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NRFA_SALNS
ID   NRFA_SALNS              Reviewed;         478 AA.
AC   B4T1X2;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   23-SEP-2008, sequence version 1.
DT   03-AUG-2022, entry version 71.
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};
GN   OrderedLocusNames=SNSL254_A4622;
OS   Salmonella newport (strain SL254).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Enterobacteriaceae; Salmonella.
OX   NCBI_TaxID=423368;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=SL254;
RX   PubMed=21602358; DOI=10.1128/jb.00297-11;
RA   Fricke W.F., Mammel M.K., McDermott P.F., Tartera C., White D.G.,
RA   Leclerc J.E., Ravel J., Cebula T.A.;
RT   "Comparative genomics of 28 Salmonella enterica isolates: evidence for
RT   CRISPR-mediated adaptive sublineage evolution.";
RL   J. Bacteriol. 193:3556-3568(2011).
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; CP001113; ACF62061.1; -; Genomic_DNA.
DR   RefSeq; WP_000101770.1; NZ_CCMR01000003.1.
DR   AlphaFoldDB; B4T1X2; -.
DR   SMR; B4T1X2; -.
DR   EnsemblBacteria; ACF62061; ACF62061; SNSL254_A4622.
DR   KEGG; see:SNSL254_A4622; -.
DR   HOGENOM; CLU_035040_1_0_6; -.
DR   OMA; EMVILWA; -.
DR   UniPathway; UPA00653; -.
DR   Proteomes; UP000008824; 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_1000138220"
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;  53787 MW;  0AD7521E66215571 CRC64;
     MARKTLRARR FFSLIFPFFF ITSVYAEQTP ESAKTVTVEA KNEMFAPQHP DQYQSWKATS
     EQSAREDALA EDPRLVILWA GYPFSRDYNK PRGHAYAVTD VRETLRTGAP KTAEDGPLPM
     ACWSCKSPDV ARLIQQEGED GYFHGKWARG GPEIVNDLGC ADCHNTASDD FAQGKPALTL
     SRPYAERAME AIGKPFDKAG RFDQQSMVCG QCHVEYYFDG KNKAVKFPWD EGMKVENMEQ
     YYDAIAFSDW TNSLSKTPML KAQHPEYETW SAGIHGKNNV TCIDCHMPKV QNAEGKLYTD
     HKIGNPFDNF AQTCANCHTQ DKASLQKVVA ERKQAIHDLK IKVEDQLVHA HFEAKAAWDA
     GATDAEMKPI LNDIRHAQWR WDLAIASHGI HMHAPEEGLR MLGSAMDKAA DARTKLARLL
     ATKGITHEIP LPDISTKEKA QKAIGLNMQQ INAEKQDFLK TVVPQWEDQA RKNGLLSQ
 
 
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