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CACNA1B

Voltage-sensitive calcium channels (VSCC) mediate the entry of calcium ions into excitable cells and are also involved in a variety of calcium-dependent processes, including muscle contraction, hormone or neurotransmitter release, gene expression, cell motility, cell division and cell death. The isoform alpha-1B gives rise to N-type calcium currents. N-type calcium channels belong to the high-voltage activated (HVA) group and are blocked by omega-conotoxin-GVIA (omega-CTx-GVIA) and by omega-agatoxin-IIIA (omega-Aga-IIIA). They are however insensitive to dihydropyridines (DHP), and omega-agatoxin-IVA (omega-Aga-IVA). Calcium channels containing alpha-1B subunit may play a role in directed migration of immature neurons
Protein class

Disease related genes, FDA approved drug targets, Human disease related genes, Plasma proteins, Voltage-gated ion channels

Predicted location

Membrane

Single cell type specificity

Group enriched (Excitatory neurons, Inhibitory neurons)

Immune cell specificity

Not detected in immune cells

Cell line specificity

Cell line enriched (SCLC-21H)

Interaction

Multisubunit complex consisting of alpha-1, alpha-2, beta and delta subunits in a 1:1:1:1 ratio. The channel activity is directed by the pore-forming and voltage-sensitive alpha-1 subunit. In many cases, this subunit is sufficient to generate voltage-sensitive calcium channel activity. The auxiliary subunits beta and alpha-2/delta linked by a disulfide bridge regulate the channel activity. Interacts with RIMS1. Interacts with FMR1 (via C-terminus); this interaction induces a decrease in the number of presynaptic functional CACNA1B channels at the cell surface.

Molecular function

Calcium channel, Ion channel, Voltage-gated channel

More Types Infomation

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For Research Use Only. Not For Clinical Use.

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