ID A0A0E4HE97_9BACL Unreviewed; 519 AA.
AC A0A0E4HE97;
DT 24-JUN-2015, integrated into UniProtKB/TrEMBL.
DT 24-JUN-2015, sequence version 1.
DT 24-JAN-2024, entry version 39.
DE RecName: Full=Nitrogenase molybdenum-iron protein beta chain {ECO:0000256|ARBA:ARBA00014775, ECO:0000256|RuleBase:RU364127};
DE EC=1.18.6.1 {ECO:0000256|ARBA:ARBA00012773, ECO:0000256|RuleBase:RU364127};
DE AltName: Full=Dinitrogenase {ECO:0000256|RuleBase:RU364127};
GN Name=nifK {ECO:0000313|EMBL:CQR57925.1};
GN ORFNames=PRIO_5538 {ECO:0000313|EMBL:CQR57925.1};
OS Paenibacillus riograndensis SBR5.
OC Bacteria; Bacillota; Bacilli; Bacillales; Paenibacillaceae; Paenibacillus;
OC Paenibacillus sonchi group.
OX NCBI_TaxID=1073571 {ECO:0000313|EMBL:CQR57925.1, ECO:0000313|Proteomes:UP000033163};
RN [1] {ECO:0000313|Proteomes:UP000033163}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RA Wibberg D.;
RL Submitted (MAR-2015) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: This molybdenum-iron protein is part of the nitrogenase
CC complex that catalyzes the key enzymatic reactions in nitrogen
CC fixation. {ECO:0000256|ARBA:ARBA00002621,
CC ECO:0000256|RuleBase:RU364127}.
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 ECO:0000256|RuleBase:RU364127};
CC -!- COFACTOR:
CC Name=[8Fe-7S] cluster; Xref=ChEBI:CHEBI:21143;
CC Evidence={ECO:0000256|RuleBase:RU364127};
CC Note=Binds 1 [8Fe-7S] cluster per heterodimer.
CC {ECO:0000256|RuleBase:RU364127};
CC -!- SUBUNIT: Tetramer of two alpha and two beta chains. Forms complex with
CC the iron protein (nitrogenase component 2).
CC {ECO:0000256|ARBA:ARBA00011462, ECO:0000256|RuleBase:RU364127}.
CC -!- SIMILARITY: Belongs to the NifD/NifK/NifE/NifN family.
CC {ECO:0000256|ARBA:ARBA00011002, ECO:0000256|RuleBase:RU004021}.
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DR EMBL; LN831776; CQR57925.1; -; Genomic_DNA.
DR RefSeq; WP_020426654.1; NZ_LN831776.1.
DR AlphaFoldDB; A0A0E4HE97; -.
DR STRING; 483937.AMQ84_18350; -.
DR KEGG; pri:PRIO_5538; -.
DR PATRIC; fig|1073571.4.peg.5938; -.
DR HOGENOM; CLU_025876_2_0_9; -.
DR Proteomes; UP000033163; Chromosome I.
DR GO; GO:0016612; C:molybdenum-iron nitrogenase complex; IEA:InterPro.
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 Gene3D; 3.40.50.1980; Nitrogenase molybdenum iron protein domain; 3.
DR Gene3D; 1.20.89.10; Nitrogenase Molybdenum-iron Protein, subunit B, domain 4; 1.
DR InterPro; IPR000510; Nase/OxRdtase_comp1.
DR InterPro; IPR000318; Nase_comp1_CS.
DR InterPro; IPR005976; Nase_Mo-Fe_CF_bsu.
DR InterPro; IPR024564; Nase_Mo-Fe_CF_bsu_N.
DR NCBIfam; TIGR01286; nifK; 1.
DR PANTHER; PTHR33712; LIGHT-INDEPENDENT PROTOCHLOROPHYLLIDE REDUCTASE SUBUNIT B; 1.
DR PANTHER; PTHR33712:SF7; LIGHT-INDEPENDENT PROTOCHLOROPHYLLIDE REDUCTASE SUBUNIT B; 1.
DR Pfam; PF11844; DUF3364; 1.
DR Pfam; PF00148; Oxidored_nitro; 1.
DR SUPFAM; SSF53807; Helical backbone' metal receptor; 1.
DR PROSITE; PS00699; NITROGENASE_1_1; 1.
DR PROSITE; PS00090; NITROGENASE_1_2; 1.
PE 3: Inferred from homology;
KW ATP-binding {ECO:0000256|RuleBase:RU364127};
KW Iron {ECO:0000256|RuleBase:RU364127};
KW Iron-sulfur {ECO:0000256|RuleBase:RU364127};
KW Metal-binding {ECO:0000256|RuleBase:RU364127};
KW Nitrogen fixation {ECO:0000256|ARBA:ARBA00023231,
KW ECO:0000256|RuleBase:RU004021};
KW Nucleotide-binding {ECO:0000256|RuleBase:RU364127};
KW Oxidoreductase {ECO:0000256|RuleBase:RU364127,
KW ECO:0000313|EMBL:CQR57925.1}.
FT DOMAIN 4..55
FT /note="Nitrogenase molybdenum-iron protein beta chain N-
FT terminal"
FT /evidence="ECO:0000259|Pfam:PF11844"
FT DOMAIN 69..502
FT /note="Nitrogenase/oxidoreductase component 1"
FT /evidence="ECO:0000259|Pfam:PF00148"
SQ SEQUENCE 519 AA; 56852 MW; E39E1BB84F2810E8 CRC64;
MSRDRLEIPD YNSLFSEERY VQQRANKKQF EAPCSEQDTA EALAYSKSAE YMQKNFDRKA
VVINPHKACQ PLGSVMAALG FEKTLPFVHG SQGCNSYFRS HLSRHFKEPT PAVSSSMTED
AAVFGGMNNL IDGLENSIAL YKPEMIALCT TCMAEVIGDD LSSFIGNARI KGAITEDFPV
AFCNTPSFVG SHITGYDSML KGILSYLYER SGVQANPGSG EEAGEKLNVM LGFEPYTGNF
AEIRKILEAF DTKYTLLGDH SGNYDSPATG EYEYYYGGTK LADVPLAANA LGTLSLQKYT
LKKTQDFISG TWNQQLTALS TPLGITGTDK LLDAVSELTG LPVPASLMEE RGRVVDALTD
SHPYLHGKRV ALVGDPDLLI GLIGFCLEIG MEPVHIVCSN GDVDFNEVKF KDEAEALLAS
SPYGSEAALY IGNDLWHMRS LLINDPVDLA IGSSHLKFAA KDAGVPLVRV GFPILDRHHM
HRYPIIGYQG TLNLLSLLVN TVLDELDRNN SGFNYDLVR
//