CTAA_BRUAB
ID CTAA_BRUAB Reviewed; 358 AA.
AC Q57DW5;
DT 02-SEP-2008, integrated into UniProtKB/Swiss-Prot.
DT 10-MAY-2005, sequence version 1.
DT 03-AUG-2022, entry version 82.
DE RecName: Full=Heme A synthase {ECO:0000255|HAMAP-Rule:MF_01665};
DE Short=HAS {ECO:0000255|HAMAP-Rule:MF_01665};
DE EC=1.17.99.9 {ECO:0000255|HAMAP-Rule:MF_01665};
DE AltName: Full=Cytochrome aa3-controlling protein {ECO:0000255|HAMAP-Rule:MF_01665};
GN Name=ctaA {ECO:0000255|HAMAP-Rule:MF_01665}; OrderedLocusNames=BruAb1_0801;
OS Brucella abortus biovar 1 (strain 9-941).
OC Bacteria; Proteobacteria; Alphaproteobacteria; Hyphomicrobiales;
OC Brucellaceae; Brucella/Ochrobactrum group; Brucella.
OX NCBI_TaxID=262698;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=9-941;
RX PubMed=15805518; DOI=10.1128/jb.187.8.2715-2726.2005;
RA Halling S.M., Peterson-Burch B.D., Bricker B.J., Zuerner R.L., Qing Z.,
RA Li L.-L., Kapur V., Alt D.P., Olsen S.C.;
RT "Completion of the genome sequence of Brucella abortus and comparison to
RT the highly similar genomes of Brucella melitensis and Brucella suis.";
RL J. Bacteriol. 187:2715-2726(2005).
CC -!- FUNCTION: Catalyzes the conversion of heme O to heme A by two
CC successive hydroxylations of the methyl group at C8. The first
CC hydroxylation forms heme I, the second hydroxylation results in an
CC unstable dihydroxymethyl group, which spontaneously dehydrates,
CC resulting in the formyl group of heme A. {ECO:0000255|HAMAP-
CC Rule:MF_01665}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=2 A + Fe(II)-heme o + H2O = 2 AH2 + Fe(II)-heme a;
CC Xref=Rhea:RHEA:63388, ChEBI:CHEBI:13193, ChEBI:CHEBI:15377,
CC ChEBI:CHEBI:17499, ChEBI:CHEBI:60530, ChEBI:CHEBI:61715;
CC EC=1.17.99.9; Evidence={ECO:0000255|HAMAP-Rule:MF_01665};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:63389;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01665};
CC -!- COFACTOR:
CC Name=heme b; Xref=ChEBI:CHEBI:60344;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01665};
CC -!- PATHWAY: Porphyrin-containing compound metabolism; heme A biosynthesis;
CC heme A from heme O: step 1/1. {ECO:0000255|HAMAP-Rule:MF_01665}.
CC -!- SUBUNIT: Interacts with CtaB. {ECO:0000255|HAMAP-Rule:MF_01665}.
CC -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000255|HAMAP-Rule:MF_01665};
CC Multi-pass membrane protein {ECO:0000255|HAMAP-Rule:MF_01665}.
CC -!- SIMILARITY: Belongs to the COX15/CtaA family. Type 2 subfamily.
CC {ECO:0000255|HAMAP-Rule:MF_01665}.
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DR EMBL; AE017223; AAX74169.1; -; Genomic_DNA.
DR RefSeq; WP_002969419.1; NC_006932.1.
DR AlphaFoldDB; Q57DW5; -.
DR SMR; Q57DW5; -.
DR EnsemblBacteria; AAX74169; AAX74169; BruAb1_0801.
DR GeneID; 45124223; -.
DR GeneID; 55590500; -.
DR KEGG; bmb:BruAb1_0801; -.
DR HOGENOM; CLU_017627_0_0_5; -.
DR OMA; YWWEWGH; -.
DR UniPathway; UPA00269; UER00713.
DR Proteomes; UP000000540; Chromosome I.
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:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0016653; F:oxidoreductase activity, acting on NAD(P)H, heme protein as acceptor; IEA:InterPro.
DR GO; GO:0006784; P:heme A biosynthetic process; IEA:UniProtKB-UniRule.
DR HAMAP; MF_01665; HemeA_synth_type2; 1.
DR InterPro; IPR003780; COX15/CtaA_fam.
DR InterPro; IPR023754; HemeA_Synthase_type2.
DR PANTHER; PTHR23289; PTHR23289; 1.
DR Pfam; PF02628; COX15-CtaA; 1.
PE 3: Inferred from homology;
KW Cell membrane; Heme biosynthesis; Iron; Membrane; Metal-binding;
KW Oxidoreductase; Transmembrane; Transmembrane helix.
FT CHAIN 1..358
FT /note="Heme A synthase"
FT /id="PRO_0000349020"
FT TRANSMEM 25..45
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01665"
FT TRANSMEM 111..131
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01665"
FT TRANSMEM 141..161
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01665"
FT TRANSMEM 176..196
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01665"
FT TRANSMEM 210..230
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01665"
FT TRANSMEM 269..289
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01665"
FT TRANSMEM 304..324
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01665"
FT TRANSMEM 326..346
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01665"
FT BINDING 273
FT /ligand="heme"
FT /ligand_id="ChEBI:CHEBI:30413"
FT /ligand_part="Fe"
FT /ligand_part_id="ChEBI:CHEBI:18248"
FT /note="axial binding residue"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01665"
FT BINDING 334
FT /ligand="heme"
FT /ligand_id="ChEBI:CHEBI:30413"
FT /ligand_part="Fe"
FT /ligand_part_id="ChEBI:CHEBI:18248"
FT /note="axial binding residue"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01665"
SQ SEQUENCE 358 AA; 40048 MW; 4DF7F2FBFAF09798 CRC64;
MAATSAQHIG LQGHGTSRND RDRRLVRYWL YAVFAVLIAI VMVGGATRMT GSGLSITEWK
PIHGVIPPLN HAEWVEEFEK YQQIPQYQQI NKGMSLAEFQ YIFWWEWAHR LLARFVGFLV
AVPLGFFWLT GRLKGGLKYR MLGLLALGGL QGAIGWWMVA SGLSELTSVS QYRLAIHLTT
ACVIITAVFY IARGLVTYSE RPAERSIQRF AGWIVFAVLV QIYLGGLVAG LHAGLTYNTW
PLMDGAIIPS DLFTQAPWWR NLFENPKTVQ FVHRMFAYTV LLLAILHAVQ VWKNAPGTTH
ARRTIVLVGL VFIQAMIGIA TLLMSAPLHL GLTHQFFALV VLAFAVAHWR ATKGAYAA
