Phospho-TRPV1(Ser502) Antibody - #AF8520

Ligand-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. 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 accumbens by affecting AMPA receptors endocytosis.

Phosphorylation by PKA reverses capsaicin-induced dephosphorylation at multiple sites, probably including Ser-117 as a major phosphorylation site. Phosphorylation by CAMKII seems to regulate binding to vanilloids. Phosphorylated and modulated by PRKCE, PRKCM and probably PRKCZ. Dephosphorylation by calcineurin seems to lead to receptor desensitization and phosphorylation by CAMKII recovers activity.

Cell junction>Synapse>Postsynaptic cell membrane>Multi-pass membrane protein. Cell projection>Dendritic spine membrane>Multi-pass membrane protein. Cell membrane>Multi-pass membrane protein.
Note: Mostly, but not exclusively expressed in postsynaptic dendritic spines.

Widely expressed at low levels. Expression is elevated in dorsal root ganglia. In skin, expressed in cutaneous sensory nerve fibers, mast cells, epidermal keratinocytes, dermal blood vessels, the inner root sheet and the infundibulum of hair follicles, differentiated sebocytes, sweat gland ducts, and the secretory portion of eccrine sweat glands (at protein level).

Interacts with PIRT (By similarity). Homotetramer (By similarity). Interacts with TRPV3 and may also form a heteromeric channel with TRPV3. Interacts with CALM, PRKCM and CSK. Interacts with PRKCG and NTRK1, probably by forming a trimeric complex (By similarity). Interacts with the Scolopendra mutilans RhTx toxin (By similarity). Interacts with TMEM100 (By similarity). Interacts with PACS2.

The association domain (AD) is necessary for self-association.

Belongs to the transient receptor (TC 1.A.4) family. TrpV subfamily. TRPV1 sub-subfamily.