Canonical transient receptor potential channel 3 (TRPC3)

Canonical transient receptor potential channel 3 (TRPC3) is a member of the canonical TRP subfamily of ion channels, notable for forming calcium-permeable, nonselective cation channels within the plasma membrane of diverse cells, including neurons, cardiomyocytes, and immune cells[1][2][4][5]. TRPC3 plays a crucial role in mediating store-operated calcium entry (SOCE) and contributes to cellular calcium homeostasis, which is vital for many physiological processes such as neurotransmitter release, muscle contraction, hormone secretion, and immune cell activation[1][2][4]. The channel can be activated by second messengers like diacylglycerol (DAG), and is functionally regulated via interactions with calmodulin, the IP3 receptor, and intracellular calcium levels[2]. Dysfunction or dysregulation of TRPC3 has been implicated in a range of disorders, including neurodegenerative diseases, cardiac hypertrophy, hypertension, and abnormalities in immune cell signaling[1][2][4]. Pharmacological modulation of TRPC3, for example by agonists like GSK-1702934A, is a focus of research for therapeutic intervention, although no approved drugs are currently available[2]. The channel's structure includes features characteristic of TRP channels (e.g., ankyrin repeats, transmembrane helices, TRP helix), and recent structural insights suggest unique gating and lipid-sensing mechanisms distinguishing it from other family members[1][2].

Other names

Transient receptor potential cation channel subfamily C member 3TRPC3Canonical TRP channel 3Transient receptor potential channel C3

Modulation of channel gating (by direct binding or allosteric mechanisms); Allosteric modulation through cytosolic protein interactions (e.g., calmodulin/IP3 receptor); Lipid (diacylglycerol)-induced channel activation