title: Calmodulin interacts with angiotensin-converting enzyme-2 (ACE2) and inhibits shedding of its ectodomain.
abstract: Angiotensin-converting enzyme-2 (ACE2) is a regulatory protein of the renin-angiotensin system (RAS) and a receptor for the causative agent of severe-acute respiratory syndrome (SARS), the SARS-coronavirus. We have previously shown that ACE2 can be shed from the cell surface in response to phorbol esters by a process involving TNF-alpha converting enzyme (TACE; ADAM17). In this study, we demonstrate that inhibitors of calmodulin also stimulate shedding of the ACE2 ectodomain, a process at least partially mediated by a metalloproteinase. We also show that calmodulin associates with ACE2 and that this interaction is decreased by calmodulin inhibitors.
authors: Institute of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK. d.w.lambert@leeds.ac.uk
authors: Daniel W
authors: DW
authors: Lambert
authors: Nicola E
authors: NE
authors: Clarke
authors: Nigel M
authors: NM
authors: Hooper
authors: Anthony J
authors: AJ
authors: Turner
mesh_terms: D000595:Amino Acid Sequence; D000085962:Angiotensin-Converting Enzyme 2; D002147:Calmodulin / Q000378:metabolism*; D002460:Cell Line; D004151:Dipeptides / Q000494:pharmacology; D006801:Humans; D047468:Immunoprecipitation; D008969:Molecular Sequence Data; D007703:Peptidyl-Dipeptidase A / Q000737:chemistry / Q000378:metabolism*; D011480:Protease Inhibitors / Q000494:pharmacology; D011485:Protein Binding; D017386:Sequence Homology, Amino Acid
chemical_list: D002147:Calmodulin; D004151:Dipeptides; C078131:N-(2(R)-2-(hydroxamidocarbonylmethyl)-4-methylpentanoyl)-L-tryptophan methylamide; D011480:Protease Inhibitors; D007703:Peptidyl-Dipeptidase A; C000705307:ACE2 protein, human; D000085962:Angiotensin-Converting Enzyme 2