MgADP binding to the high-affinity 'consensus' ATPase active site of SUR1 and remodeling of the L0-loop (lasso region) overrides tonic ATP inhibition of KATP channels.
Gregory M Martin, Balamurugan Kandasamy ... Show-Ling Shyng
A structure of a pancreatic ATP-sensitive potassium channel complex at 3.63Å resolution obtained by cryo-electron microscopy reveals how a commonly used anti-diabetic drug interacts with and inhibits the channel to stimulate insulin secretion.
Local ATP production by the plasma membrane-associated glycolytic enzyme pyruvate kinase is essential for the nutrient-dependent closure of the ATP-sensitive potassium channels that initiate insulin release from pancreatic β-cells.
Hua-Qian Yang, Marta Pérez-Hernández ... William A Coetzee
The functional interaction of Na+ and KATP channels at the intercalated disk of cardiomyocytes depends on Ankyrin G and is clinically relevant since KATP channel mutations affect Na+ channel expression.
Jeremy F Atherton, Eileen L McIver ... Mark D Bevan
In mouse models of Huntington's disease, the subthalamic nucleus, which suppresses movements, also exhibits impaired glutamate homeostasis, NMDA receptor-dependent mitochondrial oxidant stress, firing disruption, and 30% neuronal loss.
Jennifer K Briggs, Anne Gresch ... Richard KP Benninger
The functional network of β-cells in the pancreatic islet, which has been used to identify important subpopulations of β-cells implicated in diabetes progression, is indicative of intrinsic dynamics rather than structural communication, implying islet robustness.
The essential role of focal adhesion kinase in locally regulating insulin secretion and calcium responses in pancreatic beta cells is identified through the use of the pancreatic slice technique.
Increases of extracellular potassium silence capillary pericyte calcium signaling, suggesting a participation of capillary pericytes in the potassium-mediated neurovascular communication.
Gregory M Martin, Min Woo Sung ... Show-Ling Shyng
Diverse KATP channel inhibitors occupy a common binding pocket and stabilize an interaction between Kir6.2 and SUR1 to allosterically control gating and promote the assembly and trafficking of nascent channels.