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Target intelligence / Profile preview
Pancreatic beta cell ATP-sensitive potassium channel (KATP channel)
- Target
- KATP channel
- Molecular classification
- Ion channel, Potassium channel, ATP-gated channel, ABC transporter (SUR1 subunit)
01
Overview
The ATP-sensitive potassium (KATP) channel in pancreatic beta cells is a hetero-octameric complex composed of four Kir6.2 (KCNJ11) and four SUR1 (ABCC8) subunits. It couples cellular metabolism to electrical activity and insulin secretion. Increased intracellular ATP closes the channel, leading to depolarization and insulin release. Sulfonylureas bind to SUR1, mimicking the effect of ATP and stimulating insulin secretion. Mutations in KCNJ11 or ABCC8 can cause neonatal diabetes or congenital hyperinsulinism.
- Other names
- ATP-sensitive potassium channelKATP channel in pancreatic beta cellsKir6.2/SUR1 channel
02
Mechanism of action
Sulfonylureas bind to SUR1, closing the KATP channel and depolarizing the beta cell, leading to insulin secretion.
03
Biological functions
Regulation of insulin secretionCoupling metabolism to electrical activityPotassium ion transportRegulation of membrane potential
04
Disease associations
Neonatal diabetesCongenital hyperinsulinismType 2 diabetesHyperinsulinemic hypoglycemia
05
Safety considerations
Hypoglycemia (with sulfonylurea use)Drug-induced hyperinsulinismPotential for cardiovascular side effects with some sulfonylureasGenetic variability affecting drug response
06
Interacting drugs
Sulfonylureas
5 more in the full profile.
07
Biomarkers
Genetic mutations in KCNJ11 (Kir6.2) and ABCC8 (SUR1) as predictors of neonatal diabetes or congenital hyperinsulinismE23K polymorphism in Kir6.2 as a risk factor for type 2 diabetes
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