title: CFTR Folding Consortium: methods available for studies of CFTR folding and correction.
abstract: The CFTR Folding Consortium (CFC) was formed in 2004 under the auspices of the Cystic Fibrosis Foundation and its drug discovery and development affiliate, CFF Therapeutics. A primary goal of the CFC is the development and distribution of reagents and assay methods designed to better understand the mechanistic basis of mutant CFTR misfolding and to identify targets whose manipulation may correct CFTR folding defects. As such, reagents available from the CFC primarily target wild-type CFTR NBD1 and its common variant, F508del, and they include antibodies, cell lines, constructs, and proteins. These reagents are summarized here, and two protocols are described for the detection of cell surface CFTR: (a) an assay of the density of expressed HA-tagged CFTR by ELISA and (b) the generation and use of an antibody to CFTR's first extracellular loop for the detection of endogenous CFTR. Finally, we highlight a systematic collection of assays, the CFC Roadmap, which is being used to assess the cellular locus and mechanism of mutant CFTR correction. The Roadmap queries CFTR structure-function relations at levels ranging from purified protein to well-differentiated human airway primary cultures.
authors.affiliation: Department of Cell Biology and Physiology, University of Pittsburgh, Pittsburgh, PA 15261, USA. kathi@pitt.edu
authors.forename: Kathryn W
authors.initials: KW
authors.lastname: Peters
authors.forename: Tsukasa
authors.initials: T
authors.lastname: Okiyoneda
authors.forename: William E
authors.initials: WE
authors.lastname: Balch
authors.forename: Ineke
authors.initials: I
authors.lastname: Braakman
authors.forename: Jeffrey L
authors.initials: JL
authors.lastname: Brodsky
authors.forename: William B
authors.initials: WB
authors.lastname: Guggino
authors.forename: Christopher M
authors.initials: CM
authors.lastname: Penland
authors.forename: Harvey B
authors.initials: HB
authors.lastname: Pollard
authors.forename: Eric J
authors.initials: EJ
authors.lastname: Sorscher
authors.forename: William R
authors.initials: WR
authors.lastname: Skach
authors.forename: Philip J
authors.initials: PJ
authors.lastname: Thomas
authors.forename: Gergely L
authors.initials: GL
authors.lastname: Lukacs
authors.forename: Raymond A
authors.initials: RA
authors.lastname: Frizzell
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000906:Antibodies / Q000378:metabolism*; D002460:Cell Line; D003550:Cystic Fibrosis / Q000235:genetics / Q000378:metabolism* / Q000503:physiopathology; D019005:Cystic Fibrosis Transmembrane Conductance Regulator / Q000235:genetics / Q000378:metabolism*; D004797:Enzyme-Linked Immunosorbent Assay; D005582:Foundations / Q000191:economics / Q000458:organization & administration*; D015870:Gene Expression; D006801:Humans; D007150:Immunohistochemistry / Q000379:methods*; D047468:Immunoprecipitation; D007202:Indicators and Reagents / Q000737:chemistry / Q000378:metabolism; D051379:Mice; D008958:Models, Molecular; D008969:Molecular Sequence Data; D009154:Mutation; D011487:Protein Conformation; D017510:Protein Folding; D012109:Research Support as Topic
chemical_list: D000906:Antibodies; D007202:Indicators and Reagents; D019005:Cystic Fibrosis Transmembrane Conductance Regulator