Target intelligence / Profile preview

Potassium voltage-gated channel subfamily J member 11 (KCNJ11)

Target
KCNJ11
Molecular classification
Ion channel, Potassium channel, Inward rectifier potassium channel
01

Overview

Potassium voltage-gated channel subfamily J member 11 (KCNJ11) encodes the Kir6.2 protein, a key component of ATP-sensitive potassium (KATP) channels. These channels are integral membrane proteins that allow potassium ions to flow more readily into the cell than out. The activity of these channels is regulated by G-proteins and they function in association with sulfonylurea receptors (SUR), forming hetero-octameric complexes critical for cellular excitability and insulin secretion. Mutations or polymorphisms in KCNJ11 are linked with congenital hyperinsulinism, permanent neonatal diabetes mellitus and type II diabetes mellitus.

Other names
Kir6.2ATP-sensitive inward rectifier potassium channel 11
02

Mechanism of action

Sulfonylureas bind to the SUR subunit of the KATP channel, inhibiting its activity and promoting insulin secretion.

03

Biological functions

Regulation of insulin secretionCardiac conductionMaintenance of resting membrane potentialRegulation of cellular excitability
04

Disease associations

Congenital hyperinsulinismPermanent neonatal diabetes mellitusType II diabetes mellitus
05

Safety considerations

Hypoglycemia (with sulfonylurea drugs)Cardiac arrhythmias
06

Interacting drugs

Sulfonylureas

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