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    Proc Natl Acad Sci U S A. 1990 Oct;87(19):7347-51.

    Human kidney amiloride-binding protein: cDNA structure and functional expression.

    Source

    Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Valbonne, France.

    Abstract

    Phenamil, an analog of amiloride, is a potent blocker of the epithelial Na+ channel. It has been used to purify the porcine kidney amiloride-binding protein. Synthetic oligonucleotides derived from partial sequences have been used to screen a human kidney cDNA library and to isolate the cDNA encoding the human amiloride-binding protein. The primary structure was deduced from the DNA sequence analysis. The protein is 713 residues long, with a 19-amino acid signal peptide. The mRNA was expressed in 293-S and NIH 3T3 cells, yielding a glycoprotein (i) that binds amiloride and amiloride analogs with affinities similar to the amiloride receptor associated with the apical Na+ channel in pig kidney membranes and (ii) that is immunoprecipitated with monoclonal antibodies raised against pig kidney amiloride-binding protein.

    PMID:
    2217167
    [PubMed - indexed for MEDLINE]
    PMCID:
    PMC54743
    Free PMC Article

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