ID   COXX_BARQU              Reviewed;         311 AA.
AC   Q6G0D0;
DT   08-APR-2008, integrated into UniProtKB/Swiss-Prot.
DT   19-JUL-2004, sequence version 1.
DT   03-AUG-2022, entry version 93.
DE   RecName: Full=Protoheme IX farnesyltransferase {ECO:0000255|HAMAP-Rule:MF_00154};
DE            EC=2.5.1.141 {ECO:0000255|HAMAP-Rule:MF_00154};
DE   AltName: Full=Heme B farnesyltransferase {ECO:0000255|HAMAP-Rule:MF_00154};
DE   AltName: Full=Heme O synthase {ECO:0000255|HAMAP-Rule:MF_00154};
GN   Name=ctaB {ECO:0000255|HAMAP-Rule:MF_00154}; OrderedLocusNames=BQ03590;
OS   Bartonella quintana (strain Toulouse) (Rochalimaea quintana).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Hyphomicrobiales;
OC   Bartonellaceae; Bartonella.
OX   NCBI_TaxID=283165;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Toulouse;
RX   PubMed=15210978; DOI=10.1073/pnas.0305659101;
RA   Alsmark U.C.M., Frank A.C., Karlberg E.O., Legault B.-A., Ardell D.H.,
RA   Canbaeck B., Eriksson A.-S., Naeslund A.K., Handley S.A., Huvet M.,
RA   La Scola B., Holmberg M., Andersson S.G.E.;
RT   "The louse-borne human pathogen Bartonella quintana is a genomic derivative
RT   of the zoonotic agent Bartonella henselae.";
RL   Proc. Natl. Acad. Sci. U.S.A. 101:9716-9721(2004).
CC   -!- FUNCTION: Converts heme B (protoheme IX) to heme O by substitution of
CC       the vinyl group on carbon 2 of heme B porphyrin ring with a
CC       hydroxyethyl farnesyl side group. {ECO:0000255|HAMAP-Rule:MF_00154}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=(2E,6E)-farnesyl diphosphate + H2O + heme b = diphosphate +
CC         Fe(II)-heme o; Xref=Rhea:RHEA:28070, ChEBI:CHEBI:15377,
CC         ChEBI:CHEBI:33019, ChEBI:CHEBI:60344, ChEBI:CHEBI:60530,
CC         ChEBI:CHEBI:175763; EC=2.5.1.141; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00154};
CC   -!- PATHWAY: Porphyrin-containing compound metabolism; heme O biosynthesis;
CC       heme O from protoheme: step 1/1. {ECO:0000255|HAMAP-Rule:MF_00154}.
CC   -!- SUBCELLULAR LOCATION: Cell inner membrane {ECO:0000255|HAMAP-
CC       Rule:MF_00154}; Multi-pass membrane protein {ECO:0000255|HAMAP-
CC       Rule:MF_00154}.
CC   -!- MISCELLANEOUS: Carbon 2 of the heme B porphyrin ring is defined
CC       according to the Fischer nomenclature. {ECO:0000255|HAMAP-
CC       Rule:MF_00154}.
CC   -!- SIMILARITY: Belongs to the UbiA prenyltransferase family. Protoheme IX
CC       farnesyltransferase subfamily. {ECO:0000255|HAMAP-Rule:MF_00154}.
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DR   EMBL; BX897700; CAF25859.1; -; Genomic_DNA.
DR   RefSeq; WP_011179152.1; NC_005955.1.
DR   AlphaFoldDB; Q6G0D0; -.
DR   SMR; Q6G0D0; -.
DR   STRING; 283165.BQ03590; -.
DR   EnsemblBacteria; CAF25859; CAF25859; BQ03590.
DR   KEGG; bqu:BQ03590; -.
DR   eggNOG; COG0109; Bacteria.
DR   HOGENOM; CLU_029631_0_2_5; -.
DR   OMA; QFFWQFP; -.
DR   OrthoDB; 1875497at2; -.
DR   UniPathway; UPA00834; UER00712.
DR   Proteomes; UP000000597; Chromosome.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0008495; F:protoheme IX farnesyltransferase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0048034; P:heme O biosynthetic process; IEA:UniProtKB-UniRule.
DR   CDD; cd13957; PT_UbiA_Cox10; 1.
DR   Gene3D; 1.10.357.140; -; 1.
DR   HAMAP; MF_00154; CyoE_CtaB; 1.
DR   InterPro; IPR006369; Protohaem_IX_farnesylTrfase.
DR   InterPro; IPR000537; UbiA_prenyltransferase.
DR   InterPro; IPR030470; UbiA_prenylTrfase_CS.
DR   InterPro; IPR044878; UbiA_sf.
DR   PANTHER; PTHR43448; PTHR43448; 1.
DR   Pfam; PF01040; UbiA; 1.
DR   TIGRFAMs; TIGR01473; cyoE_ctaB; 1.
DR   PROSITE; PS00943; UBIA; 1.
PE   3: Inferred from homology;
KW   Cell inner membrane; Cell membrane; Heme biosynthesis; Membrane;
KW   Transferase; Transmembrane; Transmembrane helix.
FT   CHAIN           1..311
FT                   /note="Protoheme IX farnesyltransferase"
FT                   /id="PRO_0000327012"
FT   TRANSMEM        32..52
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        53..73
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        104..124
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        125..145
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        153..173
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        180..200
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        224..244
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        245..265
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        290..310
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
SQ   SEQUENCE   311 AA;  34720 MW;  C76C33597CCF1EC1 CRC64;
     MFVSRELSDA SGKSIPPKSG IYDYITLLKP RVMSLVVFTA LVGLVVSPVS INPWYGFLAI
     LCIAIGGGGA GVLNMWYDAD IDAVMKRTKN RPIPSGKISS RKAFVFGMVL SMLSVLMMGK
     FINWFAALLL AFTIFFYIVI YTIWLKRRTP QNIVIGGAAG AFPPMIGCAA ATGTVNIESF
     LLFLIIFMWT PPHFWSLSLF SSLDYGAAGI PMMPNVRGER STKKQILFYT ILMTISAAGP
     FIIDFAGIFY AIFSTILSVI FIYFAYRLWK ADTYDATILM AKKTFFFSLF YLAAIFGILL
     IEFLVWYFII L