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CTAA_METRJ
ID   CTAA_METRJ              Reviewed;         367 AA.
AC   B1M282;
DT   02-SEP-2008, integrated into UniProtKB/Swiss-Prot.
DT   29-APR-2008, sequence version 1.
DT   03-AUG-2022, entry version 73.
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};
GN   OrderedLocusNames=Mrad2831_2709;
OS   Methylobacterium radiotolerans (strain ATCC 27329 / DSM 1819 / JCM 2831 /
OS   NBRC 15690 / NCIMB 10815 / 0-1).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Hyphomicrobiales;
OC   Methylobacteriaceae; Methylobacterium.
OX   NCBI_TaxID=426355;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 27329 / DSM 1819 / JCM 2831 / NBRC 15690 / NCIMB 10815 / 0-1;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Glavina del Rio T., Dalin E., Tice H.,
RA   Bruce D., Goodwin L., Pitluck S., Kiss H., Brettin T., Detter J.C., Han C.,
RA   Kuske C.R., Schmutz J., Larimer F., Land M., Hauser L., Kyrpides N.,
RA   Mikhailova N., Marx C.J., Richardson P.;
RT   "Complete sequence of chromosome of Methylobacterium radiotolerans JCM
RT   2831.";
RL   Submitted (MAR-2008) to the EMBL/GenBank/DDBJ databases.
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; CP001001; ACB24693.1; -; Genomic_DNA.
DR   RefSeq; WP_012319662.1; NC_010505.1.
DR   AlphaFoldDB; B1M282; -.
DR   SMR; B1M282; -.
DR   STRING; 426355.Mrad2831_2709; -.
DR   EnsemblBacteria; ACB24693; ACB24693; Mrad2831_2709.
DR   KEGG; mrd:Mrad2831_2709; -.
DR   PATRIC; fig|426355.14.peg.2774; -.
DR   eggNOG; COG1612; Bacteria.
DR   HOGENOM; CLU_017627_0_0_5; -.
DR   OMA; YWWEWGH; -.
DR   OrthoDB; 1135592at2; -.
DR   UniPathway; UPA00269; UER00713.
DR   Proteomes; UP000006589; 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_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; Reference proteome; Transmembrane; Transmembrane helix.
FT   CHAIN           1..367
FT                   /note="Heme A synthase"
FT                   /id="PRO_0000349046"
FT   TRANSMEM        12..32
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01665"
FT   TRANSMEM        99..119
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01665"
FT   TRANSMEM        127..147
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01665"
FT   TRANSMEM        163..183
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01665"
FT   TRANSMEM        198..218
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01665"
FT   TRANSMEM        266..286
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01665"
FT   TRANSMEM        296..316
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01665"
FT   TRANSMEM        317..337
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01665"
FT   BINDING         264
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         324
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   367 AA;  38802 MW;  718D448015675629 CRC64;
     MDMSGAGDRR SGAVRTWLYV VAALVVAMVA VGGATRLTGS GLSITEWRPV TGAIPPLTEA
     DWAAEFAKYR DTPQYNILNQ GMGLSAFKVL YGWEWGHRLL GRVIGLVFFL PLILFWWQGR
     ISRRLGLGLL GLGLLGGLQG AIGWIMVASG LQPGMTAVAP LKLALHLTTA SLILAGLVWL
     AAGERRGVLA PAPARLRATA LLLPILVLVQ IFLGGLVAGS HAGLVYNTWP TMDGQLVPPL
     DSLFAIRPWI ENFVDNHALV QFDHRVTAYL VFVVAVLHAV DARLTGPKSA AGRAAGVVIL
     VLAQMALGIA TLLLAVPLWA ALAHQVLAMA VLTMATVHAR LSRGFGLVEP AAAEPPLGFE
     GLAGGRI
 
 
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