ID   COXX_MYCSS              Reviewed;         310 AA.
AC   Q1B9B1;
DT   08-APR-2008, integrated into UniProtKB/Swiss-Prot.
DT   08-APR-2008, sequence version 2.
DT   03-AUG-2022, entry version 79.
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=Mmcs_2415;
OS   Mycobacterium sp. (strain MCS).
OC   Bacteria; Actinobacteria; Corynebacteriales; Mycobacteriaceae;
OC   Mycobacterium; unclassified Mycobacterium.
OX   NCBI_TaxID=164756;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=MCS;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C.,
RA   Glavina del Rio T., Hammon N., Israni S., Dalin E., Tice H., Pitluck S.,
RA   Martinez M., Schmutz J., Larimer F., Land M., Hauser L., Kyrpides N.,
RA   Kim E., Miller C.D., Hughes J.E., Anderson A.J., Sims R.C., Richardson P.;
RT   "Complete sequence of chromosome of Mycobacterium sp. MCS.";
RL   Submitted (JUN-2006) to the EMBL/GenBank/DDBJ databases.
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 membrane {ECO:0000255|HAMAP-Rule:MF_00154};
CC       Multi-pass membrane protein {ECO:0000255|HAMAP-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}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=ABG08523.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR   EMBL; CP000384; ABG08523.1; ALT_INIT; Genomic_DNA.
DR   AlphaFoldDB; Q1B9B1; -.
DR   SMR; Q1B9B1; -.
DR   KEGG; mmc:Mmcs_2415; -.
DR   HOGENOM; CLU_029631_0_1_11; -.
DR   BioCyc; MSP164756:G1G6O-2466-MON; -.
DR   UniPathway; UPA00834; UER00712.
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; IPR044878; UbiA_sf.
DR   PANTHER; PTHR43448; PTHR43448; 1.
DR   Pfam; PF01040; UbiA; 1.
DR   TIGRFAMs; TIGR01473; cyoE_ctaB; 1.
PE   3: Inferred from homology;
KW   Cell membrane; Heme biosynthesis; Membrane; Transferase; Transmembrane;
KW   Transmembrane helix.
FT   CHAIN           1..310
FT                   /note="Protoheme IX farnesyltransferase"
FT                   /id="PRO_0000327089"
FT   TRANSMEM        31..51
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        102..122
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        124..144
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        149..169
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        170..190
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        242..262
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        289..309
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
SQ   SEQUENCE   310 AA;  33824 MW;  CA577F40EBB391FA CRC64;
     MSIRERHLSH GAPSRIRTTV LAYLALTKPR VIELLLVTAI PAMLLADRGS VDPLLILNTL
     IGGMLAAAGA NTLNCVADAD IDKKMKRTAR RPLARDTVPT RNALIFGLVL SVGSFFWLWG
     TSNLLSGLLA VATIAFYVFV YTLLLKRRTS QNVVWGGAAG CMPVMIGWSA VTGTIQWPAL
     VMFAIIFFWT PPHTWALAMR YKDDYKAAGV PMLPAVATER QVTRQILIYT WLTVLTTLAL
     ALATGWLYAS VAVLAGTWFL VMAHQLYNGV KRGEPVKPLR LFLQSNNYLA VVFAALAVDS
     VLALPTLLGS