ID A0A139X2E2_9CYAN Unreviewed; 56 AA.
AC A0A139X2E2;
DT 11-MAY-2016, integrated into UniProtKB/TrEMBL.
DT 11-MAY-2016, sequence version 1.
DT 27-MAR-2024, entry version 30.
DE RecName: Full=nitrogenase {ECO:0000256|ARBA:ARBA00012773};
DE EC=1.18.6.1 {ECO:0000256|ARBA:ARBA00012773};
GN ORFNames=WA1_34895 {ECO:0000313|EMBL:KYC38792.1};
OS Scytonema hofmannii PCC 7110.
OC Bacteria; Cyanobacteriota; Cyanophyceae; Nostocales; Scytonemataceae;
OC Scytonema.
OX NCBI_TaxID=128403 {ECO:0000313|EMBL:KYC38792.1, ECO:0000313|Proteomes:UP000076925};
RN [1] {ECO:0000313|EMBL:KYC38792.1, ECO:0000313|Proteomes:UP000076925}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=PCC 7110 {ECO:0000313|EMBL:KYC38792.1,
RC ECO:0000313|Proteomes:UP000076925};
RX PubMed=23221676; DOI=10.1093/gbe/evs117;
RA Dagan T., Roettger M., Stucken K., Landan G., Koch R., Major P.,
RA Gould S.B., Goremykin V.V., Rippka R., Tandeau de Marsac N., Gugger M.,
RA Lockhart P.J., Allen J.F., Brune I., Maus I., Puhler A., Martin W.F.;
RT "Genomes of Stigonematalean cyanobacteria (subsection V) and the evolution
RT of oxygenic photosynthesis from prokaryotes to plastids.";
RL Genome Biol. Evol. 5:31-44(2013).
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.
CC {ECO:0000256|ARBA:ARBA00002234}.
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 Evidence={ECO:0000256|ARBA:ARBA00000805};
CC -!- COFACTOR:
CC Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883;
CC Evidence={ECO:0000256|ARBA:ARBA00001966};
CC -!- SUBUNIT: Homodimer. {ECO:0000256|ARBA:ARBA00011738}.
CC -!- SIMILARITY: Belongs to the NifH/BchL/ChlL family.
CC {ECO:0000256|ARBA:ARBA00005504}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:KYC38792.1}.
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DR EMBL; ANNX02000038; KYC38792.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A139X2E2; -.
DR STRING; 128403.WA1_34895; -.
DR Proteomes; UP000076925; Unassembled WGS sequence.
DR GO; GO:0051539; F:4 iron, 4 sulfur cluster binding; IEA:UniProtKB-KW.
DR GO; GO:0005524; F:ATP binding; IEA:UniProtKB-KW.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0016491; F:oxidoreductase activity; IEA:InterPro.
DR Gene3D; 3.40.50.300; P-loop containing nucleotide triphosphate hydrolases; 1.
DR InterPro; IPR000392; NifH/frxC.
DR InterPro; IPR027417; P-loop_NTPase.
DR PANTHER; PTHR42864; LIGHT-INDEPENDENT PROTOCHLOROPHYLLIDE REDUCTASE IRON-SULFUR ATP-BINDING PROTEIN; 1.
DR PANTHER; PTHR42864:SF2; LIGHT-INDEPENDENT PROTOCHLOROPHYLLIDE REDUCTASE IRON-SULFUR ATP-BINDING PROTEIN; 1.
DR Pfam; PF00142; Fer4_NifH; 1.
DR PRINTS; PR00091; NITROGNASEII.
DR SUPFAM; SSF52540; P-loop containing nucleoside triphosphate hydrolases; 1.
DR PROSITE; PS51026; NIFH_FRXC_3; 1.
PE 3: Inferred from homology;
KW 4Fe-4S {ECO:0000256|ARBA:ARBA00022485};
KW ATP-binding {ECO:0000256|ARBA:ARBA00022840};
KW Iron {ECO:0000256|ARBA:ARBA00023004};
KW Iron-sulfur {ECO:0000256|ARBA:ARBA00023014};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741};
KW Reference proteome {ECO:0000313|Proteomes:UP000076925}.
SQ SEQUENCE 56 AA; 6080 MW; 632B7686A512F4E7 CRC64;
MSDEKIRQIA FYGKGGIGKS TTSQNTLAAM AEMGQRIMIV GCDPKADSCS FYKKNT
//
