ID   SSG1_ORYSA              Reviewed;         606 AA.
AC   P0C585; P19395; Q1ZZT5; Q43012; Q43013; Q71F57; Q8GZD6; Q8S9C4; Q94LY7;
AC   Q9S7R1; Q9S7U4;
DT   24-JUL-2007, integrated into UniProtKB/Swiss-Prot.
DT   24-JUL-2007, sequence version 1.
DT   03-AUG-2022, entry version 54.
DE   RecName: Full=Granule-bound starch synthase 1, chloroplastic/amyloplastic;
DE            EC=2.4.1.242;
DE   AltName: Full=Granule-bound starch synthase I;
DE            Short=GBSS-I;
DE   Flags: Precursor;
GN   Name=WAXY; Synonyms=WX, WX-B;
OS   Oryza sativa (Rice).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; Liliopsida; Poales; Poaceae; BOP clade;
OC   Oryzoideae; Oryzeae; Oryzinae; Oryza.
OX   NCBI_TaxID=4530;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=cv. Lf spontanea;
RA   Wang Z.Y., Zheng F.Q., Gao J.P., Wang X.Q., Wu M., Zhang J.L., Hong M.M.;
RT   "Identification of two transposon-like elements in rice Wx gene.";
RL   Sci. China, Ser. B, Chem. Life Sci. Earth Sci. 37:437-447(1994).
CC   -!- FUNCTION: Required for the synthesis of amylose in endosperm.
CC       {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=[(1->4)-alpha-D-glucosyl](n) + an NDP-alpha-D-glucose =
CC         [(1->4)-alpha-D-glucosyl](n+1) + a ribonucleoside 5'-diphosphate +
CC         H(+); Xref=Rhea:RHEA:15873, Rhea:RHEA-COMP:9584, Rhea:RHEA-COMP:9587,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:15444, ChEBI:CHEBI:57930,
CC         ChEBI:CHEBI:76533; EC=2.4.1.242;
CC   -!- PATHWAY: Glycan biosynthesis; starch biosynthesis.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast. Plastid, amyloplast.
CC       Note=Amyloplast or chloroplast, granule-bound. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the glycosyltransferase 1 family.
CC       Bacterial/plant glycogen synthase subfamily. {ECO:0000305}.
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DR   EMBL; X64108; CAA45472.1; -; Genomic_DNA.
DR   AlphaFoldDB; P0C585; -.
DR   SMR; P0C585; -.
DR   Allergome; 11008; Ory s GBSS_I.
DR   BRENDA; 2.4.1.242; 4460.
DR   UniPathway; UPA00152; -.
DR   ExpressionAtlas; P0C585; baseline and differential.
DR   GO; GO:0009501; C:amyloplast; IEA:UniProtKB-SubCell.
DR   GO; GO:0009507; C:chloroplast; IEA:UniProtKB-SubCell.
DR   GO; GO:0102502; F:ADP-glucose-starch glucosyltransferase activity; IEA:UniProtKB-EC.
DR   GO; GO:0004373; F:glycogen (starch) synthase activity; IEA:InterPro.
DR   GO; GO:0019252; P:starch biosynthetic process; IEA:UniProtKB-UniPathway.
DR   HAMAP; MF_00484; Glycogen_synth; 1.
DR   InterPro; IPR001296; Glyco_trans_1.
DR   InterPro; IPR011835; GS/SS.
DR   InterPro; IPR013534; Starch_synth_cat_dom.
DR   Pfam; PF08323; Glyco_transf_5; 1.
DR   Pfam; PF00534; Glycos_transf_1; 1.
DR   TIGRFAMs; TIGR02095; glgA; 1.
PE   3: Inferred from homology;
KW   Amyloplast; Chloroplast; Glycosyltransferase; Plastid; Starch biosynthesis;
KW   Transferase; Transit peptide.
FT   TRANSIT         1..76
FT                   /note="Chloroplast"
FT                   /evidence="ECO:0000255"
FT   CHAIN           77..606
FT                   /note="Granule-bound starch synthase 1,
FT                   chloroplastic/amyloplastic"
FT                   /id="PRO_0000295648"
FT   REGION          29..67
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        44..67
FT                   /note="Polar residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   BINDING         97
FT                   /ligand="ADP-alpha-D-glucose"
FT                   /ligand_id="ChEBI:CHEBI:57498"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   606 AA;  66323 MW;  E11157468A5553CE CRC64;
     MSALTTSQLA TSATGFGIAD RSAPSSLLRH GFQGLKPRSP AGGDASSLSV TTSARATPKQ
     QRSVQRGSRR FPSVVVYATG AGMNVVFVGA EMAPWSKTGG LGDVLGGLPP AMAANGHRVM
     VISPRYDQYK DAWDTSVVAE IKVADRYERV RFFHCYKRGV DRVFIDHPSF LEKVWGKTGE
     KIYGPDTGVD YKDNQMRFSL LCQEAPRILN LNNNPYFKGT YGEDVVFVCN DWHTGPLPSY
     LKNNYQPNGI YRNAKVAFCI HNISYQGRFA FEDYPELNLS ERFKSSFDFI DGYDTPVEGR
     KINWMKAGIL ESDRVLTVSP YYAEELISGI ARGCELDNIM RLTGITGIVN GMDVSEWDPS
     KDKYITTKYD ATTAIEAKAL NKEALQAEAG LPVDRKVPLI AFIGRLEEQK GPDVMAAAIP
     ELMQENVQIV LLGTGKKKFE KLLKSMEEKY PGKVRAVVKF NAPLAHLIMA GADVLAVPSR
     FEPCGLIQLQ GMRYGTPCAC ASTGGLVDTV IEGKTGFHMG RLSVDCKVVE PSDVQKVATT
     LKRAIKIVGT PAYNEMVRNC MNQDLSWKGP AKNWENVLLG LGVAGSEPGV EGEEIAPLAK
     ENVAAP