ID   COXX_NITMU              Reviewed;         298 AA.
AC   Q2YCM2;
DT   08-APR-2008, integrated into UniProtKB/Swiss-Prot.
DT   20-DEC-2005, sequence version 1.
DT   25-MAY-2022, entry version 87.
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=Nmul_A0191;
OS   Nitrosospira multiformis (strain ATCC 25196 / NCIMB 11849 / C 71).
OC   Bacteria; Proteobacteria; Betaproteobacteria; Nitrosomonadales;
OC   Nitrosomonadaceae; Nitrosospira.
OX   NCBI_TaxID=323848;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 25196 / NCIMB 11849 / C 71;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., Glavina T.,
RA   Hammon N., Israni S., Pitluck S., Chain P., Malfatti S., Shin M.,
RA   Vergez L., Schmutz J., Larimer F., Land M., Hauser L., Kyrpides N.,
RA   Lykidis A., Richardson P.;
RT   "Complete sequence of chromosome 1 of Nitrosospira multiformis ATCC
RT   25196.";
RL   Submitted (AUG-2005) 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 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; CP000103; ABB73499.1; -; Genomic_DNA.
DR   RefSeq; WP_011379553.1; NZ_FNVK01000010.1.
DR   AlphaFoldDB; Q2YCM2; -.
DR   SMR; Q2YCM2; -.
DR   STRING; 323848.Nmul_A0191; -.
DR   EnsemblBacteria; ABB73499; ABB73499; Nmul_A0191.
DR   KEGG; nmu:Nmul_A0191; -.
DR   eggNOG; COG0109; Bacteria.
DR   HOGENOM; CLU_029631_0_2_4; -.
DR   OMA; QFFWQFP; -.
DR   OrthoDB; 1875497at2; -.
DR   UniPathway; UPA00834; UER00712.
DR   Proteomes; UP000002718; 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   Reference proteome; Transferase; Transmembrane; Transmembrane helix.
FT   CHAIN           1..298
FT                   /note="Protoheme IX farnesyltransferase"
FT                   /id="PRO_0000327101"
FT   TRANSMEM        26..46
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        52..72
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        99..119
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        120..140
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        148..168
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        174..194
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        219..239
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        241..261
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        276..296
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
SQ   SEQUENCE   298 AA;  32606 MW;  753F51EE51965436 CRC64;
     MATTSIAWQQ TASRVQQFYR LTKPRVVSLI VFTAVIGMFL SVPGVVPLDT LIFATVGIAF
     VAGAAAAVNC LVEQKIDAVM ARTRGRPLPR GTVTSPETFV FLALVGGAGL LILHQLVNPL
     TMWLTLGTFV GYAIIYTVIL KPMTPQNIVI GGASGAMPPV LGWAAVTGEV SADALLLFLI
     IFAWTPPHFW ALALYRKLEY AKVGMPMLPV THGDKFTRLH VLLYTLILIA VTLMPYATQM
     SGLIYLAGAI VLDVIFLYYA VKIYLNYSDQ LARSAFRYSI LYLAGLFAVL LVDHYIRF