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NIFH_PROA2
ID   NIFH_PROA2              Reviewed;         274 AA.
AC   B4S9H5;
DT   22-SEP-2009, integrated into UniProtKB/Swiss-Prot.
DT   23-SEP-2008, sequence version 1.
DT   03-AUG-2022, entry version 78.
DE   RecName: Full=Nitrogenase iron protein {ECO:0000255|HAMAP-Rule:MF_00533};
DE            EC=1.18.6.1 {ECO:0000255|HAMAP-Rule:MF_00533};
DE   AltName: Full=Nitrogenase Fe protein {ECO:0000255|HAMAP-Rule:MF_00533};
DE   AltName: Full=Nitrogenase component II {ECO:0000255|HAMAP-Rule:MF_00533};
DE   AltName: Full=Nitrogenase reductase {ECO:0000255|HAMAP-Rule:MF_00533};
GN   Name=nifH {ECO:0000255|HAMAP-Rule:MF_00533}; OrderedLocusNames=Paes_1627;
OS   Prosthecochloris aestuarii (strain DSM 271 / SK 413).
OC   Bacteria; Chlorobi; Chlorobia; Chlorobiales; Chlorobiaceae;
OC   Prosthecochloris.
OX   NCBI_TaxID=290512;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 271 / SK 413;
RG   US DOE Joint Genome Institute;
RA   Lucas S., Copeland A., Lapidus A., Glavina del Rio T., Dalin E., Tice H.,
RA   Bruce D., Goodwin L., Pitluck S., Schmutz J., Larimer F., Land M.,
RA   Hauser L., Kyrpides N., Anderson I., Liu Z., Li T., Zhao F., Overmann J.,
RA   Bryant D.A., Richardson P.;
RT   "Complete sequence of chromosome of Prosthecochloris aestuarii DSM 271.";
RL   Submitted (JUN-2008) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: The key enzymatic reactions in nitrogen fixation are
CC       catalyzed by the nitrogenase complex, which has 2 components: the iron
CC       protein and the molybdenum-iron protein. {ECO:0000255|HAMAP-
CC       Rule:MF_00533}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=16 ATP + 16 H2O + N2 + 8 reduced [2Fe-2S]-[ferredoxin] = 16
CC         ADP + 6 H(+) + H2 + 2 NH4(+) + 8 oxidized [2Fe-2S]-[ferredoxin] + 16
CC         phosphate; Xref=Rhea:RHEA:21448, Rhea:RHEA-COMP:10000, Rhea:RHEA-
CC         COMP:10001, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:17997,
CC         ChEBI:CHEBI:18276, ChEBI:CHEBI:28938, ChEBI:CHEBI:30616,
CC         ChEBI:CHEBI:33737, ChEBI:CHEBI:33738, ChEBI:CHEBI:43474,
CC         ChEBI:CHEBI:456216; EC=1.18.6.1; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00533};
CC   -!- COFACTOR:
CC       Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00533};
CC       Note=Binds 1 [4Fe-4S] cluster per dimer. {ECO:0000255|HAMAP-
CC       Rule:MF_00533};
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_00533}.
CC   -!- PTM: The reversible ADP-ribosylation of Arg-97 inactivates the
CC       nitrogenase reductase and regulates nitrogenase activity.
CC       {ECO:0000255|HAMAP-Rule:MF_00533}.
CC   -!- SIMILARITY: Belongs to the NifH/BchL/ChlL family. {ECO:0000255|HAMAP-
CC       Rule:MF_00533}.
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DR   EMBL; CP001108; ACF46645.1; -; Genomic_DNA.
DR   RefSeq; WP_012506178.1; NC_011059.1.
DR   AlphaFoldDB; B4S9H5; -.
DR   SMR; B4S9H5; -.
DR   STRING; 290512.Paes_1627; -.
DR   EnsemblBacteria; ACF46645; ACF46645; Paes_1627.
DR   KEGG; paa:Paes_1627; -.
DR   eggNOG; COG1348; Bacteria.
DR   HOGENOM; CLU_059373_0_0_10; -.
DR   OMA; YVCDYYL; -.
DR   OrthoDB; 729012at2; -.
DR   Proteomes; UP000002725; Chromosome.
DR   GO; GO:0051539; F:4 iron, 4 sulfur cluster binding; IEA:UniProtKB-KW.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0018697; F:carbonyl sulfide nitrogenase activity; IEA:UniProtKB-EC.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0016163; F:nitrogenase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0009399; P:nitrogen fixation; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.40.50.300; -; 1.
DR   HAMAP; MF_00533; NifH; 1.
DR   InterPro; IPR030655; NifH/chlL_CS.
DR   InterPro; IPR000392; NifH/frxC.
DR   InterPro; IPR005977; Nitrogenase_Fe_NifH.
DR   InterPro; IPR027417; P-loop_NTPase.
DR   PANTHER; PTHR42864; PTHR42864; 1.
DR   Pfam; PF00142; Fer4_NifH; 1.
DR   PIRSF; PIRSF000363; Nitrogenase_iron; 1.
DR   SUPFAM; SSF52540; SSF52540; 1.
DR   TIGRFAMs; TIGR01287; nifH; 1.
DR   PROSITE; PS00746; NIFH_FRXC_1; 1.
DR   PROSITE; PS00692; NIFH_FRXC_2; 1.
DR   PROSITE; PS51026; NIFH_FRXC_3; 1.
PE   3: Inferred from homology;
KW   4Fe-4S; ADP-ribosylation; ATP-binding; Iron; Iron-sulfur; Metal-binding;
KW   Nitrogen fixation; Nucleotide-binding; Oxidoreductase; Reference proteome.
FT   CHAIN           1..274
FT                   /note="Nitrogenase iron protein"
FT                   /id="PRO_1000211880"
FT   BINDING         8..15
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00533"
FT   BINDING         94
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /ligand_note="ligand shared between dimeric partners"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00533"
FT   BINDING         131
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /ligand_note="ligand shared between dimeric partners"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00533"
FT   MOD_RES         97
FT                   /note="ADP-ribosylarginine; by dinitrogenase reductase ADP-
FT                   ribosyltransferase"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00533"
SQ   SEQUENCE   274 AA;  29919 MW;  BC48B23433CAFF78 CRC64;
     MRKIAIYGKG GIGKSTTTQN TVAGLAEMGN KVMVVGCDPK ADSTRLLLGG LTQKTVLDTL
     REEGEDVELE DIIKEGYGAS RCTESGGPEP GVGCAGRGII TSVNLLEQLG AYDDEWGLDY
     VFYDVLGDVV CGGFAMPIRD GKAQEIYIVV SGEMMAMYAA NNICKGILKY ADAGGVRLGG
     LICNSRKVDN EREMIEELAR QLGTQMIHFV PRDNMVQRAE INRKTVIDFD PSHNQADEYR
     ALATKIDQNE MFVIPKPLEI EELEKLLIDF GIAN
 
 
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