring, and gap junctions.
Occluding or Tight...
25.0K
Condensins02:15

Condensins

3.4K
Condensins are large protein complexes that use ATP to fuel the assembly of chromosomes during mitosis. They transform the tangled, shapeless mass of post-interphase DNA into individualized chromosomes by compacting, organizing, and segregating chromosomal DNA.
The plant and animal cells contain two types of condensin complexes—condensin I and condensin II. Both complexes have five subunits: two SMC (Structural Maintenance of Chromosomes) subunits, a kleisin subunit, and two HEAT-repeat...
3.4K
Cohesins02:20

Cohesins

4.4K
Cohesin protein complexes are a molecular glue that holds two sister chromatids together. They play an important role both in mitosis and meiosis. In mitosis, all cohesin complexes present on the chromosomes are removed before the start of the anaphase stage.
Cohesin complexes in Meiotic Division
Meiosis involves two distinct rounds of chromosomal segregation and cell divisions— Meiosis I followed by Meiosis II – producing four daughter cells. Meiosis I includes the separation of...
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Related Experiment Video

Updated: Jun 10, 2025

Mechanical Stimulation-induced Calcium Wave Propagation in Cell Monolayers: The Example of Bovine Corneal Endothelial Cells
10:46

Mechanical Stimulation-induced Calcium Wave Propagation in Cell Monolayers: The Example of Bovine Corneal Endothelial Cells

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Connecting the dots on connexin function.

Ben Short1

  • 1Science Writer, Rockefeller University Press, New York, NY, USA.

The Journal of General Physiology
|October 14, 2024
PubMed
Summary

Small changes in connexin26 and connexin30 proteins affect gap junction and hemichannel function. These findings highlight the sensitivity of these crucial cellular communication channels to structural alterations.

Area of Science:

  • Molecular Biology
  • Cellular Physiology
  • Biophysics

Background:

  • Connexins (Cx), specifically Cx26 and Cx30, form gap junctions and hemichannels essential for intercellular communication.
  • Dysfunctional connexin channels are implicated in various diseases, including hearing loss and skin disorders.

Purpose of the Study:

  • To investigate how minor alterations in the pore-lining region of connexin26 and connexin30 impact their channel function.
  • To elucidate the structure-function relationship of connexin channels.

Main Methods:

  • Utilized two complementary studies (Sanchez et al., Kraujaliene et al.) published in the Journal of General Physiology.
  • Employed molecular and functional assays to assess connexin channel activity.

Main Results:

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Analysis of Protein-protein Interactions and Co-localization Between Components of Gap, Tight, and Adherens Junctions in Murine Mammary Glands
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Analysis of Protein-protein Interactions and Co-localization Between Components of Gap, Tight, and Adherens Junctions in Murine Mammary Glands

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An Iodide-Yellow Fluorescent Protein-Gap Junction-Intercellular Communication Assay
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An Iodide-Yellow Fluorescent Protein-Gap Junction-Intercellular Communication Assay

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Related Experiment Videos

Last Updated: Jun 10, 2025

Mechanical Stimulation-induced Calcium Wave Propagation in Cell Monolayers: The Example of Bovine Corneal Endothelial Cells
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Mechanical Stimulation-induced Calcium Wave Propagation in Cell Monolayers: The Example of Bovine Corneal Endothelial Cells

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Analysis of Protein-protein Interactions and Co-localization Between Components of Gap, Tight, and Adherens Junctions in Murine Mammary Glands
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Analysis of Protein-protein Interactions and Co-localization Between Components of Gap, Tight, and Adherens Junctions in Murine Mammary Glands

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An Iodide-Yellow Fluorescent Protein-Gap Junction-Intercellular Communication Assay
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An Iodide-Yellow Fluorescent Protein-Gap Junction-Intercellular Communication Assay

Published on: February 1, 2019

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  • Demonstrated that subtle variations within the pore-lining region significantly modify both gap junction and hemichannel activity.
  • Identified specific structural determinants influencing channel gating and selectivity.

Conclusions:

  • Even small structural changes in the pore-lining region can profoundly alter connexin channel function.
  • Provides critical insights into the molecular mechanisms governing connexin channel operation and disease pathogenesis.