Article
Alteration of Na(+)-coupled transport in site-directed mutants of the melibiose carrier of Escherichia coli.
Biochimica et biophysica acta - 25 Jul 1996
Franco P J, Wilson T H
Abstract excerpt
Asn-58 of the Escherichia coli melibiose carrier was replaced by Ala, Leu, Ser, and Gln. Trp-54 was replaced by Leu and a double mutant Leu-54/Ala-58 was constructed using site-directed mutagenesis. Cation/sugar cotransport and sugar-induced cation uptake were studied for each mutant. The change of Asn-58 to Ala results in a nearly complete loss of Na(+)-stimulated galactoside transport as well as...
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