ID   COXX_SALRD              Reviewed;         283 AA.
AC   Q2S012;
DT   02-SEP-2008, integrated into UniProtKB/Swiss-Prot.
DT   02-SEP-2008, sequence version 2.
DT   25-MAY-2022, entry version 97.
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=SRU_2369;
OS   Salinibacter ruber (strain DSM 13855 / M31).
OC   Bacteria; Bacteroidetes; Bacteroidetes Order II. Incertae sedis;
OC   Rhodothermaceae; Salinibacter.
OX   NCBI_TaxID=309807;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 13855 / CECT 5946 / M31;
RX   PubMed=16330755; DOI=10.1073/pnas.0509073102;
RA   Mongodin E.F., Nelson K.E., Daugherty S., DeBoy R.T., Wister J., Khouri H.,
RA   Weidman J., Walsh D.A., Papke R.T., Sanchez Perez G., Sharma A.K.,
RA   Nesbo C.L., MacLeod D., Bapteste E., Doolittle W.F., Charlebois R.L.,
RA   Legault B., Rodriguez-Valera F.;
RT   "The genome of Salinibacter ruber: convergence and gene exchange among
RT   hyperhalophilic bacteria and archaea.";
RL   Proc. Natl. Acad. Sci. U.S.A. 102:18147-18152(2005).
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}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=ABC46358.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR   EMBL; CP000159; ABC46358.1; ALT_INIT; Genomic_DNA.
DR   RefSeq; YP_446469.1; NC_007677.1.
DR   AlphaFoldDB; Q2S012; -.
DR   SMR; Q2S012; -.
DR   STRING; 309807.SRU_2369; -.
DR   PRIDE; Q2S012; -.
DR   EnsemblBacteria; ABC46358; ABC46358; SRU_2369.
DR   KEGG; sru:SRU_2369; -.
DR   PATRIC; fig|309807.25.peg.2468; -.
DR   eggNOG; COG0109; Bacteria.
DR   HOGENOM; CLU_029631_3_2_10; -.
DR   UniPathway; UPA00834; UER00712.
DR   Proteomes; UP000008674; 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..283
FT                   /note="Protoheme IX farnesyltransferase"
FT                   /id="PRO_0000346069"
FT   TRANSMEM        13..33
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        35..55
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        90..110
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        156..176
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        208..228
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        230..250
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        262..282
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
SQ   SEQUENCE   283 AA;  30309 MW;  BA71121155F0E12A CRC64;
     MLWDYLILAK PEISSVVTLS AFAGFLIGSP TGLDGGTLLW TMLGTALCAG GVGTLNHVLE
     RRYDAQMKRT AQRPLPAGRA DPKMARRVGI LLVCLAVGLL CPLVNVLTAV LAALTAVLYL
     FVYTPLKRTT KWNTLVGTVP GALPALGGYT AATGHLGAGG WATFGILATW QMPHFLSLAW
     MYRKDYARGD YAMLPVVEPD GNSTAAQMIG FAALLVPVSV LPVLTEAAGW IYGVGVVPLG
     LWFLWTTIVF HGERTGQKAK RVLKASVLYI PGLVALLLVD WFL