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Literature summary for 2.7.9.1 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

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

Metals/Ions

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

Natural Substrates/ Products (Substrates)

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

Organism

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

Posttranslational Modification

Posttranslational Modification Comment Organism
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)

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

Synonyms

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

Temperature Optimum [°C]

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

pH Optimum

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

Cofactor

Cofactor Comment Organism Structure
AMP
-
Oryza sativa Japonica Group
ATP
-
Oryza sativa Japonica Group

Expression

Organism Comment Expression
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

General Information Comment Organism
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
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
physiological function a function of isozyme cyPPDK in rice is to modulate carbon metabolism during grain filling Oryza sativa Japonica Group