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Target intelligence / Profile preview
ATP-Sensitive Potassium Channel in Pancreatic Beta Cells (KATP channel)
- Target
- KATP channel
- Molecular classification
- Ion channel, Potassium channel, ATP-gated channel, Sulfonylurea receptor
01
Overview
The ATP-sensitive potassium channel (KATP channel) in pancreatic beta cells is a crucial molecular complex that links cellular metabolism to electrical activity, thereby regulating insulin secretion. It acts as a metabolic sensor, responding to changes in intracellular ATP and ADP levels, and plays a central role in glucose-stimulated insulin release. The KATP channel is a hetero-octameric protein complex composed of four pore-forming Kir6.2 subunits (encoded by the KCNJ11 gene) and four regulatory sulfonylurea receptor 1 (SUR1) subunits (encoded by the ABCC8 gene). Mutations in these genes can cause neonatal diabetes mellitus or congenital hyperinsulinism.
- Other names
- Pancreatic Beta Cell KATP Channel
02
Mechanism of action
Sulfonylureas bind to SUR1 and close the KATP channel independently of intracellular ATP/ADP ratios, stimulating insulin release.
03
Biological functions
Regulation of membrane potentialRegulation of insulin secretionMetabolic sensingCoupling metabolism to electrical excitability
04
Disease associations
Neonatal diabetes mellitusType 2 diabetesCongenital hyperinsulinism
05
Safety considerations
Hypoglycemia (due to sulfonylurea-induced insulin secretion)
06
Interacting drugs
Sulfonylureas
07
Biomarkers
E23K polymorphism in Kir6.2
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