Related Experiment Video
Updated: May 31, 2026
09:20
Perturbing Endothelial Biomechanics via Connexin 43 Structural Disruption
Published on: October 4, 2019
Connexin43 phosphorylation and cytoprotection in the heart
Maya M Jeyaraman1, Wattamon Srisakuldee, Barbara E Nickel
1University of Manitoba, Canada.
Biochimica Et Biophysica Acta
|July 19, 2011
Summary
Connexin43 (Cx43) phosphorylation patterns are crucial for cardiac protection against injury. Enhanced Cx43 phosphorylation enhances cardioprotection, highlighting its role in cellular resistance and intercellular communication.
Area of Science:
- Cardiovascular Biology
- Cellular Signaling
- Molecular Cardiology
Background:
- Connexins, particularly connexin43 (Cx43), are vital for intercellular communication via gap junctions, enabling electrical and metabolic coupling.
- Beyond gap junctions, Cx43 regulates cell proliferation, migration, and cytoprotection.
- Cx43's C-terminal domain contains multiple phosphorylation sites influenced by various signaling pathways, leading to dynamic phosphorylation patterns.
Purpose of the Study:
- To review the emerging relationship between Cx43 phosphorylation and cardiac resistance to injury.
- To present an overview of Cx43's role in cardioprotection.
- To discuss recent findings on enhanced Cx43 phosphorylation in cardioprotection.
Main Methods:
- Literature review focusing on connexin43 and cardiac injury.
- Analysis of signaling pathways affecting Cx43 phosphorylation.
- Review of experimental data on Cx43 phosphorylation states and cardioprotective effects.
Main Results:
- Cx43 phosphorylation patterns are linked to cellular responses and environmental stimuli.
- An enhanced phosphorylation state of Cx43 has been associated with increased resistance to cardiac injury.
- Cx43 plays a significant role in mediating cardioprotection.
Conclusions:
- Cx43 phosphorylation is a key regulator of cardiac cell function and survival.
- Modulating Cx43 phosphorylation represents a potential therapeutic strategy for cardioprotection.
- Further research into Cx43 phosphorylation dynamics is warranted for understanding and treating heart disease.
Related Concept Videos
01:37Gap Junctions
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...
01:27Gap Junctions
The cytoplasm of adjacent animal cells can exchange small molecules, ions, and secondary messengers via the communication channels which form the gap junctions. These junctions comprise a few hundred to thousands of molecular channels, each made of two halves, called the connexon hemichannel. A connexon is a hexamer of six transmembrane connexin proteins, which assemble radially, thus forming a pore or channel in the center. One connexon hemichannel docks with a corresponding connexon on the...
02:04Covalently Linked Protein Regulators
Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.
These groups modify specific amino acids in a protein.
01:27Transducer Mechanism: Enzyme-Linked Receptors
Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
Major types that are helpful drug targets include:
Major types that are helpful drug targets include:
01:29Cardiomyopathy III: Hypertrophic Cardiomyopathy
Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...