>cd06550 TM_ABC_iron-siderophores_like Transmembrane subunit (TM), of Periplasmic Binding Protein (PBP)-dependent ATP-Binding Cassette (ABC) transporters involved in the uptake of siderophores, heme, vitamin B12, or the divalent cations Mg2+ and Zn2+. PBP-dependent ABC transporters consist of a PBP, two TMs, and two cytoplasmic ABCs, and are mainly involved in importing solutes from the environment. The solute is captured by the PBP which delivers it to a gated translocation pathway formed by the two TMs. The TMs are bundles of alpha helices that transverse the cytoplasmic membrane multiple times. The two ABCs bind and hydrolyze ATP and drive the transport reaction. Each TM has a prominent cytoplasmic loop which contacts an ABC and represents a conserved motif. The two TMs form either a homodimer (e.g. in the case of the BtuC subunits of the Escherichia coli BtuCD vitamin B12 transporter), a heterodimer (e.g. the TroC and TroD subunits of the Treponema pallidum general transition metal

Probab=97.29  E-value=0.011  Score=34.01  Aligned_cols=40  Identities=13%  Similarity=0.126  Sum_probs=35.6

Q ss_pred             HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
Q ss_conf             9999999642122233420232236799999879999999
Q gi|254780896|r  206 ISNAWRTIRDNQKAFFSLNTTIIFAKLSAFAVSSAFIGMA  245 (351)
Q Consensus       206 ~G~~lrAv~~n~~aA~~~Ginv~~~~~~af~is~~lAgia  245 (351)
T Consensus       148 ~~~~l~~l~~~~~~A~~lGi~v~~~~~~~l~l~~~~~~~~  187 (261)
T cd06550         148 LSRKLNLLTFDEDLAKSLGINVNLLRLLLLLLVALLVVAA  187 (261)
T ss_pred             HHHHHHHHHCCHHHHHHCCCCHHHHHHHHHHHHHHHHHHH
T ss_conf             9999999978989988769969999999999999999999