ID   DFRA_MEDSA              Reviewed;         217 AA.
AC   P51109;
DT   01-OCT-1996, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-1996, sequence version 1.
DT   03-AUG-2022, entry version 80.
DE   RecName: Full=Dihydroflavonol 4-reductase;
DE            Short=DFR;
DE            EC=1.1.1.219 {ECO:0000250|UniProtKB:Q9XES5};
DE   AltName: Full=Dihydrokaempferol 4-reductase;
DE   AltName: Full=Flavanone 4-reductase;
DE            Short=FNR;
DE            EC=1.1.1.234 {ECO:0000250|UniProtKB:Q9XES5};
DE   Flags: Fragment;
GN   Name=DFR1;
OS   Medicago sativa (Alfalfa).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   rosids; fabids; Fabales; Fabaceae; Papilionoideae; 50 kb inversion clade;
OC   NPAAA clade; Hologalegina; IRL clade; Trifolieae; Medicago.
OX   NCBI_TaxID=3879;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   STRAIN=cv. Varia A2;
RX   PubMed=8541503; DOI=10.1007/bf00041167;
RA   Charrier B., Coronado C., Kondorosi A., Ratet P.;
RT   "Molecular characterization and expression of alfalfa (Medicago sativa L.)
RT   flavanone-3-hydroxylase and dihydroflavonol-4-reductase encoding genes.";
RL   Plant Mol. Biol. 29:773-786(1995).
CC   -!- FUNCTION: Bifunctional enzyme involved in flavonoid metabolism.
CC       {ECO:0000250|UniProtKB:Q9XES5}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a (2R,3S,4S)-leucoanthocyanidin + NADP(+) = a (2R,3R)-
CC         dihydroflavonol + H(+) + NADPH; Xref=Rhea:RHEA:54444,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:57783, ChEBI:CHEBI:58349,
CC         ChEBI:CHEBI:138176, ChEBI:CHEBI:138188; EC=1.1.1.219;
CC         Evidence={ECO:0000250|UniProtKB:Q9XES5};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=(2S)-flavan-4-ol + NADP(+) = (2S)-flavanone + H(+) + NADPH;
CC         Xref=Rhea:RHEA:11228, ChEBI:CHEBI:15378, ChEBI:CHEBI:15605,
CC         ChEBI:CHEBI:15606, ChEBI:CHEBI:57783, ChEBI:CHEBI:58349;
CC         EC=1.1.1.234; Evidence={ECO:0000250|UniProtKB:Q9XES5};
CC   -!- PATHWAY: Pigment biosynthesis; anthocyanin biosynthesis.
CC   -!- SIMILARITY: Belongs to the NAD(P)-dependent epimerase/dehydratase
CC       family. Dihydroflavonol-4-reductase subfamily. {ECO:0000305}.
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DR   EMBL; X80222; CAA56508.1; -; mRNA.
DR   PIR; S61416; S61416.
DR   AlphaFoldDB; P51109; -.
DR   SMR; P51109; -.
DR   PRIDE; P51109; -.
DR   UniPathway; UPA00009; -.
DR   GO; GO:0045552; F:dihydrokaempferol 4-reductase activity; IEA:UniProtKB-EC.
DR   GO; GO:0047890; F:flavanone 4-reductase activity; IEA:UniProtKB-EC.
DR   GO; GO:0009718; P:anthocyanin-containing compound biosynthetic process; IEA:UniProtKB-UniPathway.
DR   InterPro; IPR001509; Epimerase_deHydtase.
DR   InterPro; IPR036291; NAD(P)-bd_dom_sf.
DR   Pfam; PF01370; Epimerase; 1.
DR   SUPFAM; SSF51735; SSF51735; 1.
PE   2: Evidence at transcript level;
KW   Flavonoid biosynthesis; NADP; Oxidoreductase.
FT   CHAIN           <1..>217
FT                   /note="Dihydroflavonol 4-reductase"
FT                   /id="PRO_0000215570"
FT   BINDING         27
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000250|UniProtKB:A0A059TC02"
FT   BINDING         146
FT                   /ligand="NADP(+)"
FT                   /ligand_id="ChEBI:CHEBI:58349"
FT                   /evidence="ECO:0000250|UniProtKB:A0A059TC02"
FT   NON_TER         1
FT   NON_TER         217
SQ   SEQUENCE   217 AA;  24389 MW;  E8A43AA76CBE3EB2 CRC64;
     GSWLVMRLME PGYMVRATVR DPENLKKVSP LLELPGAKSK LSIWKADLGE EGSFDEAIKG
     CTGVFHVATP MDFESKDPEN EMIKPTIKGV LDIMKACLKA KTVRRLIYTS SAGTLNVTED
     QKPLWDESCW SDVEFCRRVK MTGWMYFVSK TLAEQEAWKF AKEHKMDVIT IIPPLVVGPF
     LIPTMPPSLI TALSPITGNE AHYSIIKQGQ YVHLDDL