Potassium voltage-gated channel subfamily D member 1 (KCND1)

Potassium voltage-gated channel subfamily D member 1 (KCND1) is a pore-forming alpha subunit of the A-type voltage-gated potassium channel family (Kv4.1). It is a multipass membrane protein essential for mediating the fast, transient outward potassium current (I_A) in excitable cells, notably within the brain and heart. KCND1 plays a key role in the repolarization phase of action potentials, thereby contributing to the regulation of neuronal firing patterns, circadian rhythms, cardiac conduction, hormone secretion (such as insulin), and smooth muscle contraction. Dysregulation or genetic variants of KCND1 are associated with diseases including epilepsy and Long QT syndrome, and research suggests a possible role in cancer cell proliferation. The channel's activity is modulated by regulatory subunits and biochemical factors, but it remains primarily a research target rather than a current therapeutic target in clinical practice[1][2][4][6].

Other names

Kv4.1Shal-type potassium channel KCND1Voltage-gated potassium channel subunit Kv4.1A-type voltage-gated potassium channel KCND1Potassium voltage-gated channel, Shal-related subfamily, member 1Potassium channel, voltage gated Shal related subfamily D, member 1Shal-type potassium channel

Drugs that inhibit A-type voltage-gated potassium channels reduce the A-type potassium current (I_A), affecting neuronal excitability, action potential repolarization, and possibly circadian patterns[4][1].