ID   CHSA_IPONI              Reviewed;         344 AA.
AC   P48395;
DT   01-FEB-1996, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-1996, sequence version 1.
DT   25-MAY-2022, entry version 81.
DE   RecName: Full=Chalcone synthase A;
DE            EC=2.3.1.74;
DE   AltName: Full=Naringenin-chalcone synthase A;
DE            Short=CHS-A;
DE   Flags: Fragment;
GN   Name=CHSA;
OS   Ipomoea nil (Japanese morning glory) (Pharbitis nil).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   asterids; lamiids; Solanales; Convolvulaceae; Ipomoeeae; Ipomoea.
OX   NCBI_TaxID=35883;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=7724563; DOI=10.1073/pnas.92.8.3338;
RA   Durbin M.L., Learn G.H., Huttley G.A., Clegg M.T.;
RT   "Evolution of the chalcone synthase gene family in the genus Ipomoea.";
RL   Proc. Natl. Acad. Sci. U.S.A. 92:3338-3342(1995).
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}.
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DR   EMBL; U15943; AAC49028.1; -; Genomic_DNA.
DR   AlphaFoldDB; P48395; -.
DR   SMR; P48395; -.
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   3: Inferred from homology;
KW   Acyltransferase; Flavonoid biosynthesis; Transferase.
FT   CHAIN           1..>344
FT                   /note="Chalcone synthase A"
FT                   /id="PRO_0000216035"
FT   ACT_SITE        167
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU10023"
FT   NON_TER         344
SQ   SEQUENCE   344 AA;  38352 MW;  16EDC8D76F940404 CRC64;
     MSTILTNTWT RREKRIEGHA KILAIGTAIP ANWVDQTTYP DFYFRITNSE HLLEHKEKFR
     RICNKSKIRK RHLVITEELL KKNPNLCTYN EASLNTRQDI LVSEVPKLGK EAAMKAIKEW
     GRPISEITHL VFCTSSGVDM PGADFQLAKL LGLSSSVNRL MMYQQGCNAG AAMLRLAKDL
     AENNKGGRVL VVCSEVMLNV FRGPSLEQED YLLAQCLFGD GSAAVIVGTE PRPGLETPLF
     ELVSAAQTTI PDTDSHLKLH LREMGLTFHC SKAVPSLITQ NVEDYLVKAF EPFGISDWNS
     IFWILHPGGI AILDRVEEKL GLEPEKLRAS RDVLSESGNL TSAC