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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Cloning and characterization of the human urea transporter UT-A1 and mapping of the human Slc14a2 gene.

We have isolated and characterized the human homolog of the rat largest urea transporter of the UT-A family (hUT-A1). The 4.2-kb hUT-A1 cDNA encodes a 920-amino acid peptide, which is 89% identical to the rat UT-A1 protein. By Northern hybridization, hUT-A1 expression is detected in the human inner medulla as a approximately 4.4-kb mRNA transcript. By Western analysis, hUT-A1 is identified as a approximately 100-kDa protein in the human inner medulla. By immunohistochemistry, hUT-A1 expression is localized to the inner medullary collecting duct (IMCD). When transfected into HEK-293 cells hUT-A1 cDNA is translated into a approximately 98-kDa protein. Expression of hUT-A1 in Xenopus oocytes results in phloretin-inhibitable uptake of (14)C-urea, which shows only modest stimulation by cAMP, suggesting that in the human IMCD vasopressin may have a limited role in the short-term regulation of hUT-A1-mediated urea transport. We determined the organization of the human Slc14a2 gene and identified 20 exons distributed over approximately 67.5 kb on chromosome 18, from which hUT-A1 and the other human urea transporter, hUT-A2, are transcribed.[1]

References

  1. Cloning and characterization of the human urea transporter UT-A1 and mapping of the human Slc14a2 gene. Bagnasco, S.M., Peng, T., Janech, M.G., Karakashian, A., Sands, J.M. Am. J. Physiol. Renal Physiol. (2001) [Pubmed]
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