ID   SSG1_SECCE              Reviewed;          21 AA.
AC   P84765; Q9S7Q0;
DT   21-FEB-2006, integrated into UniProtKB/Swiss-Prot.
DT   21-FEB-2006, sequence version 1.
DT   11-DEC-2019, entry version 32.
DE   RecName: Full=Granule-bound starch synthase 1;
DE            EC=2.4.1.242;
DE   AltName: Full=Granule-bound starch synthase I;
DE            Short=GBSS-I;
DE   Flags: Fragment;
OS   Secale cereale (Rye).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; Liliopsida; Poales; Poaceae; BOP clade;
OC   Pooideae; Triticodae; Triticeae; Hordeinae; Secale.
OX   NCBI_TaxID=4550;
RN   [1] {ECO:0000305}
RP   PROTEIN SEQUENCE.
RC   STRAIN=cv. Prolific {ECO:0000269|PubMed:8595054};
RX   PubMed=8595054; DOI=10.1007/bf00553625;
RA   Taira T., Fujita N., Takaoka K., Uematsu M., Wadano A., Kozaki S.,
RA   Okabe S.;
RT   "Variation in the primary structure of waxy proteins (granule-bound starch
RT   synthase) in diploid cereals.";
RL   Biochem. Genet. 33:269-281(1995).
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         Evidence={ECO:0000250|UniProtKB:P27736};
CC   -!- PATHWAY: Glycan biosynthesis; starch biosynthesis.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast {ECO:0000250}. Plastid,
CC       amyloplast {ECO:0000250}. Note=Amyloplast or chloroplast, granule-
CC       bound. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the glycosyltransferase 1 family.
CC       Bacterial/plant glycogen synthase subfamily. {ECO:0000255}.
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DR   UniPathway; UPA00152; -.
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:0019252; P:starch biosynthetic process; IEA:UniProtKB-UniPathway.
PE   1: Evidence at protein level;
KW   Amyloplast; Chloroplast; Direct protein sequencing; Glycosyltransferase;
KW   Plastid; Starch biosynthesis; Transferase.
FT   CHAIN           1..>21
FT                   /note="Granule-bound starch synthase 1"
FT                   /evidence="ECO:0000305"
FT                   /id="PRO_0000223523"
FT   NON_TER         21
FT                   /evidence="ECO:0000303|PubMed:8595054"
SQ   SEQUENCE   21 AA;  2043 MW;  67C6074B9C314273 CRC64;
     ATGSGGMNLV FVGAEMAPXX X