Journal
IUBMB LIFE
Volume 61, Issue 10, Pages 971-978Publisher
WILEY
DOI: 10.1002/iub.246
Keywords
K-ATP channels; diabetes; hyperinsulinism; cardiovascular; SUR; Kir6.2
Categories
Funding
- NATIONAL HEART, LUNG, AND BLOOD INSTITUTE [R01HL054171, R01HL045742, R01HL095010] Funding Source: NIH RePORTER
- NHLBI NIH HHS [R01 HL095010-04, R01 HL045742, R01 HL045742-18, R01 HL054171, R01 HL054171-16, R01 HL095010] Funding Source: Medline
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The ATP-sensitive potassium (KATP) channel is expressed in most excitable tissues and plays a critical role in numerous physiological processes by coupling intracellular energetics to electrical activity. The channel is comprised of four Kir6.x subunits associated with four regulatory sulfonylurea receptors (SUR). Intracellular ATP acts on Kir6.x to inhibit channel activity, while MgADP stimulates channel activity through SUR. Changes in the cytosolic [ATP] to [ADP] ratio thus determine channel activity. Multiple mutations in Kir6.x and SUR genes have implicated KATP channels in various diseases ranging from diabetes and hyperinsulinism to cardiac arrhythmias and cardiovascular disease. Continuing studies of channel physiology and pathology will bring new insights to the molecular basis of KATP channel function, leading to a better understanding of the role that KATP channels play in both health and disease. (C) 2009 IUBMB IUBMB Life, 61(10): 971-978, 2009
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