Anti-Kv1.4/KCNA4 Antibody Picoband® Fluoro488 Conjugated

Potassium voltage-gated channel subfamily A member 4, also known as Kv1.4 or PCN2, is a protein that in humans is encoded by the KCNA4 gene. This gene encodes a member of the potassium channel, voltage-gated, shaker-related subfamily. It is mapped to 11p14.1. KCNA4 belongs to the A-type potassium current class, the members of which may be important in the regulation of the fast repolarizing phase of action potentials in heart and thus may influence the duration of cardiac action potential. KCNA4 also contributes to the cardiac transient outward potassium current (Ito1), the main contributing current to the repolarizing phase 1 of the cardiac action potential. This gene has been shown to interact with DLG4, KCNA2 and DLG1.

Potassium voltage-gated channel subfamily A member 4; HPCN2; Voltage-gated K (+) channel HuKII ; Voltage-gated potassium channel HBK4; Voltage-gated potassium channel HK1 ; Voltage-gated potassium channel subunit Kv1.4; KCNA4; KCNA4L

A synthetic peptide corresponding to a sequence at the C-terminus of human Kv1.4, different from the related mouse sequence by two amino acids, and from the related rat sequence by one amino acid.

Voltage-gated potassium channel that mediates transmembrane potassium transport in excitable membranes. Forms tetrameric potassium-selective channels through which potassium ions pass in accordance with their electrochemical gradient. The channel alternates between opened and closed conformations in response to the voltage difference across the membrane (PubMed:19912772, PubMed:8495559) . Can form functional homotetrameric channels and heterotetrameric channels that contain variable proportions of KCNA1, KCNA2, KCNA4, KCNA5, and possibly other family members as well; channel properties depend on the type of alpha subunits that are part of the channel (PubMed:8495559) . Channel properties are modulated by cytoplasmic beta subunits that regulate the subcellular location of the alpha subunits and promote rapid inactivation. In vivo, membranes probably contain a mixture of heteromeric potassium channel complexes, making it difficult to assign currents observed in intact tissues to any particular potassium channel family member. Homotetrameric KCNA4 forms a potassium channel that opens in response to membrane depolarization, followed by rapid spontaneous channel closure (PubMed:19912772, PubMed:8495559) . Likewise, a heterotetrameric channel formed by KCNA1 and KCNA4 shows rapid inactivation (PubMed:17156368) . .

1. Entrez Gene: KCNA4 potassium voltage-gated channel, shaker-related subfamily, member 4. 2. Gutman GA, Chandy KG, Grissmer S, Lazdunski M, McKinnon D, Pardo LA, Robertson GA, Rudy B, Sanguinetti MC, Stuhmer W, Wang X (Dec 2005) . International Union of Pharmacology. LIII. Nomenclature and molecular relationships of voltage-gated potassium channels. Pharmacol Rev 57 (4) : 473–508. 3. Philipson LH, Schaefer K, LaMendola J, Bell GI, Steiner DF (Feb 1991) .Sequence of a human fetal skeletal muscle potassium channel cDNA related to RCK4. Nucleic Acids Res 18 (23) : 7160.