>cd03214 ABC_Iron-Siderophores_B12_Hemin ABC transporters, involved in the uptake of siderophores, heme, and vitamin B12, are widely conserved in bacteria and archaea. Only very few species lack representatives of the siderophore family transporters. The E. coli BtuCD protein is an ABC transporter mediating vitamin B12 uptake. The two ATP-binding cassettes (BtuD) are in close contact with each other, as are the two membrane-spanning subunits (BtuC); this arrangement is distinct from that observed for the E. coli lipid flippase MsbA. The BtuC subunits provide 20 transmembrane helices grouped around a translocation pathway that is closed to the cytoplasm by a gate region, whereas the dimer arrangement of the BtuD subunits resembles the ATP-bound form of the Rad50 DNA repair enzyme. A prominent cytoplasmic loop of BtuC forms the contact region with the ATP-binding cassette and represent a conserved motif among the ABC transporters.

Probab=90.66 E-value=0.98 Score=24.72 Aligned_cols=116 Identities=18% Similarity=0.215 Sum_probs=59.3 Q ss_pred CEEEEECCCCHHHHHHHHHHHHHHHHCC-CCEEEE------EC------CCHHHHHHHHHHHC-CC-CCEEEEEECCCCC Q ss_conf 6199844753157999999999985146-847997------15------21001344555430-38-9768996235572 Q gi|254780619|r 219 AVSLISGVTGSGKTEVYLEIVAAVLHLG-KQVLIL------LP------EISLTSAILERFQK-RF-GVKPAEWHSSLST 283 (731) Q Consensus 219 ~~~LL~GvTGSGKTEVYl~li~~~L~~G-kqvLiL------vP------EI~Lt~Q~~~rl~~-rF-~~~v~v~HS~ls~ 283 (731) T Consensus 26 e~~~liG~nGsGKTTL-l~~i~G~~~~~~G~I~~~g~~i~~~~~~~~~~~i~~v~Q~l~~~~l~~~~~~~~----~~LSG 100 (180) T cd03214 26 EIVGILGPNGAGKSTL-LKTLAGLLKPSSGEILLDGKDLASLSPKELARKIAYVPQALELLGLAHLADRPF----NELSG 100 (180) T ss_pred CEEEEECCCCCCHHHH-HHHHHCCCCCCCCEEEECCEECCCCCHHHHHCCCCHHHHHHHHCCCHHHHCCCH----HHCCH T ss_conf 7999998999889999-999957989987289999999896999999554649999999859977864991----03799 Q ss_pred HHHHHHHHHHHCCCCEEEEECCHHHHHHHCCCEEEEEEECCCCCCHHCCCCCCCHHHHHHHHHHHCCCCEECCCC Q ss_conf 356678999971997399940012110010001367740553210000244322489999975110321000024 Q gi|254780619|r 284 SMREKIWRQVARGAISVIVGVRSALFLPFKKLGLIVIDEEHDISYKQEEGILYNARDMSIVRGKIESFPVVLVSA 358 (731) Q Consensus 284 ~eR~~~w~~i~~G~~~IVIGtRSAif~P~~nLglIIvDEEHd~sykq~~~pry~aRdvA~~Ra~~~~~~lilgSA 358 (731) T Consensus 101 GqkQrv~iA~----------------aL~~~P~ililDEPts~---LD~~~~~~i~~~i~~l~~~~~~tii~itH 156 (180) T cd03214 101 GERQRVLLAR----------------ALAQEPPILLLDEPTSH---LDIAHQIELLELLRRLARERGKTVVMVLH 156 (180) T ss_pred HHHHHHHHHH----------------HHHHCCCEEEECCCCCC---CCHHHHHHHHHHHHHHHHHCCCEEEEEEC T ss_conf 9999999999----------------99868964788587544---79999999999999999846989999907

HHsearch alignment for GI: 254780619 and conserved domain: cd03214