Potassium voltage-gated channel subfamily S member 2 (KCNS2 (Kv9.2))

KCNS2 encodes Potassium voltage-gated channel subfamily S member 2 (Kv9.2), an “electrically silent” alpha subunit that does not form functional potassium channels on its own but instead coassembles with pore-forming subunits such as Kv2.1 and Kv2.2, modifying their activation and inactivation kinetics, voltage dependencies, and expression. This dynamic modulation fine-tunes neuronal excitability and signal transduction, especially in brain regions like the cortex, hippocampus, and cerebellum. Mutations or deletions in KCNS2 have been associated with essential tremor and neurodevelopmental disorders, and expression changes have been linked to neurodegenerative processes. The subunit functions in potassium ion transport but is not itself pore-forming, instead acting as a channel regulator. No direct pharmacological modulators are available or in clinical use for KCNS2, and its status as a disease biomarker or safety issue is theoretical at this stage.

Other names

Kv9.2KIAA1144Delayed-rectifier potassium channel regulatory subunit KCNS2Delayed-rectifier K(+) channel alpha subunit 2Delayed-rectifier potassium channel subunit Kv9.2Potassium voltage-gated channel modifier subfamily S member 2HCNS2KCNS2_HUMAN