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Literature summary for 4.1.1.31 extracted from

  • Rao, S.; Reiskind, J.; Bowes, G.
    Light regulation of the photosynthetic phosphoenolpyruvate carboxylase (PEPC) in Hydrilla verticillata (2006), Plant Cell Physiol., 47, 1206-1216.
    View publication on PubMed

Activating Compound

Activating Compound Comment Organism Structure
D-glucose 6-phosphate
-
Hydrilla verticillata

Inhibitors

Inhibitors Comment Organism Structure
malate
-
Hydrilla verticillata

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.79
-
phosphoenolpyruvate C3 extract, light-harvested PEPC in the absence of D-glucose 6-phosphate Hydrilla verticillata
0.92
-
phosphoenolpyruvate C3 extract, dark-harvested PEPC in the absence of D-glucose 6-phosphate Hydrilla verticillata
1.89
-
phosphoenolpyruvate C3 extract, light-harvested PEPC in the presence of 5 mM D-glucose 6-phosphate Hydrilla verticillata
2.26
-
phosphoenolpyruvate C3 extract, dark-harvested PEPC in the presence of 5 mM D-glucose 6-phosphate Hydrilla verticillata

Metals/Ions

Metals/Ions Comment Organism Structure
Mg2+
-
Hydrilla verticillata

Organism

Organism UniProt Comment Textmining
Hydrilla verticillata
-
-
-

Posttranslational Modification

Posttranslational Modification Comment Organism
phosphoprotein
-
Hydrilla verticillata

Source Tissue

Source Tissue Comment Organism Textmining
leaf
-
Hydrilla verticillata
-
additional information phosphoenolpyruvate carboxylase contains two isoforms in Hydrilla verticillata, hvpepc3 and hvpepc4. Transcript expression of hvpepc4 is substantially up-regulated during C4 induction, especially in the light. It is suggested that hvpepc4 encodes the C4 photosynthetic PEPC, and hvpepc3 encodes an anaplerotic form Hydrilla verticillata
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
0.012
-
photosynthetic rate: C3, harvest period: light, + 5 mM malate Hydrilla verticillata
0.016
-
photosynthetic rate: C3, harvest period: dark, + 5 mM malate Hydrilla verticillata
0.019
-
photosynthetic rate: C3, harvest period: light, + 5 mM malate and + 5 mM D-glucose 6-phosphate Hydrilla verticillata
0.023
-
photosynthetic rate: C3, harvest period: light, control Hydrilla verticillata
0.027
-
photosynthetic rate: C3, harvest period: dark, control Hydrilla verticillata
0.028
-
photosynthetic rate: C3, harvest period: dark, + 5 mM malate and + 5 mM D-glucose 6-phosphate Hydrilla verticillata
0.052
-
photosynthetic rate: C3, harvest period: light, + 5 mM D-glucose 6-phosphate Hydrilla verticillata
0.067
-
photosynthetic rate: C3, harvest period: dark, + 5 mM D-glucose 6-phosphate Hydrilla verticillata
0.134
-
photosynthetic rate: C3, harvest period: dark, + 5 mM malate Hydrilla verticillata
0.17
-
photosynthetic rate: C4, harvest period: light, + 5 mM malate Hydrilla verticillata
0.213
-
photosynthetic rate: C3, harvest period: dark, control Hydrilla verticillata
0.326
-
photosynthetic rate: C4, harvest period: light, control Hydrilla verticillata
0.374
-
photosynthetic rate: C4, harvest period: light, + 5 mM malate and + 5 mM D-glucose 6-phosphate Hydrilla verticillata
0.433
-
photosynthetic rate: C4, harvest period: light, + 5 mM D-glucose 6-phosphate Hydrilla verticillata
0.449
-
photosynthetic rate: C3, harvest period: dark, + 5 mM malate and + 5 mM D-glucose 6-phosphate Hydrilla verticillata
0.461
-
photosynthetic rate: C3, harvest period: dark, + 5 mM D-glucose 6-phosphate Hydrilla verticillata

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
phosphoenolpyruvate + CO2
-
Hydrilla verticillata phosphate + oxaloacetate
-
?

Synonyms

Synonyms Comment Organism
Hvpepc3
-
Hydrilla verticillata
Hvpepc4
-
Hydrilla verticillata
PEPC
-
Hydrilla verticillata

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
8
-
-
Hydrilla verticillata

IC50 Value

IC50 Value IC50 Value Maximum Comment Organism Inhibitor Structure
0.2
-
harvest period: dark Hydrilla verticillata malate
0.4
-
harvest period: light Hydrilla verticillata malate