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The osmotically regulated OpuA uptake system from Bacillus subtilis is a member of the SBP-dependent subfamily of ABC-transporters. The functional complex, OpuA(A 2 B 2 C), catalyzes the osmotically controlled import of the compatible solutes glycine betaine and proline betaine. Here, we describe the purification of the isolated TMS, OpuAB. Stimulated ATPase activity of OpuAA by OpuAB...
A member of the family of RTX toxins, Escherichia coli haemolysin A, is secreted from Gram-negative bacteria. It carries a C-terminal secretion signal of approximately 50 residues, targeting the protein to the secretion or translocation complex, in which the ABC-transporter HlyB is a central element. We have purified the nucleotide-binding domain of HlyB (HlyB–NBD) and a C-terminal 23kDa fragment...
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