>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=97.85 E-value=0.0002 Score=47.53 Aligned_cols=124 Identities=22% Similarity=0.278 Sum_probs=70.1 Q ss_pred CCCCCCEEEEEECCCCHHHHHHHHHHHHHHHCCCEEEEEECCCC--CCH-HHHHHHCC--------CHHHEEEEECC--- Q ss_conf 72688079997068723789999998752008987999973885--566-88998198--------83344897258--- Q gi|255764460|r 63 GFPKGRIVEIYGPESSGKTTLALHTIAQSQKTGGTCAFVDAEHA--LDS-IYARKLGV--------DLKNLLISQPD--- 128 (363) Q Consensus 63 G~p~Gri~ei~G~~~sGKTtlal~~~a~~qk~g~~~~~iD~E~~--~~~-~~a~~~Gv--------d~~~l~~~~~~--- 128 (363) T Consensus 21 ~i~~Ge~~~liG~nGsGKTTLl~~i~G~~~~~~G~I~~-~g~~i~~~~~~~~~~~i~~v~Q~l~~~~l~~~~~~~~~~LS 99 (180) T cd03214 21 SIEAGEIVGILGPNGAGKSTLLKTLAGLLKPSSGEILL-DGKDLASLSPKELARKIAYVPQALELLGLAHLADRPFNELS 99 (180) T ss_pred EECCCCEEEEECCCCCCHHHHHHHHHCCCCCCCCEEEE-CCEECCCCCHHHHHCCCCHHHHHHHHCCCHHHHCCCHHHCC T ss_conf 88699799999899988999999995798998728999-99998969999995546499999998599778649910379 Q ss_pred CHH-HHHHHHHHHHHCCCCCEEEEECCCCCCCHHHHHHHHHHHCCCHHHHHHHHHHHHHHHHHCCCCCEEEEEECCCC Q ss_conf 489-99999999974489768998143332202655434555302247888767767777642017818999863411 Q gi|255764460|r 129 TGE-QALEITDMLVRSGAVDIIVIDSVAALTPRAEIEGDMGESLPGMQARLMSQALRKLTSSISRSKCILVFINQMRM 205 (363) Q Consensus 129 ~~E-~~~~i~~~li~~~~~~liViDSi~al~p~~Eie~~~~d~~~g~~ar~ms~~lrkl~~~~~k~~~~~i~iNQ~r~ 205 (363) T Consensus 100 GGqkQrv~iA~aL~~~--P~ililDEPts----------------~LD~~~~~~i~~~i~~l~~~~~~tii~itHdl~ 159 (180) T cd03214 100 GGERQRVLLARALAQE--PPILLLDEPTS----------------HLDIAHQIELLELLRRLARERGKTVVMVLHDLN 159 (180) T ss_pred HHHHHHHHHHHHHHHC--CCEEEECCCCC----------------CCCHHHHHHHHHHHHHHHHHCCCEEEEEECCHH T ss_conf 9999999999999868--96478858754----------------479999999999999999846989999907989

HHsearch alignment for GI: 255764460 and conserved domain: cd03214