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Literature summary extracted from

  • Wang, Z.M.; Li, H.X.; Liu, X.F.; He, Y.; Zeng, H.L.
    Reduction of pyruvate orthophosphate dikinase activity is associated with high temperature-induced chalkiness in rice grains (2015), Plant Physiol. Biochem., 89, 76-84.
    View publication on PubMed

Localization

EC Number Localization Comment Organism GeneOntology No. Textmining
2.7.9.1 cytosol
-
 Oryza sativa Japonica Group 5829
-

Metals/Ions

EC Number Metals/Ions Comment Organism Structure
2.7.9.1 Mg2+ required Oryza sativa Japonica Group

Natural Substrates/ Products (Substrates)

EC Number Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
2.7.9.1 ATP + pyruvate + phosphate Oryza sativa Japonica Group
-
 AMP + phosphoenolpyruvate + diphosphate
-
 r

Organism

EC Number Organism UniProt Comment Textmining
2.7.9.1 Oryza sativa Japonica Group Q75KR1 cultivars 9311 and TXZ-25
-

Posttranslational Modification

EC Number Posttranslational Modification Comment Organism
2.7.9.1 phosphoprotein rapid phosphorylation mechanism of the enzyme, phosphorylation at residue Thr527 of PPDK. The phosphorylation rate of the enzyme is increased at higher temperature of 31°C compared to control at 24°C Oryza sativa Japonica Group

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2.7.9.1 ATP + pyruvate + phosphate
-
 Oryza sativa Japonica Group AMP + phosphoenolpyruvate + diphosphate
-
 r

Synonyms

EC Number Synonyms Comment Organism
2.7.9.1 Cyppdk
-
 Oryza sativa Japonica Group
2.7.9.1 cytosolic pyruvate orthophosphate dikinase
-
 Oryza sativa Japonica Group
2.7.9.1 PPDK2
-
 Oryza sativa Japonica Group
2.7.9.1 pyruvate orthophosphate dikinase
-
 Oryza sativa Japonica Group
2.7.9.1 pyruvate, phosphate dikinase 2
-
 Oryza sativa Japonica Group

Temperature Optimum [°C]

EC Number Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
2.7.9.1 30
-
 assay at Oryza sativa Japonica Group

pH Optimum

EC Number pH Optimum Minimum pH Optimum Maximum Comment Organism
2.7.9.1 8
-
 assay at Oryza sativa Japonica Group

Cofactor

EC Number Cofactor Comment Organism Structure
2.7.9.1 AMP
-
 Oryza sativa Japonica Group
2.7.9.1 ATP
-
 Oryza sativa Japonica Group

Expression

EC Number Organism Comment Expression
2.7.9.1 Oryza sativa Japonica Group a reduction in PPDK activities due to high temperature (31°C) is observed during the middle and late grain filling periods, accompanied by downregulated cyPPDK mRNA and protein levels, temperature effects on the developmental regulation of PPDK activity are confirmed at transcription, translation and post-translational levels down

General Information

EC Number General Information Comment Organism
2.7.9.1 malfunction a reduction in PPDK activities due to high temperature (31°C) is observed during the middle and late grain filling periods, accompanied by downregulated cyPPDK mRNA and protein levels, leading to high temperature-induced chalkiness. Rice chalkiness due to high temperature during grain filling lower the grain quality. Temperature effects on the developmental regulation of PPDK activity are confirmed at transcription, translation and post-translational levels. Comparison of rice grain types at 24°C and 31°C of the two cultivars, overview Oryza sativa Japonica Group
2.7.9.1 additional information PPDK activities are insensitive to variation in PPDK levels, suggesting the rapid phosphorylation mechanism of this protein. The phosphorylation rate of the enzyme is increased at higher temperature of 31°C compared to control at 24°C Oryza sativa Japonica Group
2.7.9.1 physiological function a function of isozyme cyPPDK in rice is to modulate carbon metabolism during grain filling Oryza sativa Japonica Group