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Literature summary for 4.1.1.31 extracted from

  • Dong, L.Y.; Masuda, T.; Kawamura, T.; Hata, S.; Izui, K.
    Cloning, expression and characterization of a root-form phosphoenolpyruvate carboxylase from Zea mays: comparison with the C4-form enzyme (1998), Plant Cell Physiol., 39, 865-873.
    View publication on PubMed

Cloned(Commentary)

Cloned (Comment) Organism
root enzyme Zea mays

Inhibitors

Inhibitors Comment Organism Structure
malate the phosphorylated enzyme is less sensitive to malate Zea mays

Metals/Ions

Metals/Ions Comment Organism Structure
phosphate the enzyme from root is phosphorylated by both mammalian cAMP-dependent protein kinase and maize leaf protein kinase, the phosphorylated enzyme is less sensitive to malate Zea mays

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
Phosphoenolpyruvate + CO2 Zea mays three PEPC isoforms: one is the C4-form PEPC, which plays a cardinal role in the initial CO2-fixation of C4 photosynthesis by capturing atmospheric CO2 into C4-dicarboxylic acids, the second one is a C3-housekeeping PEPC, which plays anaplerotic roles by replenishing C4-dicarboxylic acids in the citric acid cycle for synthesis of cell constituents, the root-form PEPC plays various anaplerotic roles, including providing the carbon skeletons for nitrogen assimilation, pH maintenance, and osmolarity regulation ?
-
?

Organism

Organism UniProt Comment Textmining
Zea mays
-
3 enzyme forms: root-form PEPC, C4-form PEPC, C3-housekeeping form PEPC
-

Source Tissue

Source Tissue Comment Organism Textmining
root
-
Zea mays
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
phosphoenolpyruvate + CO2
-
Zea mays phosphate + oxaloacetate
-
?
Phosphoenolpyruvate + CO2 three PEPC isoforms: one is the C4-form PEPC, which plays a cardinal role in the initial CO2-fixation of C4 photosynthesis by capturing atmospheric CO2 into C4-dicarboxylic acids, the second one is a C3-housekeeping PEPC, which plays anaplerotic roles by replenishing C4-dicarboxylic acids in the citric acid cycle for synthesis of cell constituents, the root-form PEPC plays various anaplerotic roles, including providing the carbon skeletons for nitrogen assimilation, pH maintenance, and osmolarity regulation Zea mays ?
-
?

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
8
-
root-form PEPC and C4-form PEPC Zea mays

pH Range

pH Minimum pH Maximum Comment Organism
7 8 pH 7.0: 90% of maximal activity of the root-form PEPC, 40% of maximal activity of the C4-form PEPC Zea mays