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NIFH_ACIF2
ID   NIFH_ACIF2              Reviewed;         296 AA.
AC   B7JA99;
DT   22-SEP-2009, integrated into UniProtKB/Swiss-Prot.
DT   10-FEB-2009, sequence version 1.
DT   03-AUG-2022, entry version 69.
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=AFE_1522;
OS   Acidithiobacillus ferrooxidans (strain ATCC 23270 / DSM 14882 / CIP 104768
OS   / NCIMB 8455) (Ferrobacillus ferrooxidans (strain ATCC 23270)).
OC   Bacteria; Proteobacteria; Acidithiobacillia; Acidithiobacillales;
OC   Acidithiobacillaceae; Acidithiobacillus.
OX   NCBI_TaxID=243159;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 23270 / DSM 14882 / CIP 104768 / NCIMB 8455;
RX   PubMed=19077236; DOI=10.1186/1471-2164-9-597;
RA   Valdes J., Pedroso I., Quatrini R., Dodson R.J., Tettelin H., Blake R. II,
RA   Eisen J.A., Holmes D.S.;
RT   "Acidithiobacillus ferrooxidans metabolism: from genome sequence to
RT   industrial applications.";
RL   BMC Genomics 9:597-597(2008).
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-103 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; CP001219; ACK79918.1; -; Genomic_DNA.
DR   RefSeq; WP_009567494.1; NC_011761.1.
DR   AlphaFoldDB; B7JA99; -.
DR   SMR; B7JA99; -.
DR   STRING; 243159.AFE_1522; -.
DR   PaxDb; B7JA99; -.
DR   EnsemblBacteria; ACK79918; ACK79918; AFE_1522.
DR   GeneID; 66432510; -.
DR   KEGG; afr:AFE_1522; -.
DR   eggNOG; COG1348; Bacteria.
DR   HOGENOM; CLU_059373_0_0_6; -.
DR   OMA; YVCDYYL; -.
DR   OrthoDB; 729012at2; -.
DR   Proteomes; UP000001362; 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..296
FT                   /note="Nitrogenase iron protein"
FT                   /id="PRO_1000211850"
FT   BINDING         12..19
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00533"
FT   BINDING         100
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         134
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         103
FT                   /note="ADP-ribosylarginine; by dinitrogenase reductase ADP-
FT                   ribosyltransferase"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00533"
SQ   SEQUENCE   296 AA;  31745 MW;  E31023858BF99105 CRC64;
     MSDKLRQIAF YGKGGIGKST TSQNTLAALT EMGQKILIVG CDPKADSTRL ILHSKAQDTV
     LSLAAEAGSV EDLEIEDVMK VGYRDIRCVE SGGPEPGVGC AGRGVITSIN FLEENGAYDG
     VDYVSYDVLG DVVCGGFAMP IRENKAQEIY IVMSGEMMAM YAANNISKGI LKYANSGGVR
     LGGLVCNERQ TDKELELAEA LAGKLGTKLI HFVPRDNIVQ HAELRRMTVL EYAPESKQAE
     EYRQLAQKIH ANGGNGTIPT PITMDELEEM LMEFGIMSAV DESVIGKSAA ELAAAV
 
 
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