ID   TRXB_ALIFS              Reviewed;          45 AA.
AC   P80892;
DT   15-JUL-1998, integrated into UniProtKB/Swiss-Prot.
DT   15-JUL-1998, sequence version 1.
DT   09-APR-2025, entry version 94.
DE   RecName: Full=Thioredoxin reductase;
DE            Short=TRXR;
DE            EC=1.8.1.9;
DE   Flags: Fragment;
GN   Name=trxB;
OS   Aliivibrio fischeri (Vibrio fischeri).
OC   Bacteria; Pseudomonadati; Pseudomonadota; Gammaproteobacteria; Vibrionales;
OC   Vibrionaceae; Aliivibrio.
OX   NCBI_TaxID=668;
RN   [1]
RP   PROTEIN SEQUENCE.
RC   STRAIN=ATCC 33715 / Y-1;
RX   PubMed=9183020; DOI=10.1111/j.1432-1033.1997.00790.x;
RA   Petushkov V.N., Lee J.;
RT   "Purification and characterization of flavoproteins and cytochromes from
RT   the yellow bioluminescence marine bacterium Vibrio fischeri strain Y1.";
RL   Eur. J. Biochem. 245:790-796(1997).
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=[thioredoxin]-dithiol + NADP(+) = [thioredoxin]-disulfide +
CC         NADPH + H(+); Xref=Rhea:RHEA:20345, Rhea:RHEA-COMP:10698, Rhea:RHEA-
CC         COMP:10700, ChEBI:CHEBI:15378, ChEBI:CHEBI:29950, ChEBI:CHEBI:50058,
CC         ChEBI:CHEBI:57783, ChEBI:CHEBI:58349; EC=1.8.1.9;
CC   -!- COFACTOR:
CC       Name=FAD; Xref=ChEBI:CHEBI:57692;
CC         Evidence={ECO:0000250|UniProtKB:P0A9P4};
CC       Note=Binds 1 FAD per subunit. {ECO:0000250|UniProtKB:P0A9P4};
CC   -!- SUBUNIT: Homodimer. {ECO:0000250|UniProtKB:P0A9P4}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm.
CC   -!- MISCELLANEOUS: The active site is a redox-active disulfide bond.
CC   -!- SIMILARITY: Belongs to the class-II pyridine nucleotide-disulfide
CC       oxidoreductase family. {ECO:0000305}.
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DR   AlphaFoldDB; P80892; -.
DR   SMR; P80892; -.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0004791; F:thioredoxin-disulfide reductase (NADPH) activity; IEA:UniProtKB-EC.
DR   Gene3D; 3.50.50.60; FAD/NAD(P)-binding domain; 1.
DR   InterPro; IPR003953; FAD-dep_OxRdtase_2_FAD-bd.
DR   InterPro; IPR036188; FAD/NAD-bd_sf.
DR   Pfam; PF00890; FAD_binding_2; 1.
DR   PRINTS; PR00469; PNDRDTASEII.
DR   SUPFAM; SSF51905; FAD/NAD(P)-binding domain; 1.
PE   1: Evidence at protein level;
KW   Cytoplasm; Direct protein sequencing; FAD; Flavoprotein; NADP;
KW   Oxidoreductase; Redox-active center.
FT   CHAIN           1..>45
FT                   /note="Thioredoxin reductase"
FT                   /id="PRO_0000166757"
FT   BINDING         35..42
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT   NON_TER         45
SQ   SEQUENCE   45 AA;  4658 MW;  D0696133DE491602 CRC64;
     MNVKHSKLLI LGSGPAGYTA AVYAARANLN PVMITGMQQG GQLTN
//