HDOX1_STAA3
ID HDOX1_STAA3 Reviewed; 107 AA.
AC Q2FHU5;
DT 09-JAN-2007, integrated into UniProtKB/Swiss-Prot.
DT 21-MAR-2006, sequence version 1.
DT 03-AUG-2022, entry version 91.
DE RecName: Full=Heme oxygenase (staphylobilin-producing) 1 {ECO:0000255|HAMAP-Rule:MF_01272};
DE EC=1.14.99.48 {ECO:0000255|HAMAP-Rule:MF_01272};
DE AltName: Full=Heme-degrading monooxygenase 1 {ECO:0000255|HAMAP-Rule:MF_01272};
DE AltName: Full=Iron-regulated surface determinant 1 {ECO:0000255|HAMAP-Rule:MF_01272};
DE AltName: Full=Iron-responsive surface determinant 1 {ECO:0000255|HAMAP-Rule:MF_01272};
GN Name=isdG; OrderedLocusNames=SAUSA300_1035;
OS Staphylococcus aureus (strain USA300).
OC Bacteria; Firmicutes; Bacilli; Bacillales; Staphylococcaceae;
OC Staphylococcus.
OX NCBI_TaxID=367830;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=USA300;
RX PubMed=16517273; DOI=10.1016/s0140-6736(06)68231-7;
RA Diep B.A., Gill S.R., Chang R.F., Phan T.H., Chen J.H., Davidson M.G.,
RA Lin F., Lin J., Carleton H.A., Mongodin E.F., Sensabaugh G.F.,
RA Perdreau-Remington F.;
RT "Complete genome sequence of USA300, an epidemic clone of community-
RT acquired meticillin-resistant Staphylococcus aureus.";
RL Lancet 367:731-739(2006).
CC -!- FUNCTION: Allows bacterial pathogens to use the host heme as an iron
CC source. Catalyzes the oxidative degradation of the heme macrocyclic
CC porphyrin ring to the oxo-bilirubin chromophore staphylobilin (a
CC mixture of the linear tetrapyrroles 5-oxo-delta-bilirubin and 15-oxo-
CC beta-bilirubin) in the presence of a suitable electron donor such as
CC ascorbate or NADPH--cytochrome P450 reductase, with subsequent release
CC of free iron. {ECO:0000255|HAMAP-Rule:MF_01272}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=5 AH2 + 2 H(+) + heme b + 4 O2 = 5 A + delta-staphylobilin +
CC Fe(2+) + formaldehyde + 4 H2O; Xref=Rhea:RHEA:37039,
CC ChEBI:CHEBI:13193, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:15379, ChEBI:CHEBI:16842, ChEBI:CHEBI:17499,
CC ChEBI:CHEBI:29033, ChEBI:CHEBI:60344, ChEBI:CHEBI:74361;
CC EC=1.14.99.48; Evidence={ECO:0000255|HAMAP-Rule:MF_01272};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=5 AH2 + 2 H(+) + heme b + 4 O2 = 5 A + beta-staphylobilin +
CC Fe(2+) + formaldehyde + 4 H2O; Xref=Rhea:RHEA:37363,
CC ChEBI:CHEBI:13193, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:15379, ChEBI:CHEBI:16842, ChEBI:CHEBI:17499,
CC ChEBI:CHEBI:29033, ChEBI:CHEBI:60344, ChEBI:CHEBI:74362;
CC EC=1.14.99.48; Evidence={ECO:0000255|HAMAP-Rule:MF_01272};
CC -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_01272}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_01272}.
CC -!- SIMILARITY: Belongs to the antibiotic biosynthesis monooxygenase
CC family. Heme-degrading monooxygenase IsdG subfamily.
CC {ECO:0000255|HAMAP-Rule:MF_01272}.
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DR EMBL; CP000255; ABD22802.1; -; Genomic_DNA.
DR RefSeq; WP_000670950.1; NZ_CP027476.1.
DR AlphaFoldDB; Q2FHU5; -.
DR SMR; Q2FHU5; -.
DR EnsemblBacteria; ABD22802; ABD22802; SAUSA300_1035.
DR KEGG; saa:SAUSA300_1035; -.
DR HOGENOM; CLU_141544_2_1_9; -.
DR OMA; VTIMTTW; -.
DR Proteomes; UP000001939; Chromosome.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0020037; F:heme binding; IEA:UniProtKB-UniRule.
DR GO; GO:0004392; F:heme oxygenase (decyclizing) activity; IEA:UniProtKB-UniRule.
DR GO; GO:0005506; F:iron ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0042167; P:heme catabolic process; IEA:UniProtKB-UniRule.
DR GO; GO:0033212; P:iron import into cell; IEA:InterPro.
DR HAMAP; MF_01272; Heme_degrading_monooxygenase; 1.
DR InterPro; IPR007138; ABM_dom.
DR InterPro; IPR011008; Dimeric_a/b-barrel.
DR InterPro; IPR023953; IsdG.
DR Pfam; PF03992; ABM; 1.
DR SUPFAM; SSF54909; SSF54909; 1.
DR PROSITE; PS51725; ABM; 1.
PE 3: Inferred from homology;
KW Cytoplasm; Heme; Iron; Metal-binding; Monooxygenase; Oxidoreductase.
FT CHAIN 1..107
FT /note="Heme oxygenase (staphylobilin-producing) 1"
FT /id="PRO_0000270095"
FT DOMAIN 3..92
FT /note="ABM"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01272"
FT BINDING 7
FT /ligand="Fe cation"
FT /ligand_id="ChEBI:CHEBI:24875"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01272"
FT BINDING 22..29
FT /ligand="heme"
FT /ligand_id="ChEBI:CHEBI:30413"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01272"
FT BINDING 77
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_01272"
FT SITE 67
FT /note="Transition state stabilizer"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01272"
SQ SEQUENCE 107 AA; 12546 MW; DB13A134D5EC4FF0 CRC64;
MKFMAENRLT LTKGTAKDII ERFYTRHGIE TLEGFDGMFV TQTLEQEDFD EVKILTVWKS
KQAFTDWLKS DVFKAAHKHV RSKNEDESSP IINNKVITYD IGYSYMK
