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    Science. 1990 Aug 31;249(4972):1023-6.

    Alteration of alpha 1 Na+,K(+)-ATPase 86Rb+ influx by a single amino acid substitution.

    Herrera VL, Ruiz-Opazo N.

    Section of Molecular Genetics, Whitaker Cardiovascular Institute, Boston University School of Medicine, MA 02118.

    Erratum in:

    • Science 1991 Jul 26;253(5018):366.

    The sodium- and potassium-dependent adenosine triphosphatase (Na+,K(+)-ATPase) maintains the transmembrane Na+ gradient to which is coupled all active cellular transport systems. The R and S alleles of the gene encoding the Na+,K(+)-ATPase alpha 1 subunit isoform were identified in Dahl salt-resistant (DR) and Dahl salt-sensitive (DS) rats, respectively. Characterization of the S allele-specific Na+,K(+)-ATPase alpha 1 complementary DNA identified a leucine substitution of glutamine at position 276. This mutation alters the hydropathy profile of a region in proximity to T3(Na), the trypsin-sensitive site that is only detected in the presence of Na+. This mutation causes a decrease in the rubidium-86 influx of S allele-specific sodium pumps, thus marking a domain in the Na+,K(+)-ATPase alpha subunit important for K+ transport, and supporting the hypothesis of a putative role of these pumps in hypertension.

    PMID: 1975705 [PubMed - indexed for MEDLINE]

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