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Molecular cloning and functional characterization of two alternatively spliced Ntcp isoforms from mouse liver1
V Cattori1, U Eckhardt, B Hagenbuch
1Division of Clinical Pharmacology and Toxicology, Department of Medicine, University Hospital, CH-8091, Zurich, Switzerland.
Biochimica Et Biophysica Acta
|April 21, 1999
Abstract:
To isolate the murine Na+/taurocholate cotransporting polypeptide (Ntcp), we screened a mouse liver cDNA library and identified Ntcp1, encoding a 362 amino acid protein and Ntcp2, encoding a 317 amino acid protein which had a shorter C-terminal end. Both isoforms mediated saturable Na+-dependent transport of taurocholate when expressed in Xenopus laevis oocytes. Analysis of the gene revealed that Ntcp2 is produced by alternative splicing where the last intron is retained.