Год выпуска: 2013 Автор: Ajaz Ahmad Waza and Mahboob Ul Hussain Издательство: LAP Lambert Academic Publishing Страниц: 92 ISBN: 9783659457029
Описание
Adenosine-triphosphate-sensitive K+channels [K+(ATP)] are the protein channels responsive to changes in ATP/adenosine diphosphate (ADP) ratio and provide a means to couple movement of potassium ions, to relate membrane potential with cellular energy status. Various subfamilies of K+(ATP) channel proteins, designated as Kir1.0 to 7.0, share significant amino-acid homology (40%) among them. The Kir6.0 subfamily consists of Kir6.1 and Kir6.2 proteins with around 70% amino acid homology. Kir6.1 is widely expressed in tissues, including pancreatic islets, heart, skeletal muscle and brain. K+(ATP) channels are assembled from two different subunits, a Kir subunit that forms the ion-conducting pore and a sulfonylurea receptor (SUR), a member of the ABCC subfamily. Activation of an K+(ATP) channel is known to be an important part of endogenous protective signalling that promotes cellular survival under conditions of metabolic stress. More recently, evidences suggest that activation of...