9.A.22 The Putative Bacillus Transporter of Unknown Function (BTUF) Family
A single 6 TMS protein, originally termed NhaE of Bacillus pseudofirmus OF4, had been reported in TCDB as an exchanger of H+ for either Na+ or K+ , but the results were not reproduced and a paper was not published. Members of this family are therefore of unknown function.
This family belongs to the: MusI (MusI) Superfamily.
References associated with 9.A.22 family:
Cheng, J., A.A. Guffanti, and T.A. Krulwich. (1997). A two-gene ABC-type transport system that extrudes Na+ in Bacillus subtilis is induced by ethanol or protonophore. Mol. Microbiol. 23: 1107-1120. 9106203