Protein
Soluble starch synthase 1, chloroplastic/amyloplastic
Organism
Oryza sativa subsp. japonica
Function
Involved in starch synthesis in endosperm amyloplasts (PubMed:16443699, PubMed:21417378, PubMed:21730357). Plays a role in the elongation of amylopectin chains (PubMed:16443699, PubMed:21417378, PubMed:21730357). Synthesizes preferentially amylopectin chains with a degree of polymerization (DP) of 7 to 11 by elongating chains with a DP of 4 to 7 (PubMed:16443699). Generates distincly chains with a DP of 8 to 12 chains from short chains with a DP of 6 to 7 (PubMed:16443699).
Similarity
Belongs to the glycosyltransferase 1 family. Bacterial/plant glycogen synthase subfamily.
Sequence
MATAAGMGIGAACLVAPQVRPGRRLRLQRVRRRCVAELSRDGGSAQRPLAPAPLVKQPVLPTFLVPTSTPPAPTQSPAPAPTPPPLPDSGVGEIEPDLEGLTEDSIDKTIFVASEQESEIMDVKEQAQAKVTRSVVFVTGEASPYAKSGGLGDVCGSLPIALALRGHRVMVVMPRYMNGALNKNFANAFYTEKHIKIPCFGGEHEVTFFHEYRDSVDWVFVDHPSYHRPGNLYGDNFGAFGDNQFRYTLLCYAACEAPLILELGGYIYGQKCMFVVNDWHASLVPVLLAAKYRPYGVYRDARSVLVIHNLAHQGVEPASTYPDLGLPPEWYGALEWVFPEWARRHALDKGEAVNFLKGAVVTADRIVTVSQGYSWEVTTAEGGQGLNELLSSRKSVLNGIVNGIDINDWNPSTDKFLPYHYSVDDLSGKAKCKAELQKELGLPIRPDVPLIGFIGRLDYQKGIDLIKLAIPDLMRDNIQFVMLGSGDPGFEGWMRSTESGYRDKFRGWVGFSVPVSHRITAGCDILLMPSRFEPCGLNQLYAMQYGTVPVVHGTGGLRDTVENFNPFAEKGEQGTGWAFSPLTIEKMLWALRMAISTYREHKSSWEGLMKRGMSSDFTWDHAASQYEQIFEWAFMDQPYVM