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Molecular cloning and chromosome localization of a putative basolateral Na(+)-K(+)-2Cl- cotransporter from mouse inner medullary collecting duct (mIMCD-3) cells - PubMed

  • ️Sat Jan 01 1994

Comparative Study

. 1994 Oct 14;269(41):25677-83.

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  • PMID: 7929272

Free article

Comparative Study

Molecular cloning and chromosome localization of a putative basolateral Na(+)-K(+)-2Cl- cotransporter from mouse inner medullary collecting duct (mIMCD-3) cells

E Delpire et al. J Biol Chem. 1994.

Free article

Abstract

Electroneutral Na(+)-K(+)-2Cl- cotransporters represent one of the major routes for Cl- movement in epithelia. A secretory form of the cotransporter has been described in the basolateral membrane of a variety of epithelia from fish to mammals. We isolated a putative bumetanide-sensitive Na(+)-K(+)-2Cl- cotransporter cDNA, BSC2, from mIMCD-3 cells. Northern analysis indicates that in contrast to BSC1, the recently cloned renal-specific apical isoform of the cotransporter, BSC2 is expressed in secretory epithelia and thus appears to represent the basolateral isoform. Furthermore, BSC2 is also expressed in non-polarized cells, such as red cells and myocytes. Sequence comparison and chromosome localization demonstrate that BSC2 and BSC1 are different genes that diverged before the evolution of vertebrates.

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