Acid Sensitive Ion Channel 2b (ASIC2B, MDEG2 Mammalian Degenerin2)

Tissue acidosis that occurs in ischemia, tissue damage or inflammation is accompanied by pain. Proton-gated cation channels are activated by low pH in nociceptive neurons. H+-gated channels are members of the NaC/DEG superfamily that include: (1) Amiloride-sensitive epithelial Na+ channels (a, b, g, and d-ENaC subunits); (2) A FMRFamide-gated channel (FaNaC); (3) mechanosensory channel proteins of nematode degenerins (DEG). NaC/DEG superfamily is characterized by intracellular N and C-termini, two transmembrane domains, and a large extracellular loop. All members of this family are selective for...