ID   Q9PL26_CHLMU            Unreviewed;       351 AA.
AC   Q9PL26;
DT   01-OCT-2000, integrated into UniProtKB/TrEMBL.
DT   01-OCT-2000, sequence version 1.
DT   04-NOV-2026, entry version 111.
DE   SubName: Full=Cytochrome D ubiquinol oxidase, subunit II {ECO:0000313|EMBL:AAF39150.1};
GN   Name=cydB {ECO:0000313|EMBL:AAF39150.1};
GN   OrderedLocusNames=TC_0282 {ECO:0000313|EMBL:AAF39150.1};
OS   Chlamydia muridarum (strain MoPn / Nigg).
OC   Bacteria; Pseudomonadati; Chlamydiota; Chlamydiia; Chlamydiales;
OC   Chlamydiaceae; Chlamydia/Chlamydophila group; Chlamydia.
OX   NCBI_TaxID=243161 {ECO:0000313|EMBL:AAF39150.1, ECO:0000313|Proteomes:UP000000800};
RN   [1] {ECO:0000313|EMBL:AAF39150.1, ECO:0000313|Proteomes:UP000000800}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=MoPn / Nigg {ECO:0000313|Proteomes:UP000000800};
RX   PubMed=10684935; DOI=10.1093/nar/28.6.1397;
RA   Read T.D., Brunham R.C., Shen C., Gill S.R., Heidelberg J.F., White O.,
RA   Hickey E.K., Peterson J.D., Utterback T.R., Berry K.J., Bass S.,
RA   Linher K.D., Weidman J.F., Khouri H.M., Craven B., Bowman C., Dodson R.J.,
RA   Gwinn M.L., Nelson W.C., DeBoy R.T., Kolonay J.F., McClarty G.,
RA   Salzberg S.L., Eisen J.A., Fraser C.M.;
RT   "Genome sequences of Chlamydia trachomatis MoPn and Chlamydia pneumoniae
RT   AR39.";
RL   Nucleic Acids Res. 28:1397-1406(2000).
CC   -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000256|ARBA:ARBA00004651};
CC       Multi-pass membrane protein {ECO:0000256|ARBA:ARBA00004651}.
CC   -!- SIMILARITY: Belongs to the cytochrome ubiquinol oxidase subunit 2
CC       family. {ECO:0000256|ARBA:ARBA00007543}.
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DR   EMBL; AE002160; AAF39150.1; -; Genomic_DNA.
DR   PIR; B81721; B81721.
DR   RefSeq; WP_010230030.1; NC_002620.2.
DR   AlphaFoldDB; Q9PL26; -.
DR   GeneID; 1246452; -.
DR   KEGG; cmu:TC_0282; -.
DR   PATRIC; fig|243161.6.peg.308; -.
DR   eggNOG; COG1294; Bacteria.
DR   HOGENOM; CLU_049294_1_0_0; -.
DR   OrthoDB; 9776710at2; -.
DR   Proteomes; UP000000800; Chromosome.
DR   GO; GO:0070069; C:cytochrome complex; IEA:TreeGrafter.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0009055; F:electron transfer activity; IEA:TreeGrafter.
DR   GO; GO:0016682; F:oxidoreductase activity, acting on diphenols and related substances as donors, oxygen as acceptor; IEA:TreeGrafter.
DR   GO; GO:0019646; P:aerobic electron transport chain; IEA:TreeGrafter.
DR   InterPro; IPR003317; Cyt-d_oxidase_su2.
DR   NCBIfam; TIGR00203; cydB; 1.
DR   PANTHER; PTHR43141:SF5; CYTOCHROME BD-I UBIQUINOL OXIDASE SUBUNIT 2; 1.
DR   PANTHER; PTHR43141; CYTOCHROME BD2 SUBUNIT II; 1.
DR   Pfam; PF02322; Cyt_bd_oxida_II; 1.
DR   PIRSF; PIRSF000267; Cyt_oxidse_sub2; 1.
PE   3: Inferred from homology;
KW   Cell membrane {ECO:0000256|ARBA:ARBA00022475};
KW   Electron transport {ECO:0000256|ARBA:ARBA00022982};
KW   Heme {ECO:0000256|ARBA:ARBA00022617}; Iron {ECO:0000256|ARBA:ARBA00023004};
KW   Membrane {ECO:0000256|ARBA:ARBA00023136, ECO:0000256|SAM:Phobius};
KW   Metal-binding {ECO:0000256|ARBA:ARBA00022723};
KW   Reference proteome {ECO:0000313|Proteomes:UP000000800};
KW   Transmembrane {ECO:0000256|ARBA:ARBA00022692, ECO:0000256|SAM:Phobius};
KW   Transmembrane helix {ECO:0000256|ARBA:ARBA00022989,
KW   ECO:0000256|SAM:Phobius}; Transport {ECO:0000256|ARBA:ARBA00022448}.
FT   TRANSMEM        12..38
FT                   /note="Helical"
FT                   /evidence="ECO:0000256|SAM:Phobius"
FT   TRANSMEM        59..78
FT                   /note="Helical"
FT                   /evidence="ECO:0000256|SAM:Phobius"
FT   TRANSMEM        84..105
FT                   /note="Helical"
FT                   /evidence="ECO:0000256|SAM:Phobius"
FT   TRANSMEM        117..144
FT                   /note="Helical"
FT                   /evidence="ECO:0000256|SAM:Phobius"
FT   TRANSMEM        164..188
FT                   /note="Helical"
FT                   /evidence="ECO:0000256|SAM:Phobius"
FT   TRANSMEM        200..220
FT                   /note="Helical"
FT                   /evidence="ECO:0000256|SAM:Phobius"
FT   TRANSMEM        240..258
FT                   /note="Helical"
FT                   /evidence="ECO:0000256|SAM:Phobius"
FT   TRANSMEM        270..295
FT                   /note="Helical"
FT                   /evidence="ECO:0000256|SAM:Phobius"
FT   TRANSMEM        315..338
FT                   /note="Helical"
FT                   /evidence="ECO:0000256|SAM:Phobius"
SQ   SEQUENCE   351 AA;  39199 MW;  433FDDEE9519A112 CRC64;
     MELATILPVI WYAILCIAVF AYALGDGFDL GLSTIYFLSK EEKERRLLLN SIGPVWDGNE
     VWFVIIFAGL FAGFPSAYGT LLSIFYMPIW TMVMLYVFRG CSLEFRSKAE SRRWKFFWDI
     LFSASGTFIS FFLGTLSGNL LLGLPIAPET SYSSLSWGLF FRPYSVLCGL FVVAAFALHG
     ISFALTKTAE GFQLRLKNRF YYVLSAYLVL YLGLLIATML GRPHAIGVCC RLGIGTGIPA
     YPLLILLAVA TFSCCYAEKK AMDVSKYGKA FAFSCINLLF PILAYNVLLF PNLLVSSVDG
     RYTITIFNAA VDPKALQHLI TIVLIGLPFV IAYAVYVYRV FRGKTDFPSI Y
//