ID   FIXB_AZOVI              Reviewed;         360 AA.
AC   P53574;
DT   01-OCT-1996, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-1996, sequence version 1.
DT   03-AUG-2022, entry version 63.
DE   RecName: Full=Protein FixB;
GN   Name=fixB;
OS   Azotobacter vinelandii.
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Pseudomonadales;
OC   Pseudomonadaceae; Azotobacter.
OX   NCBI_TaxID=354;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=ATCC 478 / DSM 2289 / BCRC 14361 / JCM 21475 / KCTC 12137 / NBRC
RC   102612 / NCIMB 12096 / NRRL B-14641 / VKM B-1617 / NRS 16;
RA   Wientjens R., van Dongen W., Haaker H.;
RL   Submitted (JUL-1994) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: May play a role in a redox process involved in nitrogen
CC       fixation.
CC   -!- SUBUNIT: FixA and FixB form a heterodimer. {ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the ETF alpha-subunit/FixB family.
CC       {ECO:0000305}.
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DR   EMBL; X65515; CAA46489.1; -; Genomic_DNA.
DR   PIR; S49188; S49188.
DR   AlphaFoldDB; P53574; -.
DR   SMR; P53574; -.
DR   BioCyc; MetaCyc:MON-21374; -.
DR   GO; GO:0009055; F:electron transfer activity; IEA:InterPro.
DR   GO; GO:0050660; F:flavin adenine dinucleotide binding; IEA:InterPro.
DR   GO; GO:0009399; P:nitrogen fixation; IEA:UniProtKB-KW.
DR   CDD; cd01715; ETF_alpha; 1.
DR   Gene3D; 3.40.50.620; -; 1.
DR   InterPro; IPR029035; DHS-like_NAD/FAD-binding_dom.
DR   InterPro; IPR014730; ETF_a/b_N.
DR   InterPro; IPR001308; ETF_a/FixB.
DR   InterPro; IPR033947; ETF_alpha_N.
DR   InterPro; IPR014731; ETF_asu_C.
DR   InterPro; IPR018206; ETF_asu_C_CS.
DR   InterPro; IPR014729; Rossmann-like_a/b/a_fold.
DR   PANTHER; PTHR43153; PTHR43153; 1.
DR   Pfam; PF01012; ETF; 1.
DR   Pfam; PF00766; ETF_alpha; 1.
DR   PIRSF; PIRSF000089; Electra_flavoP_a; 1.
DR   SMART; SM00893; ETF; 1.
DR   SUPFAM; SSF52467; SSF52467; 1.
DR   PROSITE; PS00696; ETF_ALPHA; 1.
PE   3: Inferred from homology;
KW   Electron transport; FAD; Flavoprotein; Nitrogen fixation; Transport.
FT   CHAIN           1..360
FT                   /note="Protein FixB"
FT                   /id="PRO_0000167856"
FT   BINDING         293..321
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   360 AA;  39031 MW;  02DDC43447EFD2D6 CRC64;
     MSEQPKKPTK KKVELDPRFV DVRHVWVCIE SERGVVHPVS WELLGEGRKS VDALGGELYG
     VVICGPGERG KEICGEPVQH GADKAYLLQH EILRDYRNEP YTKALTDLVT ATQPEILMLG
     ATTLGRDLAG SVATTLGTGL VADCTELVID TETRNLASTR PTFDGSLLCK PSSAQRHRPQ
     MATVRPRMAM PEPDASRSGE IIEVPFSMIE TDIITKVLEF IPDDTRDKPN LPFADIIVAG
     GRGLRNQENF QLVWDLAKVL GAEVGASRPI VQAGWAELDR QVGQSGKTVR PKLYIAAGIS
     GAIQHRVGMD GADVIIAINT DPNAPIFDFA HYGIVGNAIT VLPALTEAFK ARLGQLKKAG