ID   FLAV_AZOCH              Reviewed;         180 AA.
AC   P23001; P35708;
DT   01-AUG-1991, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 3.
DT   03-AUG-2022, entry version 86.
DE   RecName: Full=Flavodoxin B;
DE            Short=FldB;
GN   Name=nifF;
OS   Azotobacter chroococcum mcd 1.
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Pseudomonadales;
OC   Pseudomonadaceae; Azotobacter.
OX   NCBI_TaxID=355;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=8765738; DOI=10.1007/bf00200433;
RA   Peelen S., Wijmenga S., Erbel P.J., Robson R.L., Eady R.R., Vervoort J.;
RT   "Possible role of a short extra loop of the long-chain flavodoxin from
RT   Azotobacter chroococcum in electron transfer to nitrogenase: complete 1H,
RT   15N and 13C backbone assignments and secondary solution structure of the
RT   flavodoxin.";
RL   J. Biomol. NMR 7:315-330(1996).
RN   [2]
RP   PROTEIN SEQUENCE OF 2-21.
RC   STRAIN=MCD 1155;
RX   PubMed=1859358; DOI=10.1042/bj2770313;
RA   Bagby S., Barker P.D., Hill H.A.O., Sanghera G.S., Dunbar B., Ashby G.A.,
RA   Eady R.R., Thorneley R.N.F.;
RT   "Direct electrochemistry of two genetically distinct flavodoxins isolated
RT   from Azotobacter chroococcum grown under nitrogen-fixing conditions.";
RL   Biochem. J. 277:313-319(1991).
CC   -!- FUNCTION: Low-potential electron donor to a number of redox enzymes.
CC       NifF is the electron donor to nitrogenase.
CC   -!- COFACTOR:
CC       Name=FMN; Xref=ChEBI:CHEBI:58210;
CC   -!- SIMILARITY: Belongs to the flavodoxin family. {ECO:0000305}.
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DR   EMBL; M73019; AAB36613.1; -; Genomic_DNA.
DR   AlphaFoldDB; P23001; -.
DR   SMR; P23001; -.
DR   GO; GO:0009055; F:electron transfer activity; IEA:InterPro.
DR   GO; GO:0010181; F:FMN binding; IEA:InterPro.
DR   GO; GO:0016655; F:oxidoreductase activity, acting on NAD(P)H, quinone or similar compound as acceptor; IEA:UniProt.
DR   GO; GO:0009399; P:nitrogen fixation; IEA:UniProtKB-KW.
DR   Gene3D; 3.40.50.360; -; 1.
DR   InterPro; IPR001094; Flavdoxin-like.
DR   InterPro; IPR008254; Flavodoxin/NO_synth.
DR   InterPro; IPR001226; Flavodoxin_CS.
DR   InterPro; IPR010086; Flavodoxin_lc.
DR   InterPro; IPR029039; Flavoprotein-like_sf.
DR   Pfam; PF00258; Flavodoxin_1; 1.
DR   PIRSF; PIRSF038996; FldA; 1.
DR   PRINTS; PR00369; FLAVODOXIN.
DR   SUPFAM; SSF52218; SSF52218; 1.
DR   TIGRFAMs; TIGR01752; flav_long; 1.
DR   PROSITE; PS00201; FLAVODOXIN; 1.
DR   PROSITE; PS50902; FLAVODOXIN_LIKE; 1.
PE   1: Evidence at protein level;
KW   Direct protein sequencing; Electron transport; Flavoprotein; FMN;
KW   Nitrogen fixation; Transport.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000269|PubMed:1859358"
FT   CHAIN           2..180
FT                   /note="Flavodoxin B"
FT                   /id="PRO_0000171603"
FT   DOMAIN          4..173
FT                   /note="Flavodoxin-like"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00088"
SQ   SEQUENCE   180 AA;  19524 MW;  A19BE720B93F551D CRC64;
     MAKIGLFFGS NTGKTRKVAK SIKKRFDDET MSDAVNVNRV SAEDFAQYQF LILGTPTLGE
     GELPGLSSDC ENESWEEFLP KIEGLDFSGK TVALFGLGDQ VGYPENFLDA MGELHSFFTE
     RGAKVVGAWS TDGYEFEGST AVVDGKFVGL ALDLDNQSGK TDERVAAWLA QIAPEFGLSL