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Yasuo Watanabe, Yasutaka Shimono, Hiromitsu Tsuji, Youichi Tamai
The effect of replacement of negatively charged amino acid residues on the function of Na+ transport proteins of the salt-tolerant yeast Zygosaccharomyces rouxii was examined by heterologous expression of mutant proteins in a strain of Saccharomyces cerevisiae, RH16.6, that lacks native Na+-ATPase activity due to null mutations of ENA1, ENA2, ENA3, and ENA4. Mutants of Na+/H+ antiporter gene (ZrSOD2) and Na+-ATPase gene (ZrENA1) of Z. rouxii were generated by site-directed mutagenesis. The significance of two aspartic residues arranged in tandem (D265 and D266) was demonstrated in Z...
March 19, 2002: FEMS Microbiology Letters
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