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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

A new member of acid-sensing ion channels from pituitary gland.

Acid-sensing ion channels (ASICs) constitute a branch of the super-gene family of amiloride-sensitive sodium channels. So far five different ASICs have been cloned from mammalian tissues. They are activated by a drop of extracellular pH but differ with respect to effective agonist concentration, desensitization and mRNA expression pattern. Here we report cloning of ASIC4, a new protein showing about 45% identity to other ASICs. ASIC4 is 97% identical between rat and human and shows strongest expression in pituitary gland. Moreover, we detected expression throughout the brain, in spinal cord, and inner ear. ASIC4 cannot be activated by a drop of extracellular pH in Xenopus oocytes, suggesting association with other subunits or activation by a ligand different from protons. Our results suggest a role for ASICs also in endocrine glands.[1]


  1. A new member of acid-sensing ion channels from pituitary gland. Gründer, S., Geissler, H.S., Bässler, E.L., Ruppersberg, J.P. Neuroreport (2000) [Pubmed]
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