Receptor-activated non-selective calcium permeant cation channel involved in detection of noxious chemical and thermal stimuli. Seems to mediate proton influx and may be involved in intracellular acidosis in nociceptive neurons. May be involved in mediation of inflammatory pain and hyperalgesia. Sensitized by a phosphatidylinositol second messenger system activated by receptor tyrosine kinases, which involves PKC isozymes and PCL. Activation by vanilloids, like capsaicin, and temperatures higher than 42 degrees Celsius, exhibits a time- and Ca(2+)-dependent outward rectification, followed by a long-lasting refractory state. Mild extracellular acidic pH (6.5) potentiates channel activation by noxious heat and vanilloids, whereas acidic conditions (pH <6) directly activate the channel. Can be activated by endogenous compounds, including 12-hydroperoxytetraenoic acid and bradykinin. Acts as ionotropic endocannabinoid receptor with central neuromodulatory effects. Triggers a form of long-term depression (TRPV1-LTD) mediated by the endocannabinoid anandamine in the hippocampus and nucleus accubens by affecting AMPA receptors endocytosis.
Specificity
Natural and recombinant Rat Transient receptor potential cation channel subfamily V member 1
Subcellular Location
Cell junction synapse postsynaptic cell membrane Multi-pass membrane protein Cell projection dendritic spine membrane Multi-pass membrane protein Mostly, but not exclusively expressed in post-synaptic dendritic spines.
Interacts with PIRT (By similarity). Self-associates. Probably homotetramer. May also form a heteromeric channel with TRPV3. Interacts with calmodulin, PRKCM and CSK. Interacts with PRKCG and NTRK1, probably by forming a trimeric complex.