HDOX_ALKHC
ID HDOX_ALKHC Reviewed; 116 AA.
AC Q9K7R6;
DT 09-JAN-2007, integrated into UniProtKB/Swiss-Prot.
DT 01-OCT-2000, sequence version 1.
DT 03-AUG-2022, entry version 104.
DE RecName: Full=Heme-degrading monooxygenase {ECO:0000255|HAMAP-Rule:MF_01272};
DE EC=1.14.14.18 {ECO:0000255|HAMAP-Rule:MF_01272};
DE AltName: Full=Heme oxygenase {ECO:0000255|HAMAP-Rule:MF_01272};
DE AltName: Full=Iron-regulated surface determinant {ECO:0000255|HAMAP-Rule:MF_01272};
DE AltName: Full=Iron-responsive surface determinant {ECO:0000255|HAMAP-Rule:MF_01272};
GN Name=isdG {ECO:0000255|HAMAP-Rule:MF_01272}; OrderedLocusNames=BH3293;
OS Alkalihalobacillus halodurans (strain ATCC BAA-125 / DSM 18197 / FERM 7344
OS / JCM 9153 / C-125) (Bacillus halodurans).
OC Bacteria; Firmicutes; Bacilli; Bacillales; Bacillaceae; Alkalihalobacillus.
OX NCBI_TaxID=272558;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC BAA-125 / DSM 18197 / FERM 7344 / JCM 9153 / C-125;
RX PubMed=11058132; DOI=10.1093/nar/28.21.4317;
RA Takami H., Nakasone K., Takaki Y., Maeno G., Sasaki R., Masui N., Fuji F.,
RA Hirama C., Nakamura Y., Ogasawara N., Kuhara S., Horikoshi K.;
RT "Complete genome sequence of the alkaliphilic bacterium Bacillus halodurans
RT and genomic sequence comparison with Bacillus subtilis.";
RL Nucleic Acids Res. 28:4317-4331(2000).
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 biliverdin in the presence of a suitable electron
CC donor such as ascorbate or NADPH--cytochrome P450 reductase, with
CC subsequent release of free iron. {ECO:0000255|HAMAP-Rule:MF_01272}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=heme b + 3 O2 + 3 reduced [NADPH--hemoprotein reductase] =
CC biliverdin IXalpha + CO + Fe(2+) + H(+) + 3 H2O + 3 oxidized [NADPH--
CC hemoprotein reductase]; Xref=Rhea:RHEA:21764, Rhea:RHEA-COMP:11964,
CC Rhea:RHEA-COMP:11965, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:15379, ChEBI:CHEBI:17245, ChEBI:CHEBI:29033,
CC ChEBI:CHEBI:57618, ChEBI:CHEBI:57991, ChEBI:CHEBI:58210,
CC ChEBI:CHEBI:60344; EC=1.14.14.18; Evidence={ECO:0000255|HAMAP-
CC 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; BA000004; BAB07012.1; -; Genomic_DNA.
DR PIR; E84061; E84061.
DR RefSeq; WP_010899434.1; NC_002570.2.
DR AlphaFoldDB; Q9K7R6; -.
DR SMR; Q9K7R6; -.
DR STRING; 272558.10175916; -.
DR EnsemblBacteria; BAB07012; BAB07012; BAB07012.
DR KEGG; bha:BH3293; -.
DR eggNOG; COG2329; Bacteria.
DR HOGENOM; CLU_141544_2_1_9; -.
DR OMA; FRESHSH; -.
DR OrthoDB; 1562645at2; -.
DR Proteomes; UP000001258; 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;
KW Reference proteome.
FT CHAIN 1..116
FT /note="Heme-degrading monooxygenase"
FT /id="PRO_0000270075"
FT DOMAIN 2..92
FT /note="ABM"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01272"
FT BINDING 6
FT /ligand="Fe cation"
FT /ligand_id="ChEBI:CHEBI:24875"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01272"
FT BINDING 76
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 66
FT /note="Transition state stabilizer"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01272"
SQ SEQUENCE 116 AA; 13175 MW; 87F6CFB28A691023 CRC64;
MVIVTNTSKI TKGNGEKLIE RFNKVGKVEF MEGFLGLEVL LTENTKDFDE VTVVTRWNTK
DDFKNWTKSS AFRDAHSKRE VPEYILENKI SFYEVKVVRG PLTAAEAGND SQAQAQ
