Expression and characterization of the cystic fibrosis transmembrane conductance regulator - PubMed (original) (raw)
. 1990 Sep 27;347(6291):382-6.
doi: 10.1038/347382a0.
Affiliations
- PMID: 1699127
- DOI: 10.1038/347382a0
Expression and characterization of the cystic fibrosis transmembrane conductance regulator
R J Gregory et al. Nature. 1990.
Abstract
Cystic fibrosis (CF) is a common lethal genetic disease that manifests itself in airway and other epithelial cells as defective chloride ion absorption and secretion, resulting at least in part from a defect in a cyclic AMP-regulated, outwardly-rectifying Cl- channel in the apical surface. The gene responsible for CF has been identified and predicted to encode a membrane protein termed the CF transmembrane conductance regulator (CFTR). Identification of a cryptic bacterial promoter within the CFTR coding sequence led us to construct a complementary DNA in a low-copy-number plasmid, thereby avoiding the deleterious effects of CFTR expression on Escherischia coli. We have used this cDNA to express CFTR in vitro and in vivo. Here we demonstrate that CFTR is a membrane-associated glycoprotein that can be phosporylated in vitro by cAMP-dependent protein kinase. Polyclonal and monoclonal antibodies directed against distinct domains of the protein immunoprecipitated recombinant CFTR as well as the endogenous CFTR in nonrecombinant T84 cells. Partial proteolysis fingerprinting showed that the recombinant and non-recombinant proteins are indistinguishable. These data, which establish several characteristics of the protein responsible for CF, will now enable CFTR function to be studied and will provide a basis for diagnosis and therapy.
Comment in
- Cystic fibrosis. Righting the wrong protein.
Quinton PM. Quinton PM. Nature. 1990 Sep 20;347(6290):226. doi: 10.1038/347226a0. Nature. 1990. PMID: 1698261 No abstract available.
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