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Voltage-gated sodium channels (NaV) are essential for the generation of action potentials and for cell excitability. NaV channels are activated in response to depolarization and selectively allow flow of Na+ ions. To date, nine NaV alpha subunits have been cloned and named NaV1.1-NaV1.9. The NaV channels are classified into two groups according to their sensitivity to tetrodotoxin (TTX): TTX-sensitive (NaV1.1, NaV1.2, NaV1.3, NaV1.4, NaV1.6 and NaV1.7) and TTX-resistant (NaV1.5, NaV1.8 and NaV1.9). Mammalian sodium channels are heterotrimers, composed of a central, pore-forming alpha subunit and two auxiliary beta subunits. The expression of the alpha subunit isoform is developmentally regulated and tissue specific. Sodium channels in the adult central nervous system and heart contain beta 1 through beta 4 subunits, whereas sodium channels in adult skeletal muscle have only the beta 1 subunit.
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Protein Aliases: 3-Feb; brain III voltage-gated sodium channel; cardiac tetrodotoxin-insensitive voltage-dependent sodium channel alpha subunit; CTC-264K15.6; HBSC II; hH1; hNa6/Scn8a voltage-gated sodium channel; hNaN; hNE-Na; Neuroendocrine sodium channel; Peripheral nerve sodium channel 3; Peripheral nerve sodium channel 5; Peripheral sodium channel 1; PN1; PN3; PN5; Sensory neuron sodium channel 2; skeletal muscle sodium channel alpha subunit; skeletal muscle voltage-dependent sodium channel type IV alpha subunit; SkM1; Sodium channel protein brain I subunit alpha; Sodium channel protein brain II subunit alpha; Sodium channel protein brain III subunit alpha; Sodium channel protein cardiac muscle subunit alpha; Sodium channel protein skeletal muscle subunit alpha; Sodium channel protein type 1 subunit alpha; Sodium channel protein type 10 subunit alpha; Sodium channel protein type 11 subunit alpha; Sodium channel protein type 2 subunit alpha; Sodium channel protein type 3 subunit alpha; Sodium channel protein type 4 subunit alpha; Sodium channel protein type 5 subunit alpha; Sodium channel protein type 8 subunit alpha; Sodium channel protein type 9 subunit alpha; Sodium channel protein type I subunit alpha; Sodium channel protein type II subunit alpha; Sodium channel protein type III subunit alpha; Sodium channel protein type IV subunit alpha; Sodium channel protein type IX subunit alpha; Sodium channel protein type V subunit alpha; Sodium channel protein type VIII subunit alpha; Sodium channel protein type X subunit alpha; Sodium channel protein type XI subunit alpha; sodium channel protein, brain I alpha subunit; sodium channel protein, brain type 2 alpha subunit; sodium channel voltage gated type 1 alpha subunit; sodium channel, voltage gated, type I alpha subunit; sodium channel, voltage gated, type II alpha subunit; sodium channel, voltage gated, type III alpha subunit; sodium channel, voltage gated, type IV alpha subunit; sodium channel, voltage gated, type IX alpha subunit; sodium channel, voltage gated, type V alpha subunit; sodium channel, voltage gated, type VIII alpha subunit; sodium channel, voltage gated, type VIII, alpha subunit; sodium channel, voltage gated, type X alpha subunit; sodium channel, voltage gated, type XI alpha subunit; sodium channel, voltage-gated, type I, alpha polypeptide; sodium channel, voltage-gated, type I, alpha subunit; sodium channel, voltage-gated, type II, alpha 1 polypeptide; sodium channel, voltage-gated, type II, alpha 2 polypeptide; sodium channel, voltage-gated, type II, alpha subunit; sodium channel, voltage-gated, type III, alpha polypeptide; sodium channel, voltage-gated, type IV, alpha subunit; sodium channel, voltage-gated, type IX, alpha polypeptide; sodium channel, voltage-gated, type IX, alpha subunit; sodium channel, voltage-gated, type V, alpha subunit; sodium channel, voltage-gated, type X, alpha polypeptide; sodium channel, voltage-gated, type X, alpha subunit; sodium channel, voltage-gated, type XI, alpha polypeptide; sodium channel, voltage-gated, type XI, alpha subunit; sodium channel, voltage-gated, type XII, alpha polypeptide; SP-19; voltage-gated sodium channel alpha subunit Nav1.7; voltage-gated sodium channel subtype II; Voltage-gated sodium channel subtype III; Voltage-gated sodium channel subunit alpha Nav1.1; Voltage-gated sodium channel subunit alpha Nav1.2; Voltage-gated sodium channel subunit alpha Nav1.3; Voltage-gated sodium channel subunit alpha Nav1.4; Voltage-gated sodium channel subunit alpha Nav1.5; Voltage-gated sodium channel subunit alpha Nav1.6; Voltage-gated sodium channel subunit alpha Nav1.7; Voltage-gated sodium channel subunit alpha Nav1.8; Voltage-gated sodium channel subunit alpha Nav1.9; voltage-gated sodium channel type II alpha subunit; voltage-gated sodium channel type VIII alpha protein
Gene Aliases: BFIC3; BFIS3; BFNIS; CDCD2; CERIII; CIAT; CMD1E; CMPD2; CMS16; EIEE11; EIEE13; EIEE6; ETHA; FEB3; FEB3A; FEB3B; FEPS2; FEPS3; FHM3; GEFSP2; GEFSP7; HB1; HB2; HBA; HBBD; HBSCI; HBSCII; HH1; HOKPP2; hPN3; HSAN2D; HSAN7; HYKPP; HYPP; ICCD; IVF; KIAA1356; LQT3; MED; Na(v)1.2; Na(V)1.4; NAC1; NAC1A; NAC2; NAC3; NaCh6; NaN; Nav1.1; Nav1.2; Nav1.3; Nav1.4; Nav1.5; Nav1.6; Nav1.7; Nav1.8; NAV1.9; NE-NA; NENA; PFHB1; PN1; PN3; PN4; PN5; SCN1; SCN10A; SCN11A; SCN12A; SCN1A; SCN2A; SCN2A1; SCN2A2; SCN3A; SCN4A; SCN5A; SCN8A; SCN9A; SFNP; SkM1; SMEI; SNS; SNS-2; SNS2; SSS1; VF1
UniProt ID: (Human) Q9Y5Y9, (Human) Q9UI33, (Human) P35498, (Human) Q99250, (Human) Q9NY46, (Human) P35499, (Human) Q14524, (Human) Q9UQD0, (Human) Q15858
Entrez Gene ID: (Human) 6336, (Human) 11280, (Human) 6323, (Human) 6326, (Human) 6328, (Human) 6329, (Human) 6331, (Human) 6334, (Human) 6335
Molecular Function:
voltage-gated ion channel
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