Kir61SUR2B

Kir61SUR2B refers to a specific type of ATP-sensitive potassium channel. These channels are crucial in regulating cellular processes by responding to intracellular levels of adenosine triphosphate (ATP). The Kir61 subunit, also known as KCNJ11, forms the pore-forming subunit of the channel, dictating its ion selectivity and conductance. The SUR2B subunit, encoded by the ABCC9 gene, is an accessory protein that binds to Kir61 and modulates its activity and gating properties. Specifically, SUR2B is a sulfonylurea receptor subunit. The combination of Kir61 and SUR2B forms a functional ATP-sensitive potassium channel with a distinct pharmacological profile. These channels play significant roles in various tissues, including the cardiovascular system, where they contribute to regulating vascular tone and cardiac function. Mutations in the genes encoding Kir61 (KCNJ11) or SUR2B (ABCC9) can lead to a range of clinical conditions, highlighting the importance of this channel complex in human health.