Two N-terminal domains regulate binding to and modulation by KCNIP1.
Pore-forming (alpha) subunit of voltage-gated A-type potassium channels that mediates transmembrane potassium transport in excitable membranes, in brain and heart (By similarity). In cardiomyocytes, may generate the transient outward potassium current I(To). In neurons, may conduct the transient subthreshold somatodendritic A-type potassium current (ISA) (By similarity). Kinetics properties are characterized by fast activation at subthreshold membrane potentials, rapid inactivation, and quick recovery from inactivation. Channel properties are modulated by interactions with regulatory subunits. Interaction with the regulatory subunits KCNIP1 or KCNIP2 modulates the channel gating kinetics namely channel activation and inactivation kinetics and rate of recovery from inactivation. Likewise, interaction with DPP6 modulates the channel gating kinetics namely channel activation and inactivation kinetics (By similarity).
Regulated through phosphorylation at Ser-569 by CaMK2D.
Belongs to the potassium channel family. D (Shal) (TC 1.A.1.2) subfamily. Kv4.3/KCND3 sub-subfamily.
A-type voltage-gated potassium channel KCND3, Potassium voltage-gated channel subfamily D member 3, Voltage-gated potassium channel subunit Kv4.3, Kcnd3
Proteins
Neuroscience
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