CHSB_IPOTF
ID CHSB_IPOTF Reviewed; 366 AA.
AC P48402;
DT 01-FEB-1996, integrated into UniProtKB/Swiss-Prot.
DT 01-FEB-1996, sequence version 1.
DT 25-MAY-2022, entry version 80.
DE RecName: Full=Chalcone synthase B;
DE EC=2.3.1.74;
DE AltName: Full=Naringenin-chalcone synthase B;
DE Short=CHS-B;
DE Flags: Fragment;
GN Name=CHSB;
OS Ipomoea trifida (Morning glory).
OC Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC asterids; lamiids; Solanales; Convolvulaceae; Ipomoeeae; Ipomoea.
OX NCBI_TaxID=35884;
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; U15951; AAC49033.1; -; Genomic_DNA.
DR AlphaFoldDB; P48402; -.
DR SMR; P48402; -.
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..>366
FT /note="Chalcone synthase B"
FT /id="PRO_0000215998"
FT ACT_SITE 172
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU10023"
FT NON_TER 366
SQ SEQUENCE 366 AA; 40808 MW; 33448EB9177F775D CRC64;
MSTAVTMLTD TWSRRAKRFE IEGYAKILAI GTATPANWVD QTTYPDFYFR ITNSQHLLEH
KEKFRRICNK SNIRKRHMVL TEELLKKNPN LCTYNDASLN TRQDILVSEV PKLGKEAAMK
AIKVWGRPIS EITHLVFCTT SGVDMPGADF QLTKLLGLNS SVKRLMMYQQ GCNAGAAMLR
LAKDLAENNK GARVLVVCSE VMLSVFRGPS LQQEDNLLAQ CLFGDGSAAI IIGTDPRPGL
ETPLFELISA AQTIIPDTDS HLKLHVREMG LTFHCSKAVP TFITQNVEDC LVKAFEPYGI
SDWNSIFWVL HPGGNAIVEG VEETLGLAPE KLRASRDVLS EYGNLTSACV LFILDEVRKK
SKKDEQ