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Literature summary extracted from

  • Hejazi, M.; Mahlow, S.; Fettke, J.
    The glucan phosphorylation mediated by alpha-glucan, water dikinase (GWD) is also essential in the light phase for a functional transitory starch turn-over (2014), Plant Signal. Behav., 9, e28892.
    View publication on PubMedView publication on EuropePMC

Activating Compound

EC Number Activating Compound Comment Organism Structure
2.7.9.4 additional information light increases the enzyme activity Arabidopsis thaliana

Localization

EC Number Localization Comment Organism GeneOntology No. Textmining
2.7.9.4 starch granule
-
 Arabidopsis thaliana
-
-

Metals/Ions

EC Number Metals/Ions Comment Organism Structure
2.7.9.4 Mg2+ required Arabidopsis thaliana

Natural Substrates/ Products (Substrates)

EC Number Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
2.7.9.4 ATP + alpha-glucan + H2O Arabidopsis thaliana GWD phosphorylates the hydroxyl group at carbon atoms 6 AMP + phospho-alpha-glucan + phosphate
-
 ?

Organism

EC Number Organism UniProt Comment Textmining
2.7.9.4 Arabidopsis thaliana Q9SAC6
-
-

Source Tissue

EC Number Source Tissue Comment Organism Textmining
2.7.9.4 leaf
-
 Arabidopsis thaliana
-

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2.7.9.4 ATP + alpha-glucan + H2O GWD phosphorylates the hydroxyl group at carbon atoms 6 Arabidopsis thaliana AMP + phospho-alpha-glucan + phosphate
-
 ?

Synonyms

EC Number Synonyms Comment Organism
2.7.9.4 GWD
-
 Arabidopsis thaliana

Cofactor

EC Number Cofactor Comment Organism Structure
2.7.9.4 ATP
-
 Arabidopsis thaliana

General Information

EC Number General Information Comment Organism
2.7.9.4 physiological function glucan phosphorylation mediated by alpha-glucan, water dikinase is essential in the light phase for a functional transitory starch turnover. The length of the light phase affects the phosphorylation state of the transitory starch and, by this, the average leaf starch content and the resulting growth of the plants. The longer the light period, the higher the starch phosphorylation rate at G-6 of alpha-glucan and the lower the starch content. Starch phosphorylation by GWD in the light phase is in parts necessary for proper starch degradation in the following night Arabidopsis thaliana