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Literature summary extracted from

  • Liu, D.R.; Huang, W.X.; Cai, X.L.
    Oligomerization of rice granule-bound starch synthase 1 modulates its activity regulation (2013), Plant Sci., 210, 141-150.
    View publication on PubMed

Cloned(Commentary)

EC Number Cloned (Comment) Organism
2.4.1.242 expression in Escherichia coli Oryza sativa

KM Value [mM]

EC Number KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
2.4.1.242 0.027
-
 ADP-glucose enzyme oligomer, pH not specified in the publication, temperature not specified in the publication Oryza sativa
2.4.1.242 0.03
-
 ADP-glucose enzyme monomer, pH not specified in the publication, temperature not specified in the publication Oryza sativa

Organism

EC Number Organism UniProt Comment Textmining
2.4.1.242 Oryza sativa
-
-
-
2.4.1.242 Oryza sativa Zh11
-
-
-

Posttranslational Modification

EC Number Posttranslational Modification Comment Organism
2.4.1.242 phosphoprotein phosphorylation status is strongly enhanced by mitogen-activated protein kinase MAPK and ATP treatment and is sharply weakened by protein phosphatase treatment Oryza sativa

Source Tissue

EC Number Source Tissue Comment Organism Textmining
2.4.1.242 endosperm
-
 Oryza sativa
-

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2.4.1.242 ADP-glucose + (1,4-alpha-D-glucosyl)n
-
 Oryza sativa ADP + (1,4-alpha-D-glucosyl)n+1
-
 ?
2.4.1.242 ADP-glucose + (1,4-alpha-D-glucosyl)n
-
 Oryza sativa Zh11 ADP + (1,4-alpha-D-glucosyl)n+1
-
 ?

Subunits

EC Number Subunits Comment Organism
2.4.1.242 monomer and oligomer, gel filtration and SDS-PAGE Oryza sativa
2.4.1.242 oligomer and monomer, gel filtration and SDS-PAGE Oryza sativa

General Information

EC Number General Information Comment Organism
2.4.1.242 physiological function GBSS1 can form oligomers in rice endosperm, and oligomerized OsGBSS1 exhibits much higher specific enzymatic activity than the monomer. A monomer-oligomer transition equilibrium occurs in the endosperm during development. Redox potential is a key factor affecting the oligomer percentage as well as the enzymatic activity. Adenosine diphosphate glucose, the direct donor of glucose, also impacts GBSS1 oligomerization in a concentration-dependent manner. GBSS1 oligomerization is influenced by phosphorylation status, which is strongly enhanced by mitogen-activated protein kinase MAPK and ATP treatment and is sharply weakened by protein phosphatase treatment Oryza sativa