CTAA_STAAR
ID CTAA_STAAR Reviewed; 303 AA.
AC Q6GHX0;
DT 02-SEP-2008, integrated into UniProtKB/Swiss-Prot.
DT 19-JUL-2004, sequence version 1.
DT 03-AUG-2022, entry version 95.
DE RecName: Full=Heme A synthase {ECO:0000255|HAMAP-Rule:MF_01664};
DE Short=HAS {ECO:0000255|HAMAP-Rule:MF_01664};
DE EC=1.17.99.9 {ECO:0000255|HAMAP-Rule:MF_01664};
DE AltName: Full=Cytochrome aa3-controlling protein {ECO:0000255|HAMAP-Rule:MF_01664};
GN Name=ctaA {ECO:0000255|HAMAP-Rule:MF_01664}; OrderedLocusNames=SAR1089;
OS Staphylococcus aureus (strain MRSA252).
OC Bacteria; Firmicutes; Bacilli; Bacillales; Staphylococcaceae;
OC Staphylococcus.
OX NCBI_TaxID=282458;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=MRSA252;
RX PubMed=15213324; DOI=10.1073/pnas.0402521101;
RA Holden M.T.G., Feil E.J., Lindsay J.A., Peacock S.J., Day N.P.J.,
RA Enright M.C., Foster T.J., Moore C.E., Hurst L., Atkin R., Barron A.,
RA Bason N., Bentley S.D., Chillingworth C., Chillingworth T., Churcher C.,
RA Clark L., Corton C., Cronin A., Doggett J., Dowd L., Feltwell T., Hance Z.,
RA Harris B., Hauser H., Holroyd S., Jagels K., James K.D., Lennard N.,
RA Line A., Mayes R., Moule S., Mungall K., Ormond D., Quail M.A.,
RA Rabbinowitsch E., Rutherford K.M., Sanders M., Sharp S., Simmonds M.,
RA Stevens K., Whitehead S., Barrell B.G., Spratt B.G., Parkhill J.;
RT "Complete genomes of two clinical Staphylococcus aureus strains: evidence
RT for the rapid evolution of virulence and drug resistance.";
RL Proc. Natl. Acad. Sci. U.S.A. 101:9786-9791(2004).
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_01664}.
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_01664};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:63389;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01664};
CC -!- COFACTOR:
CC Name=heme b; Xref=ChEBI:CHEBI:60344;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_01664};
CC -!- PATHWAY: Porphyrin-containing compound metabolism; heme A biosynthesis;
CC heme A from heme O: step 1/1. {ECO:0000255|HAMAP-Rule:MF_01664}.
CC -!- SUBUNIT: Interacts with CtaB. {ECO:0000255|HAMAP-Rule:MF_01664}.
CC -!- SUBCELLULAR LOCATION: Cell membrane {ECO:0000255|HAMAP-Rule:MF_01664};
CC Multi-pass membrane protein {ECO:0000255|HAMAP-Rule:MF_01664}.
CC -!- SIMILARITY: Belongs to the COX15/CtaA family. Type 1 subfamily.
CC {ECO:0000255|HAMAP-Rule:MF_01664}.
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DR EMBL; BX571856; CAG40091.1; -; Genomic_DNA.
DR RefSeq; WP_000467123.1; NC_002952.2.
DR AlphaFoldDB; Q6GHX0; -.
DR SMR; Q6GHX0; -.
DR KEGG; sar:SAR1089; -.
DR HOGENOM; CLU_041525_3_1_9; -.
DR OMA; YTGAYVR; -.
DR UniPathway; UPA00269; UER00713.
DR Proteomes; UP000000596; 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: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_01664; HemeA_synth_type1; 1.
DR InterPro; IPR003780; COX15/CtaA_fam.
DR InterPro; IPR023755; HemeA_Synthase_type1.
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..303
FT /note="Heme A synthase"
FT /id="PRO_0000348991"
FT TRANSMEM 9..29
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01664"
FT TRANSMEM 68..88
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01664"
FT TRANSMEM 94..114
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01664"
FT TRANSMEM 126..146
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01664"
FT TRANSMEM 164..184
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01664"
FT TRANSMEM 216..236
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01664"
FT TRANSMEM 245..265
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01664"
FT TRANSMEM 271..291
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01664"
FT BINDING 214
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_01664"
FT BINDING 276
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_01664"
SQ SEQUENCE 303 AA; 34060 MW; 213D3ECC1812C260 CRC64;
MFGKKNLKWL GVVATLMMTF VQLGGALVTK TGSADGCGSS WPLCHGALIP EFFPIDTIIE
LSHRAVSALS LLMVLWLVIT AWKHIGYIKE IKPLSIISVG FLLLQALIGA AAVIWQQNDY
VLALHFGISL ISFSSVFLIT LIIFSIDQKY EADELYIKKP LRRLTWLMAI IIYCGVYTGA
LVRHADASLA YGGWPLPFHD LVPHSEQDWV QLTHRIMAFI VFTIIMITYI HAVKNYPNNR
TVHYGYTAAF ILVILQVITG ALSIMTNVNL IIALFHALFI TYLFGMTTYF IMLMLRSVRS
DKQ
