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NRFA_ECOHS
ID   NRFA_ECOHS              Reviewed;         478 AA.
AC   A8A7H1;
DT   05-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   23-OCT-2007, sequence version 1.
DT   03-AUG-2022, entry version 84.
DE   RecName: Full=Cytochrome c-552 {ECO:0000255|HAMAP-Rule:MF_01182};
DE            EC=1.7.2.2 {ECO:0000255|HAMAP-Rule:MF_01182};
DE   AltName: Full=Ammonia-forming cytochrome c nitrite reductase {ECO:0000255|HAMAP-Rule:MF_01182};
DE            Short=Cytochrome c nitrite reductase {ECO:0000255|HAMAP-Rule:MF_01182};
DE   Flags: Precursor;
GN   Name=nrfA {ECO:0000255|HAMAP-Rule:MF_01182}; OrderedLocusNames=EcHS_A4315;
OS   Escherichia coli O9:H4 (strain HS).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Enterobacteriaceae; Escherichia.
OX   NCBI_TaxID=331112;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=HS;
RX   PubMed=18676672; DOI=10.1128/jb.00619-08;
RA   Rasko D.A., Rosovitz M.J., Myers G.S.A., Mongodin E.F., Fricke W.F.,
RA   Gajer P., Crabtree J., Sebaihia M., Thomson N.R., Chaudhuri R.,
RA   Henderson I.R., Sperandio V., Ravel J.;
RT   "The pangenome structure of Escherichia coli: comparative genomic analysis
RT   of E. coli commensal and pathogenic isolates.";
RL   J. Bacteriol. 190:6881-6893(2008).
CC   -!- FUNCTION: Catalyzes the reduction of nitrite to ammonia, consuming six
CC       electrons in the process. {ECO:0000255|HAMAP-Rule:MF_01182}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=6 Fe(III)-[cytochrome c] + 2 H2O + NH4(+) = 6 Fe(II)-
CC         [cytochrome c] + 8 H(+) + nitrite; Xref=Rhea:RHEA:13089, Rhea:RHEA-
CC         COMP:10350, Rhea:RHEA-COMP:14399, ChEBI:CHEBI:15377,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:16301, ChEBI:CHEBI:28938,
CC         ChEBI:CHEBI:29033, ChEBI:CHEBI:29034; EC=1.7.2.2;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01182};
CC   -!- COFACTOR:
CC       Name=Ca(2+); Xref=ChEBI:CHEBI:29108;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01182};
CC       Note=Binds 1 Ca(2+) ion per monomer. {ECO:0000255|HAMAP-Rule:MF_01182};
CC   -!- COFACTOR:
CC       Name=heme c; Xref=ChEBI:CHEBI:61717;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01182};
CC       Note=Binds 5 heme c groups covalently per monomer. {ECO:0000255|HAMAP-
CC       Rule:MF_01182};
CC   -!- PATHWAY: Nitrogen metabolism; nitrate reduction (assimilation).
CC       {ECO:0000255|HAMAP-Rule:MF_01182}.
CC   -!- SUBCELLULAR LOCATION: Periplasm {ECO:0000255|HAMAP-Rule:MF_01182}.
CC   -!- SIMILARITY: Belongs to the cytochrome c-552 family. {ECO:0000255|HAMAP-
CC       Rule:MF_01182}.
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DR   EMBL; CP000802; ABV08475.1; -; Genomic_DNA.
DR   RefSeq; WP_001365050.1; NC_009800.1.
DR   AlphaFoldDB; A8A7H1; -.
DR   SMR; A8A7H1; -.
DR   KEGG; ecx:EcHS_A4315; -.
DR   HOGENOM; CLU_035040_1_0_6; -.
DR   OMA; EMVILWA; -.
DR   UniPathway; UPA00653; -.
DR   Proteomes; UP000001123; Chromosome.
DR   GO; GO:0042597; C:periplasmic space; IEA:UniProtKB-SubCell.
DR   GO; GO:0005509; F:calcium ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0020037; F:heme binding; IEA:InterPro.
DR   GO; GO:0005506; F:iron ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0042279; F:nitrite reductase (cytochrome, ammonia-forming) activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0009061; P:anaerobic respiration; IEA:UniProt.
DR   GO; GO:0042128; P:nitrate assimilation; IEA:UniProtKB-UniPathway.
DR   CDD; cd00548; NrfA-like; 1.
DR   HAMAP; MF_01182; Cytochrom_C552; 1.
DR   InterPro; IPR003321; Cyt_c552.
DR   InterPro; IPR017570; Cyt_c_NO2Rdtase_formate-dep.
DR   InterPro; IPR036280; Multihaem_cyt_sf.
DR   PANTHER; PTHR30633; PTHR30633; 1.
DR   Pfam; PF02335; Cytochrom_C552; 1.
DR   PIRSF; PIRSF000243; Cyt_c552; 1.
DR   SUPFAM; SSF48695; SSF48695; 1.
DR   TIGRFAMs; TIGR03152; cyto_c552_HCOOH; 1.
DR   PROSITE; PS51008; MULTIHEME_CYTC; 1.
PE   3: Inferred from homology;
KW   Calcium; Electron transport; Heme; Iron; Metal-binding; Oxidoreductase;
KW   Periplasm; Signal; Transport.
FT   SIGNAL          1..26
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   CHAIN           27..478
FT                   /note="Cytochrome c-552"
FT                   /id="PRO_1000065802"
FT   BINDING         94
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /ligand_label="3"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         122
FT                   /ligand="heme"
FT                   /ligand_id="ChEBI:CHEBI:30413"
FT                   /ligand_label="1"
FT                   /note="covalent"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         125
FT                   /ligand="heme"
FT                   /ligand_id="ChEBI:CHEBI:30413"
FT                   /ligand_label="1"
FT                   /note="covalent"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         126
FT                   /ligand="heme"
FT                   /ligand_id="ChEBI:CHEBI:30413"
FT                   /ligand_label="1"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         160
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /ligand_label="2"
FT                   /note="covalent"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         163
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /ligand_label="2"
FT                   /note="covalent"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         164
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /ligand_label="2"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         209
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /ligand_label="3"
FT                   /note="covalent"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         212
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /ligand_label="3"
FT                   /note="covalent"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         213
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /ligand_label="3"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         215
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         216
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         216
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         261
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         263
FT                   /ligand="Ca(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29108"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         264
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         275
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /ligand_label="5"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         282
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /ligand_label="4"
FT                   /note="covalent"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         285
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /ligand_label="4"
FT                   /note="covalent"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         286
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /ligand_label="4"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         301
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /ligand_label="2"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         314
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /ligand_label="5"
FT                   /note="covalent"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         317
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /ligand_label="5"
FT                   /note="covalent"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         318
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /ligand_label="5"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
FT   BINDING         393
FT                   /ligand="heme c"
FT                   /ligand_id="ChEBI:CHEBI:61717"
FT                   /ligand_label="4"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01182"
SQ   SEQUENCE   478 AA;  53708 MW;  B02F5CE597EABFEE CRC64;
     MTRIKINARR IFSLLIPFFF FTSVHAEQTA APAKTVTVEA KNETFAPQHP DQYLSWKATS
     EQSERVDALA EDPRLVILWA GYPFSRDYNK PRGHAFAVTD VRETLRTGAP KNAEDGPLPM
     ACWSCKSPDV ARLIQKDGED GYFHGKWARG GPEIVNNLGC ADCHNTASPE FAKGKPELTL
     SRPYAARAME AIGKPFEKAG RFDQQSMVCG QCHVEYYFDG KNKAVKFPWD DGMKVENMEQ
     YYDKIAFSDW TNSLSKTPML KAQHPEYETW TAGIHGKNNV TCIDCHMPKV QNAEGKLYTD
     HKIGNPFDNF AQTCANCHTQ DKAALQKVVA ERKQSINDLK IKVEDQLVHA HFEAKAALDA
     GATEAEMKPI QDDIRHAQWR WDLAIASHGI HMHAPEEGLR MLGTAMDKAA DARTKLARLL
     ATKGITHEIE IPDISTKEKA QQAIGLNMEQ IKAEKQDFIK TVIPQWEEQA RKNGLLSQ
 
 
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