Protein
Inward rectifier potassium channel 16
Organism
Rattus norvegicus
Function
Inward rectifier potassium channels are characterized by a greater tendency to allow potassium to flow into the cell rather than out of it. Their voltage dependence is regulated by the concentration of extracellular potassium; as external potassium is raised, the voltage range of the channel opening shifts to more positive voltages. The inward rectification is mainly due to the blockage of outward current by internal magnesium. KCNJ16 may be involved in the regulation of fluid and pH balance (By similarity). In the kidney, together with KCNJ10, mediates basolateral K(+) recycling in distal tubules; this process is critical for Na(+) reabsorption at the tubules.
Similarity
Belongs to the inward rectifier-type potassium channel (TC 1.A.2.1) family. KCNJ16 subfamily.
Sequence
MSYYGSSYRIVNVDSKYPGYPPEHAIAEKRRARRRLLHKDGSCNVYFKHIFGEWGSYMVDIFTTLVDTKWRHMFVVFSLSYILSWLIFGSIFWLIALHHGDLLSDPDITPCVDNVHSFTAAFLFSLETQTTIGYGYRCVTEECSVAVLTVILQSILSCIINTFIIGAALAKMATARKRAQTIRFSYFALIGMRDGKLCLMWRIGDFRPNHVVEGTVRAQLLRYSEDSEGRMTMAFKDLKLVNDQIILVTPVTIVHEIDHESPLYALDRKAVAKDNFEILVTFIYTGDSTGTSHQSRSSYVPREILWGHRFHDVLEVKRKYYKVNCLQFEGSVEVYAPFCSAKQLDWKDQQLNNLEKTSPARGSCTSDTNTRRRSFSAVAMVSSCENPEETSLSPQDECKEVPYQKALLTLNRISMESQM