Literature DB >> 15702539

Rice Na+/H+-antiporter Nhx1 partially complements the alkali-metal-cation sensitivity of yeast strains lacking three sodium transporters.

O Kinclová-Zimmermannová1, H Flegelová, H Sychrová.   

Abstract

A triple mutant strain of Saccharomyces cerevisiae lacking its own Na+-ATPases and Na+/H+ antiporters (enal-4delta nha1delta nhx1delta) was used for the expression of the Oryza sativa NHX1 gene encoding a putative vacuolar Na+/H+ exchanger. Upon expression in yeast cells, the OsNhx 1p is not a transport system specific only for sodium cations but it has a broad substrate specificity for at least four alkali metal cations (Na+, Li+, K+ and Rb+) and is able to substitute for the endogenous yeast ScNhx1 antiporter. Its activity contributes to sequestration of alkali metal cations in intracellular vesicles.

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Year:  2004        PMID： 15702539     DOI： 10.1007/bf02931527

Source DB:  PubMed          Journal:  Folia Microbiol (Praha)        ISSN： 0015-5632            Impact factor:   2.099


  37 in total

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  4 in total

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