ID   VNFG_AZOSA              Reviewed;         113 AA.
AC   O68951;
DT   15-JUL-1999, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 3.
DT   25-MAY-2022, entry version 60.
DE   RecName: Full=Nitrogenase vanadium-iron protein delta chain;
DE            EC=1.18.6.1;
DE   AltName: Full=Dinitrogenase 2 subunit delta;
DE   AltName: Full=Nitrogenase component I;
GN   Name=vnfG;
OS   Azotobacter salinestris.
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Pseudomonadales;
OC   Pseudomonadaceae; Azotobacter.
OX   NCBI_TaxID=69964;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=10420583; DOI=10.1139/w99-007;
RA   Loveless T.M., Bishop P.E.;
RT   "Identification of genes unique to Mo-independent nitrogenase systems in
RT   diverse diazotrophs.";
RL   Can. J. Microbiol. 45:312-317(1999).
CC   -!- FUNCTION: The key enzymatic reactions in nitrogen fixation are
CC       catalyzed by the nitrogenase complex, which has 2 components: the iron
CC       protein (component 2) and a component 1 which is either a molybdenum-
CC       iron protein, a vanadium-iron, or an iron-iron protein.
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;
CC   -!- COFACTOR:
CC       Name=iron-sulfur cluster; Xref=ChEBI:CHEBI:30408;
CC         Evidence={ECO:0000250};
CC   -!- COFACTOR:
CC       Name=vanadium cation; Xref=ChEBI:CHEBI:35172; Evidence={ECO:0000250};
CC   -!- SUBUNIT: Hexamer of two alpha, two beta, and two delta chains.
CC       {ECO:0000250}.
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DR   EMBL; AF058782; AAC14338.1; -; Genomic_DNA.
DR   AlphaFoldDB; O68951; -.
DR   SMR; O68951; -.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
DR   GO; GO:0018697; F:carbonyl sulfide nitrogenase activity; IEA:UniProtKB-EC.
DR   GO; GO:0051536; F:iron-sulfur cluster binding; IEA:UniProtKB-KW.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0016163; F:nitrogenase activity; IEA:UniProtKB-EC.
DR   GO; GO:0009399; P:nitrogen fixation; IEA:UniProtKB-KW.
DR   InterPro; IPR014279; Nase_V-Fe_dsu.
DR   InterPro; IPR004349; V/Nase_d_su.
DR   Pfam; PF03139; AnfG_VnfG; 1.
DR   TIGRFAMs; TIGR02930; vnfG_nitrog; 1.
PE   3: Inferred from homology;
KW   ATP-binding; Iron; Iron-sulfur; Metal-binding; Nitrogen fixation;
KW   Nucleotide-binding; Oxidoreductase; Vanadium.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000250"
FT   CHAIN           2..113
FT                   /note="Nitrogenase vanadium-iron protein delta chain"
FT                   /id="PRO_0000213562"
SQ   SEQUENCE   113 AA;  13379 MW;  54CA0E379EC01924 CRC64;
     MSQSRLDDLF AYVEERCLWQ FFSRTWDREE NIEGVLNQVC RLLTGQEPLR GTPQERLFYA
     DALAMANDVR ERFPWASQVN KEEIAFLIDG LKSRLVDVTI TRSTNRELNH HLY