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|calcium channel, voltage-dependent, N type, alpha 1B subunit|
The N-type calcium channel is a type of voltage-dependent calcium channel. Like the others of this class, the α1 subunit is the one that determines most of the channel's properties.
N-type ('N' for neuron) calcium channels are found primarily at presynaptic terminals and are involved in neurotransmitter release. Strong depolarization by an action potential causes these channels to open and allow influx of Ca2+, initiating vesicle fusion and release of stored neurotransmitter. N-type channels are blocked by ω-conotoxin.
The analgesic drug ziconotide inhibits N-type channels.
Membrane transport protein: ion channels
|Ca||Voltage-dependent calcium channel (L-type/CACNA1C, N-type, P-type, Q-type, R-type, T-type) - Inositol triphosphate receptor - Ryanodine receptor - Cation channels of sperm|
|Na: Sodium channel||Nav1.4 - Nav1.5 - Nav1.7 - Epithelial sodium channel|
|K: Potassium channel||Voltage-gated (KvLQT1, KvLQT2, KvLQT3, HERG, Shaker gene, KCNE1) - Calcium-activated (BK channel, SK channel) - Inward-rectifier (ROMK, KCNJ2) - Tandem pore domain|
|Cl: Chloride channel||Cystic fibrosis transmembrane conductance regulator|
|Porin||Aquaporin (1, 2, 3, 4)|
|Transient receptor potential||TRPA - TRPC (TRPC6) - TRPM (TRPM6) - TRPML (Mucolipin-1) - TRPP - TRPV (TRPV1, TRPV6)|
|Other/general||Gap junction - Stretch-activated ion channel - Ligand-gated ion channel - Voltage-gated ion channel - Cyclic nucleotide-gated ion channel - Two-pore channel|
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