| Function | Regulatory subunit of the voltage-gated potassium (Kv) Shaker channels composed of pore-forming and potassium-conducting alpha subunits and of regulatory beta subunits. The beta-1/KCNAB1 cytoplasmic subunit mediates closure of delayed rectifier potassium channels by physically obstructing the pore via its N-terminal domain and increases the speed of channel closure for other family members. Promotes the inactivation of Kv1.1/KCNA1, Kv1.2/KCNA2, Kv1.4/KCNA4, Kv1.5/KCNA5 and Kv1.6/KCNA6 alpha subunit-containing channels. Displays nicotinamide adenine dinucleotide phosphate (NADPH)-dependent aldoketoreductase activity by catalyzing the NADPH-dependent reduction of a variety of endogenous aldehydes and ketones. The binding of NADPH is required for efficient down-regulation of potassium channel activity. Oxidation of the bound NADPH restrains N-terminal domain from blocking the channel, thereby decreasing N-type inactivation of potassium channel activity. Isoform KvB1.2: Isoform KvB1.2 shows no effect on KCNA1, KCNA2 or KCNB1. |
| Protein Name | Voltage-Gated Potassium Channel Subunit Beta-1K(+ Channel Subunit Beta-1Kv-Beta-1 |
| Database Links | Reactome: R-HSA-1296072 |
| Cellular Localisation | CytoplasmMembranePeripheral Membrane ProteinCytoplasmic SideCell MembraneRecruited To The Cytoplasmic Side Of The Cell Membrane Via Its Interaction With Pore-Forming Potassium Channel Alpha Subunits |
| Alternative Antibody Names | Anti-Voltage-Gated Potassium Channel Subunit Beta-1 antibodyAnti-K(+ Channel Subunit Beta-1 antibodyAnti-Kv-Beta-1 antibodyAnti-KCNAB1 antibodyAnti-KCNA1B antibody |
Information sourced from Uniprot.org
