ID   HMP_SALPA               Reviewed;         396 AA.
AC   Q5PIH6;
DT   15-FEB-2005, integrated into UniProtKB/Swiss-Prot.
DT   04-JAN-2005, sequence version 1.
DT   02-SEP-2026, entry version 114.
DE   RecName: Full=Flavohemoprotein {ECO:0000255|HAMAP-Rule:MF_01252};
DE   AltName: Full=Flavohemoglobin {ECO:0000255|HAMAP-Rule:MF_01252};
DE   AltName: Full=Hemoglobin-like protein {ECO:0000255|HAMAP-Rule:MF_01252};
DE   AltName: Full=Nitric oxide dioxygenase {ECO:0000255|HAMAP-Rule:MF_01252};
DE            Short=NO oxygenase {ECO:0000255|HAMAP-Rule:MF_01252};
DE            Short=NOD {ECO:0000255|HAMAP-Rule:MF_01252};
DE            EC=1.14.12.17 {ECO:0000255|HAMAP-Rule:MF_01252};
GN   Name=hmp {ECO:0000255|HAMAP-Rule:MF_01252}; Synonyms=hmpA;
GN   OrderedLocusNames=SPA0310;
OS   Salmonella paratyphi A (strain ATCC 9150 / SARB42).
OC   Bacteria; Pseudomonadati; Pseudomonadota; Gammaproteobacteria;
OC   Enterobacterales; Enterobacteriaceae; Salmonella.
OX   NCBI_TaxID=295319;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 9150 / SARB42;
RX   PubMed=15531882; DOI=10.1038/ng1470;
RA   McClelland M., Sanderson K.E., Clifton S.W., Latreille P., Porwollik S.,
RA   Sabo A., Meyer R., Bieri T., Ozersky P., McLellan M., Harkins C.R.,
RA   Wang C., Nguyen C., Berghoff A., Elliott G., Kohlberg S., Strong C., Du F.,
RA   Carter J., Kremizki C., Layman D., Leonard S., Sun H., Fulton L., Nash W.,
RA   Miner T., Minx P., Delehaunty K., Fronick C., Magrini V., Nhan M.,
RA   Warren W., Florea L., Spieth J., Wilson R.K.;
RT   "Comparison of genome degradation in Paratyphi A and Typhi, human-
RT   restricted serovars of Salmonella enterica that cause typhoid.";
RL   Nat. Genet. 36:1268-1274(2004).
CC   -!- FUNCTION: Is involved in NO detoxification in an aerobic process,
CC       termed nitric oxide dioxygenase (NOD) reaction that utilizes O(2) and
CC       NAD(P)H to convert NO to nitrate, which protects the bacterium from
CC       various noxious nitrogen compounds. Therefore, plays a central role in
CC       the inducible response to nitrosative stress. {ECO:0000255|HAMAP-
CC       Rule:MF_01252}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=2 nitric oxide + NADPH + 2 O2 = 2 nitrate + NADP(+) + H(+);
CC         Xref=Rhea:RHEA:19465, ChEBI:CHEBI:15378, ChEBI:CHEBI:15379,
CC         ChEBI:CHEBI:16480, ChEBI:CHEBI:17632, ChEBI:CHEBI:57783,
CC         ChEBI:CHEBI:58349; EC=1.14.12.17; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01252};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=2 nitric oxide + NADH + 2 O2 = 2 nitrate + NAD(+) + H(+);
CC         Xref=Rhea:RHEA:19469, ChEBI:CHEBI:15378, ChEBI:CHEBI:15379,
CC         ChEBI:CHEBI:16480, ChEBI:CHEBI:17632, ChEBI:CHEBI:57540,
CC         ChEBI:CHEBI:57945; EC=1.14.12.17; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01252};
CC   -!- COFACTOR:
CC       Name=heme b; Xref=ChEBI:CHEBI:60344; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01252};
CC       Note=Binds 1 heme b (iron(II)-protoporphyrin IX) group per subunit.
CC       {ECO:0000255|HAMAP-Rule:MF_01252};
CC   -!- COFACTOR:
CC       Name=FAD; Xref=ChEBI:CHEBI:57692; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01252};
CC       Note=Binds 1 FAD per subunit. {ECO:0000255|HAMAP-Rule:MF_01252};
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250|UniProtKB:P24232}.
CC   -!- DOMAIN: Consists of two distinct domains; an N-terminal heme-containing
CC       oxygen-binding domain and a C-terminal reductase domain with binding
CC       sites for FAD and NAD(P)H.
CC   -!- SIMILARITY: Belongs to the globin family. Two-domain flavohemoproteins
CC       subfamily. {ECO:0000255|HAMAP-Rule:MF_01252}.
CC   -!- SIMILARITY: In the C-terminal section; belongs to the flavoprotein
CC       pyridine nucleotide cytochrome reductase family. {ECO:0000255|HAMAP-
CC       Rule:MF_01252}.
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DR   EMBL; CP000026; AAV76329.1; -; Genomic_DNA.
DR   RefSeq; WP_000883148.1; NC_006511.1.
DR   AlphaFoldDB; Q5PIH6; -.
DR   SMR; Q5PIH6; -.
DR   KEGG; spt:SPA0310; -.
DR   HOGENOM; CLU_003827_12_0_6; -.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0071949; F:FAD binding; IEA:InterPro.
DR   GO; GO:0020037; F:heme binding; IEA:InterPro.
DR   GO; GO:0008941; F:nitric oxide dioxygenase [NAD(P)H] activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0019825; F:oxygen binding; IEA:InterPro.
DR   GO; GO:0005344; F:oxygen carrier activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0071500; P:cellular response to nitrosative stress; IEA:TreeGrafter.
DR   GO; GO:0046210; P:nitric oxide catabolic process; IEA:TreeGrafter.
DR   CDD; cd06184; flavohem_like_fad_nad_binding; 1.
DR   CDD; cd14776; HmpEc-globin-like; 1.
DR   FunFam; 1.10.490.10:FF:000003; Flavohemoprotein; 1.
DR   FunFam; 2.40.30.10:FF:000034; Flavohemoprotein; 1.
DR   FunFam; 3.40.50.80:FF:000010; Flavohemoprotein; 1.
DR   Gene3D; 1.10.490.10; Globins; 1.
DR   Gene3D; 3.40.50.80; Nucleotide-binding domain of ferredoxin-NADP reductase (FNR) module; 1.
DR   Gene3D; 2.40.30.10; Translation factors; 1.
DR   HAMAP; MF_01252; Hmp; 1.
DR   InterPro; IPR008333; Cbr1-like_FAD-bd_dom.
DR   InterPro; IPR017927; FAD-bd_FR_type.
DR   InterPro; IPR039261; FNR_nucleotide-bd.
DR   InterPro; IPR000971; Globin.
DR   InterPro; IPR009050; Globin-like_sf.
DR   InterPro; IPR012292; Globin/Proto.
DR   InterPro; IPR023950; Hmp.
DR   InterPro; IPR001433; OxRdtase_FAD/NAD-bd.
DR   InterPro; IPR017938; Riboflavin_synthase-like_b-brl.
DR   NCBIfam; NF009805; PRK13289.1; 1.
DR   PANTHER; PTHR43396; FLAVOHEMOPROTEIN; 1.
DR   PANTHER; PTHR43396:SF3; FLAVOHEMOPROTEIN; 1.
DR   Pfam; PF00970; FAD_binding_6; 1.
DR   Pfam; PF00042; Globin; 1.
DR   Pfam; PF00175; NAD_binding_1; 1.
DR   PRINTS; PR00410; PHEHYDRXLASE.
DR   SUPFAM; SSF52343; Ferredoxin reductase-like, C-terminal NADP-linked domain; 1.
DR   SUPFAM; SSF46458; Globin-like; 1.
DR   SUPFAM; SSF63380; Riboflavin synthase domain-like; 1.
DR   PROSITE; PS51384; FAD_FR; 1.
DR   PROSITE; PS01033; GLOBIN; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Detoxification; FAD; Flavoprotein; Heme; Iron; Metal-binding;
KW   NAD; NADP; Oxidoreductase.
FT   CHAIN           1..396
FT                   /note="Flavohemoprotein"
FT                   /id="PRO_0000052445"
FT   DOMAIN          1..136
FT                   /note="Globin"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00238"
FT   DOMAIN          150..255
FT                   /note="FAD-binding FR-type"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01252"
FT   REGION          147..396
FT                   /note="Reductase"
FT   ACT_SITE        95
FT                   /note="Charge relay system"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01252"
FT   ACT_SITE        135
FT                   /note="Charge relay system"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01252"
FT   BINDING         44
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000250|UniProtKB:P39662"
FT   BINDING         44
FT                   /ligand="heme b"
FT                   /ligand_id="ChEBI:CHEBI:60344"
FT                   /evidence="ECO:0000250|UniProtKB:P24232"
FT   BINDING         46
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000250|UniProtKB:P24232"
FT   BINDING         50
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000250|UniProtKB:P24232"
FT   BINDING         53
FT                   /ligand="heme b"
FT                   /ligand_id="ChEBI:CHEBI:60344"
FT                   /evidence="ECO:0000250|UniProtKB:P24232"
FT   BINDING         84
FT                   /ligand="heme b"
FT                   /ligand_id="ChEBI:CHEBI:60344"
FT                   /evidence="ECO:0000250|UniProtKB:P24232"
FT   BINDING         85
FT                   /ligand="heme b"
FT                   /ligand_id="ChEBI:CHEBI:60344"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="proximal binding residue"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01252"
FT   BINDING         188
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01252"
FT   BINDING         204
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000250|UniProtKB:P24232"
FT   BINDING         205
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000250|UniProtKB:P24232"
FT   BINDING         206
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000250|UniProtKB:P24232"
FT   BINDING         207
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000250|UniProtKB:P24232"
FT   BINDING         220
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000250|UniProtKB:P24232"
FT   BINDING         222
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000250|UniProtKB:P24232"
FT   BINDING         224
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000250|UniProtKB:P39662"
FT   BINDING         225
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000250|UniProtKB:P24232"
FT   BINDING         228
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000250|UniProtKB:P24232"
FT   BINDING         229
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000250|UniProtKB:P24232"
FT   BINDING         230
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000250|UniProtKB:P24232"
FT   BINDING         268..273
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01252"
FT   BINDING         272
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000250|UniProtKB:P24232"
FT   BINDING         389..392
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01252"
FT   BINDING         393
FT                   /ligand="heme b"
FT                   /ligand_id="ChEBI:CHEBI:60344"
FT                   /evidence="ECO:0000250|UniProtKB:P24232"
FT   SITE            29
FT                   /note="Involved in heme-bound ligand stabilization and O-O
FT                   bond activation"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01252"
FT   SITE            84
FT                   /note="Influences the redox potential of the prosthetic
FT                   heme and FAD groups"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01252"
FT   SITE            388
FT                   /note="Influences the redox potential of the prosthetic
FT                   heme and FAD groups"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01252"
SQ   SEQUENCE   396 AA;  44004 MW;  9E3B8FD3855FFEBF CRC64;
     MLDAQTIATV KATIPLLVET GPKLTAHFYD RMFTHNPELK EIFNMSNQRN GDQREALFNA
     IAAYASNIEN LPALLPAVEK IAQKHTSFQI KPEQYNIVGT HLLATLDEMF NPGQEVLDAW
     GKAYGVLANV FIHREAEIYH ENASKDGGWE GTRPFRIVAK TPRSALITSF EFEPVDGGTV
     AEYRPGQYLG VWLKPEGFAH QEIRQYSLTR KPDGKGYRIA VKREDGGQVS NWLHHHASVG
     DVVHLAAPAG DFFMNVAADT PVSLISAGVG QTPMLAMLDT LAKEQHTAQV NWFHAAENGD
     VHAFADEVSE LGRTLPRFTA HTWYREPTEA DRAQRVFDSE GLMDLSQLEA AISDPAMQFY
     LCGPVGFMQF AAKQLVSLGV NNENIHYECF GPHKVL
//