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monovalent cation/H(+) antiporter subunit G
This family includes PhaG from Rhizobium meliloti Swiss:Q9ZNG0, MnhG from Staphylococcus aureus Swiss:Q9ZNG0, YufB from Bacillus subtilis Swiss:O05227. [1]. 9680201. The pha gene cluster of Rhizobium meliloti involved in pH adaptation and symbiosis encodes a novel type of K+ efflux system. Putnoky P, Kereszt A, Nakamura T, Endre G, Grosskopf E, Kiss P, Kondorosi A;. Mol Microbiol 1998;28:1091-1101. [2]. 9852009. A putative multisubunit Na+/H+ antiporter from Staphylococcus aureus. Hiramatsu T, Kodama K, Kuroda T, Mizushima T, Tsuchiya T;. J Bacteriol 1998;180:6642-6648. (from Pfam)
cation:proton antiporter
cation:proton antiporter functions in maintaining cation homeostasis and the pH of actively metabolizing cells; it may also be involved in regulating cell volume; similar to Alkalihalophilus pseudofirmus Na(+)/H(+) antiporter subunit G
This HMM represents a subfamily of small, transmembrane proteins believed to be components of Na+/H+ and K+/H+ antiporters. Members, including proteins designated MnhG from Staphylococcus aureus and PhaG from Rhizobium meliloti, show some similarity to chain L of the NADH dehydrogenase I, which also translocates protons.
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