ID   2.4.1.242
DE   NDP-glucose--starch glucosyltransferase.
AN   GBSS.
AN   GBSSI.
AN   GBSSII.
AN   granule-bound starch synthase.
AN   granule-bound starch synthase I.
AN   granule-bound starch synthase II.
AN   NDPglucose-starch glucosyltransferase.
AN   starch granule-bound nucleoside diphosphate glucose-starch
AN   glucosyltransferase.
AN   starch synthase II.
AN   waxy protein.
CA   [(1->4)-alpha-D-glucosyl](n) + an NDP-alpha-D-glucose = [(1->4)-alpha-D-
CA   glucosyl](n+1) + a ribonucleoside 5'-diphosphate + H(+).
CC   -!- Unlike EC 2.4.1.11 and EC 2.4.1.21 which use UDP-glucose and ADP-
CC       glucose, respectively, this enzyme can use either UDP- or ADP-
CC       glucose.
CC   -!- Mutants that lack the Wx (waxy) allele cannot produce this enzyme,
CC       which plays an important role in the normal synthesis of amylose.
CC   -!- In such mutants, only amylopectin is produced in the endosperm or
CC       pollen.
DR   Q8LL05, SSG1B_HORVU;  P84766, SSG1_AEGTS ;  Q9MAQ0, SSG1_ARATH ;
DR   P84633, SSG1_FAGES ;  P09842, SSG1_HORVU ;  Q42857, SSG1_IPOBA ;
DR   P04713, SSG1_MAIZE ;  Q43784, SSG1_MANES ;  Q42968, SSG1_ORYGL ;
DR   P0C585, SSG1_ORYSA ;  A2Y8X2, SSG1_ORYSI ;  Q0DEV5, SSG1_ORYSJ ;
DR   Q43092, SSG1_PEA   ;  P84765, SSG1_SECCE ;  Q00775, SSG1_SOLTU ;
DR   Q43134, SSG1_SORBI ;  P27736, SSG1_WHEAT ;
//