ID   CHSY_HYDMC              Reviewed;         389 AA.
AC   O82144;
DT   15-JUL-1999, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1998, sequence version 1.
DT   25-MAY-2022, entry version 78.
DE   RecName: Full=Chalcone synthase;
DE            EC=2.3.1.74;
DE   AltName: Full=Naringenin-chalcone synthase;
GN   Name=CHS;
OS   Hydrangea macrophylla (Bigleaf hydrangea) (Viburnum macrophyllum).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   asterids; Cornales; Hydrangeaceae; Hydrangeeae; Hydrangea;
OC   Hydrangea sect. Macrophyllae.
OX   NCBI_TaxID=23110;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   STRAIN=Var. Thunbergii; TISSUE=Leaf;
RA   Akiyama T., Shibuya M., Ebizuka Y.;
RT   "cDNA cloning of polyketide synthases from Hydrangea macrophylla var.
RT   thunbergii.";
RL   Submitted (FEB-1998) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: The primary product of this enzyme is 4,2',4',6'-
CC       tetrahydroxychalcone (also termed naringenin-chalcone or chalcone)
CC       which can under specific conditions spontaneously isomerize into
CC       naringenin.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=4-coumaroyl-CoA + 2 H(+) + 3 malonyl-CoA = 2',4,4',6'-
CC         tetrahydroxychalcone + 3 CO2 + 4 CoA; Xref=Rhea:RHEA:11128,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:16526, ChEBI:CHEBI:57287,
CC         ChEBI:CHEBI:57355, ChEBI:CHEBI:57384, ChEBI:CHEBI:77645; EC=2.3.1.74;
CC         Evidence={ECO:0000255|PROSITE-ProRule:PRU10023};
CC   -!- PATHWAY: Secondary metabolite biosynthesis; flavonoid biosynthesis.
CC   -!- SIMILARITY: Belongs to the thiolase-like superfamily. Chalcone/stilbene
CC       synthases family. {ECO:0000305}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; AB011467; BAA32732.1; -; mRNA.
DR   AlphaFoldDB; O82144; -.
DR   SMR; O82144; -.
DR   UniPathway; UPA00154; -.
DR   GO; GO:0102128; F:chalcone synthase activity; IEA:UniProtKB-EC.
DR   GO; GO:0016210; F:naringenin-chalcone synthase activity; IEA:UniProtKB-EC.
DR   GO; GO:0009813; P:flavonoid biosynthetic process; IEA:UniProtKB-UniPathway.
DR   Gene3D; 3.40.47.10; -; 2.
DR   InterPro; IPR012328; Chalcone/stilbene_synt_C.
DR   InterPro; IPR001099; Chalcone/stilbene_synt_N.
DR   InterPro; IPR018088; Chalcone/stilbene_synthase_AS.
DR   InterPro; IPR011141; Polyketide_synthase_type-III.
DR   InterPro; IPR016039; Thiolase-like.
DR   PANTHER; PTHR11877; PTHR11877; 1.
DR   Pfam; PF02797; Chal_sti_synt_C; 1.
DR   Pfam; PF00195; Chal_sti_synt_N; 1.
DR   PIRSF; PIRSF000451; PKS_III; 1.
DR   SUPFAM; SSF53901; SSF53901; 2.
DR   PROSITE; PS00441; CHALCONE_SYNTH; 1.
PE   2: Evidence at transcript level;
KW   Acyltransferase; Flavonoid biosynthesis; Transferase.
FT   CHAIN           1..389
FT                   /note="Chalcone synthase"
FT                   /id="PRO_0000215981"
FT   ACT_SITE        164
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU10023"
SQ   SEQUENCE   389 AA;  42635 MW;  187FC9CB9F33F568 CRC64;
     MVTVEEVRKA QRAEGPATIL AIGTATPPNY VDQSTYPDFY FRVTNSEHKK ELKAKFQRMC
     DNSQIKKRYM HLTEEILKEN PNICAYMAPS LDARQDMVVV EIPKLGKEAA TRAIKEWGQP
     KSKITHLVFC TTSGVDMPGA DYQLTKLLGL RPSVKRLMMY QQGCFAGGTV LRLAKDLAEN
     NKGARVLVVC SEITAVTFRG PSDTHLDSLV GQALFGDGAA AVIIGSDPMP EVEKPLFEIV
     SAAQTILPDS DGAIDGHLRE VGLTFHLLKD VPGLISKNIE KSLVEAFRPL DISDWNSIFW
     IAHPGGPAIL DQVEKKLALK PEKLRATRNV LSDYGNMSSA CVLFIMDEMR KNSAEEGLMT
     TGEGLEWGVL FGFGPGLTVE TVVLHGVST