>TIGR02857 CydD ABC transporter, CydDC cysteine exporter (CydDC-E) family, permease/ATP-binding protein CydD; InterPro: IPR014216 The gene pair cydCD encodes an ABC-family transporter in which each gene contains an N-terminal membrane-spanning domain and a C-terminal ATP-binding domain. In Escherichia coli these genes were discovered as mutants which caused the terminal heme-copper oxidase complex cytochrome bd to fail to assemble. Recent work has shown that the transporter is involved in the export of redox-active thiol compounds such as cysteine and glutathione , . The linkage to assembly of the cytochrome bd complex is further supported by the conserved operon structure found outside the gammaproteobacteria (cydABCD) containing both the transporter and oxidase genes components. The genes used as the seed members for this entry are all either found in the gammaproteobacterial context, or the CydABCD context. All members of this entry scoring above the trusted cut off at the time of its creation were from genomes which encode a cytochrome bd complex. Unfortunately, the gene symbol nomenclature, based on this operon in Bacillus subtilis, assigns cydC to the third gene in the operon, where this gene is actually homologous to the E. coli cydD gene. We have chosen to name all homologues in this family in accordance with the precedence of publication of the E. coli name, CydD..

Probab=92.50 E-value=0.19 Score=31.23 Aligned_cols=143 Identities=16% Similarity=0.168 Sum_probs=87.5 Q ss_pred HHHHHHCCCCCEEEEECCCCCCCHHHHHHHHHHHHHCCCC---C------CCCCHHHCCCC-CCCHHHHHHHCCCCCCEE Q ss_conf 9999982889816631179898889999999999817799---8------86431210126-788679999678987545 Q gi|254780217|r 24 LSQYYCSGRMHHALLFEGEQGIGKATLGFRYAGHVLQNPD---F------SKAPVRMCNPD-PCSPFVKQMASHALHDFL 93 (347) Q Consensus 24 L~~~~~~~~l~ha~Lf~Gp~GiGK~~~A~~~A~~llc~~~---~------~~~~~~~~~~~-~~~~~~~~i~~~~hpd~~ 93 (347) T Consensus 371 ~sf~~~pG~~---vAl~G~SGaGKSTLL~lLLGf~~P~~G~i~v~~~Gg~~G~~L~~~~~~W~W~~~ia--Wv~Q~P~l~ 445 (570) T TIGR02857 371 VSFTVEPGER---VALVGPSGAGKSTLLNLLLGFVEPTEGAIVVERDGGINGVPLAEADADWSWRDQIA--WVPQHPFLF 445 (570) T ss_pred CCEEECCCCE---EEEEECCCCCHHHHHHHHHCCCCCCCCEEEEECCCCCCCCCCCCCCHHHHHHHCEE--EECCCCCCC T ss_conf 5416638704---88862799978899999971576446468874488853976421131022554134--305666013 Q ss_pred EECC----------------------------------CCHHHCCCCCCCCCHHHHHHH-HHHCCCCCCCCCCHHHHHHH Q ss_conf 3001----------------------------------000101342123237887554-43102221111210353220 Q gi|254780217|r 94 YLSY----------------------------------SLNPKTGKWRTVITVDEIRRI-RYFLSLTANTGYWRVIMIDP 138 (347) Q Consensus 94 ~i~~----------------------------------~~~~k~~~~~~~I~vd~IR~l-~~~~~~~~~~~~~Ki~IId~ 138 (347) T Consensus 446 ~gtiaeNi~La~~~A~~~~~~~A~~~agl~~~~~~LP~Gl~t~~Ge~G~GLSGGq~QRlALARafl~~~~a-~~llLLDE 524 (570) T TIGR02857 446 AGTIAENIRLARPDASDAEIREALERAGLDEFVAALPQGLDTPIGEGGAGLSGGQAQRLALARAFLRDATA-APLLLLDE 524 (570) T ss_pred HHHHHHHHHHCCCCCCHHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCCCCCCHHHHHHHHHHHHHHCHHHC-CCCEEEEC T ss_conf 64799999734899998999999999728999997111313435888884779999999999996061111-76035407 Q ss_pred HH-HCCHHHHHHHHHHHHHCC-CCCCEEEEECCCCC Q ss_conf 55-424000145677766303-43416765044335 Q gi|254780217|r 139 VD-GMNRNAANALLKSLEEPP-QKVLFILISHASPT 172 (347) Q Consensus 139 ad-~ln~~AaNALLK~LEEPp-~~t~fiLit~~~~~ 172 (347) T Consensus 525 PTAhLD~~tEa~v~~~~~~l~A~grtvl~v~Hr~~~ 560 (570) T TIGR02857 525 PTAHLDAETEAEVLEALRALAAQGRTVLLVTHRLAL 560 (570) T ss_pred CCCCCCHHHHHHHHHHHHHHHHCCCEEEEEECCHHH T ss_conf 764321899999999999997379889999766899

HHsearch alignment for GI: 254780217 and conserved domain: TIGR02857