title: Anoctamin 6 is an essential component of the outwardly rectifying chloride channel.
abstract: Outwardly rectifying chloride channels (ORCC, ICOR) of intermediate single-channel conductance of around 50 pS, are ubiquitously expressed, but have remained a mystery since their description more than 25 y ago. These channels have been shown to be activated on membrane excision and depolarization of the membrane voltage and by cAMP in the presence of the cystic fibrosis transmembrane conductance regulator. We show that anoctamin 6 (Ano6), a member of the recently identified family of putative Cl(-) channels, is the crucial component of ORCC single-channel and whole-cell currents in airway epithelial cells and Jurkat T lymphocytes. Cystic fibrosis transmembrane conductance regulator augmented ORCC produced by Ano6 in A549 airway epithelial cells. Ano6 is activated during membrane depolarization or apoptosis of Jurkat T lymphocytes and epithelial cells, and is inhibited by 5-nitro-2-(3-phenylpropylamino) benzoic acid, 4,4'-diisothio-cyanostilbene-2,2'-disulfonic acid, or AO1. Ano6 belongs to the basic equipment of any cell type, including colonic surface epithelial cells. It forms the essential component of ORCC and seems to have a role for cell shrinkage and programmed cell death.
authors: Institut für Physiologie,  Universität Regensburg, D-93053 Regensburg,  Germany.
authors: Joana Raquel
authors: JR
authors: Martins
authors: Diana
authors: D
authors: Faria
authors: Patthara
authors: P
authors: Kongsuphol
authors: Barbara
authors: B
authors: Reisch
authors: Rainer
authors: R
authors: Schreiber
authors: Karl
authors: K
authors: Kunzelmann
mesh_terms: D000075368:Anoctamins; D015153:Blotting, Western; D018118:Chloride Channels / Q000502:physiology*; D019005:Cystic Fibrosis Transmembrane Conductance Regulator / Q000502:physiology; D006801:Humans; D019169:Jurkat Cells; D018408:Patch-Clamp Techniques; D049294:Phospholipid Transfer Proteins / Q000502:physiology*
chemical_list: C555078:ANO6 protein, human; D000075368:Anoctamins; D018118:Chloride Channels; D049294:Phospholipid Transfer Proteins; D019005:Cystic Fibrosis Transmembrane Conductance Regulator