Trafficking mechanisms and regulation of TRPC channels
Lorena Brito de Souza1, Indu S Ambudkar1
1Secretory Physiology Section, Molecular Physiology and Therapeutics Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892, United States.
Abstract:
TRPC channels are Ca(2+)-permeable cation channels which are regulated downstream from receptor-coupled PIP2 hydrolysis. These channels contribute to a wide variety of cellular functions. Loss or gain of channel function has been associated with dysfunction and aberrant physiology. TRPC channel functions are influenced by their physical and functional interactions with numerous proteins that determine their regulation, scaffolding, trafficking, as well as their effects on the downstream cellular processes. Such interactions also compartmentalize the Ca(2+) signals arising from TRPC channels. A large number of studies demonstrate that trafficking is a critical mode by which plasma membrane localization and surface expression of TRPC channels are regulated. This review will provide an overview of intracellular trafficking pathways as well as discuss the current state of knowledge regarding the mechanisms and components involved in trafficking of the seven members of the TRPC family (TRPC1-TRPC7).
Insights
Transient Receptor Potential Canonical (TRPC) channels regulate cellular functions. This review details intracellular trafficking pathways and mechanisms governing TRPC1-TRPC7 channel surface expression and function.
Area of Science:
- Molecular biology
- Cellular physiology
- Ion channel research
Background:
- Transient Receptor Potential Canonical (TRPC) channels are Ca(2+)-permeable cation channels crucial for diverse cellular functions.
- Dysregulation of TRPC channel function is linked to various diseases.
- TRPC channel activity is modulated by protein interactions affecting their regulation, scaffolding, and trafficking.
Purpose of the Study:
- To provide an overview of intracellular trafficking pathways for TRPC channels.
- To discuss the mechanisms and components involved in the trafficking of TRPC1-TRPC7.
- To highlight the importance of trafficking in regulating TRPC channel plasma membrane localization and function.
Main Methods:
- Literature review of studies on TRPC channel trafficking.
- Analysis of protein interactions influencing TRPC channel regulation and localization.
- Examination of cellular mechanisms controlling TRPC channel surface expression.
Main Results:
- Intracellular trafficking is a key mechanism controlling TRPC channel plasma membrane localization.
- Numerous proteins interact with TRPC channels to regulate their trafficking and function.
- Specific pathways and components involved in TRPC1-TRPC7 trafficking are increasingly understood.
Conclusions:
- Understanding TRPC channel trafficking is essential for comprehending their role in cellular physiology and disease.
- Targeting TRPC channel trafficking may offer therapeutic strategies for associated disorders.
- Further research into the detailed mechanisms of TRPC channel trafficking will elucidate their complex regulation.
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