ID   SUS2_DAUCA              Reviewed;         801 AA.
AC   O49845;
DT   15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-JUN-1998, sequence version 1.
DT   25-MAY-2022, entry version 75.
DE   RecName: Full=Sucrose synthase isoform 2;
DE            EC=2.4.1.13;
DE   AltName: Full=Sucrose synthase isoform II;
DE   AltName: Full=Sucrose-UDP glucosyltransferase 2;
DE   AltName: Full=Susy*Dc2;
OS   Daucus carota (Wild carrot).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   asterids; campanulids; Apiales; Apiaceae; Apioideae; Scandiceae; Daucinae;
OC   Daucus; Daucus sect. Daucus.
OX   NCBI_TaxID=4039;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=cv. Nantaise; TISSUE=Leaf;
RX   PubMed=10080700; DOI=10.1023/a:1006199003756;
RA   Sturm A., Lienhard S., Schatt S., Hardegger M.;
RT   "Tissue-specific expression of two genes for sucrose synthase in carrot
RT   (Daucus carota L.).";
RL   Plant Mol. Biol. 39:349-360(1999).
CC   -!- FUNCTION: Sucrose-cleaving enzyme that provides UDP-glucose and
CC       fructose for various metabolic pathways.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=an NDP-alpha-D-glucose + D-fructose = a ribonucleoside 5'-
CC         diphosphate + H(+) + sucrose; Xref=Rhea:RHEA:16241,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:17992, ChEBI:CHEBI:37721,
CC         ChEBI:CHEBI:57930, ChEBI:CHEBI:76533; EC=2.4.1.13;
CC   -!- SUBUNIT: Homotetramer. {ECO:0000250}.
CC   -!- TISSUE SPECIFICITY: Exclusively expressed in flowers.
CC   -!- SIMILARITY: Belongs to the glycosyltransferase 1 family. Plant sucrose
CC       synthase subfamily. {ECO:0000305}.
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DR   EMBL; Y16091; CAA76057.1; -; Genomic_DNA.
DR   PIR; T14338; T14338.
DR   AlphaFoldDB; O49845; -.
DR   SMR; O49845; -.
DR   CAZy; GT4; Glycosyltransferase Family 4.
DR   BRENDA; 2.4.1.13; 1841.
DR   GO; GO:0016157; F:sucrose synthase activity; IEA:UniProtKB-EC.
DR   GO; GO:0005985; P:sucrose metabolic process; IEA:InterPro.
DR   InterPro; IPR001296; Glyco_trans_1.
DR   InterPro; IPR000368; Sucrose_synth.
DR   InterPro; IPR012820; Sucrose_synthase_pln/cyn.
DR   PANTHER; PTHR45839; PTHR45839; 1.
DR   Pfam; PF00534; Glycos_transf_1; 1.
DR   Pfam; PF00862; Sucrose_synth; 1.
DR   TIGRFAMs; TIGR02470; sucr_synth; 1.
PE   2: Evidence at transcript level;
KW   Glycosyltransferase; Transferase.
FT   CHAIN           1..801
FT                   /note="Sucrose synthase isoform 2"
FT                   /id="PRO_0000204648"
FT   REGION          271..748
FT                   /note="GT-B glycosyltransferase"
FT                   /evidence="ECO:0000250|UniProtKB:P49040"
SQ   SEQUENCE   801 AA;  91651 MW;  A73E196D96038E5D CRC64;
     MAQPLLSLRQ RFESTFSSHR QEIFMFLSRI QSLGNGILKP HQLFSEFQAI SKIDRLKLED
     SALVQLLNSA QEAIVCSPWI ALAIRLRPGV WEYVRLNVHQ LVVEELTVPD YLYLKEELVN
     ASSNGNFVLE LDFAPFTASI PRPTLTKSIG NGVEFLNRHL SAKMFQDKDS MHPLLDFLRL
     HHHNGRTLML NNRVQTVNGL QDILRIAGEY LSKLPSDTPY SDFEHKFQEI GFERGWGDTA
     EHVSEMFHML LDLLEAPDAC TLETFLGKIP MIFNVVILSP HGYFAQENVL GYPDTGGQVV
     YILDQVPAME REMTKRIKEQ GLDIIPRILI VTRLLPDAVG TTCNLRLEKV FGAEHSHILR
     VPFRTEKGIL RKWISRFEVW PYMETFTEDV AKEIALELKA KPDLIIGNYS EGNLVASLLA
     NKLGVTQCTI AHALEKTKYP DSDIYWEKFD KKYHFSSQFT ADLIAMNHTD FIITSTFQEI
     AGSKDTVGQY ESHTAFTMPG LYRVVHGIDV FDPKFNIVSP GADTSVYYPY TEKKRRLTAL
     HPEIEDLLFS SVENKEHICV LKDRYKPILF TMARLDNVKN LTGIVEWYAK NPKLRELVNL
     VVVGGDRRKE SKDLEEQAQM KKMYGLIDTY KLNGQFRWIS AQKNRVRNGE LYRCIADTKG
     AFVQPAFYEA FGLTVIEAMT CGLPTFATIH GGPAEIIVHG TSGFHIDPYH GEKAAELIVN
     FFERCKTEPS HWETISAGGL KRIQEKYTWQ IYSERLLTLG GVYGFWKHVS KLDRIEIRRY
     LEMFCALKYR NLAESVPLAV D