ID   COXX_SULTO              Reviewed;         301 AA.
AC   Q970T4; F9VNG4;
DT   08-APR-2008, integrated into UniProtKB/Swiss-Prot.
DT   14-DEC-2011, sequence version 3.
DT   25-MAY-2022, entry version 101.
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=STK_15180;
OS   Sulfurisphaera tokodaii (strain DSM 16993 / JCM 10545 / NBRC 100140 / 7)
OS   (Sulfolobus tokodaii).
OC   Archaea; Crenarchaeota; Thermoprotei; Sulfolobales; Sulfolobaceae;
OC   Sulfurisphaera.
OX   NCBI_TaxID=273063;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 16993 / JCM 10545 / NBRC 100140 / 7;
RX   PubMed=11572479; DOI=10.1093/dnares/8.4.123;
RA   Kawarabayasi Y., Hino Y., Horikawa H., Jin-no K., Takahashi M., Sekine M.,
RA   Baba S., Ankai A., Kosugi H., Hosoyama A., Fukui S., Nagai Y.,
RA   Nishijima K., Otsuka R., Nakazawa H., Takamiya M., Kato Y., Yoshizawa T.,
RA   Tanaka T., Kudoh Y., Yamazaki J., Kushida N., Oguchi A., Aoki K.,
RA   Masuda S., Yanagii M., Nishimura M., Yamagishi A., Oshima T., Kikuchi H.;
RT   "Complete genome sequence of an aerobic thermoacidophilic Crenarchaeon,
RT   Sulfolobus tokodaii strain7.";
RL   DNA Res. 8:123-140(2001).
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}.
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DR   EMBL; BA000023; BAK54610.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q970T4; -.
DR   SMR; Q970T4; -.
DR   STRING; 273063.STK_15180; -.
DR   EnsemblBacteria; BAK54610; BAK54610; STK_15180.
DR   KEGG; sto:STK_15180; -.
DR   PATRIC; fig|273063.9.peg.1725; -.
DR   eggNOG; arCOG00479; Archaea.
DR   OMA; QFFWQFP; -.
DR   UniPathway; UPA00834; UER00712.
DR   Proteomes; UP000001015; 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; 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; Reference proteome;
KW   Transferase; Transmembrane; Transmembrane helix.
FT   CHAIN           1..301
FT                   /note="Protoheme IX farnesyltransferase"
FT                   /id="PRO_0000327199"
FT   TRANSMEM        30..50
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        55..75
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        106..126
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        127..147
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        152..172
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        177..197
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        233..253
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT   TRANSMEM        281..301
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
SQ   SEQUENCE   301 AA;  32862 MW;  61778366EE011B11 CRC64;
     MKITRIYVRL MAISLSRKLI DYIKLSKPRV ISLLDLAAIA GFVLGLPKAI NITSIIVSFL
     AVIIGGSLAS GGGMIINGGL EIEKDKKMKR TSWRPTVKGE VGRKEAYAIG SIFIVVGTLI
     GFLANPLTAL FIALGAFIYV VIYSIWLKPR TWWNIVIGGF AGSAAAWAGF AASSGSFTLL
     SFLLGFLIFM WTPGHFWSLA LRFRDDYKNA EIPMLPVLTD ERTSAKAIAI SNALMVPFAL
     LIGLYAGLIY LIVSTIVSAF LLYVSVKLYL NPTADEAWES FKLSSPYLAI ILLTLIIVKL
     I