COXX_RICB8
ID COXX_RICB8 Reviewed; 300 AA.
AC A8GVN8;
DT 15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT 13-NOV-2007, sequence version 1.
DT 25-MAY-2022, entry version 77.
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=A1I_02720;
OS Rickettsia bellii (strain OSU 85-389).
OC Bacteria; Proteobacteria; Alphaproteobacteria; Rickettsiales;
OC Rickettsiaceae; Rickettsieae; Rickettsia; belli group.
OX NCBI_TaxID=391896;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=OSU 85-389;
RA Madan A., Lee H., Madan A., Yoon J.-G., Ryu G.-Y., Dasch G., Ereemeva M.;
RT "Complete genome sequencing of Rickettsia bellii.";
RL Submitted (SEP-2007) 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; CP000849; ABV78915.1; -; Genomic_DNA.
DR RefSeq; WP_012151735.1; NC_009883.1.
DR AlphaFoldDB; A8GVN8; -.
DR SMR; A8GVN8; -.
DR KEGG; rbo:A1I_02720; -.
DR HOGENOM; CLU_029631_0_2_5; -.
DR OMA; QFFWQFP; -.
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; 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..300
FT /note="Protoheme IX farnesyltransferase"
FT /id="PRO_1000011355"
FT TRANSMEM 31..51
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 92..112
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT TRANSMEM 123..145
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 179..199
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT TRANSMEM 225..245
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT TRANSMEM 247..267
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
FT TRANSMEM 280..300
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00154"
SQ SEQUENCE 300 AA; 33751 MW; AB1A20E6D86ECD6E CRC64;
MNSLTKSINL DKVSYPQSTV KDYILLMKPR VMSLVVFTGF SGMWLAPNSL HPFISVIALI
CIAIGAGSAG AINMWYDRDI DALMKRTQKR PIVRGAIEAD EALSFGLIMA FFSVFFMALC
VNFLSALLLL FTIFYYICIY TMWLKRSSIQ NIVIGGAAGA LPPVIGYASV SGSVSLDSVI
LFLIIFIWTP PHSWALALFC NDDYKNCKVP MMPVIKGALY TKKQILIYSV LLFLTSLMPF
FVGMSNIIYL VIAAVLGLVF LYYSISLFYD NADNKQAKRF FAYSIFYLFF IFLLLDFCRV
