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Literature summary extracted from

  • Schofield, A.; Paliyath, G.
    Modulation of carotenoid biosynthesis during tomato fruit ripening through phytochrome regulation of phytoene synthase activity (2005), Plant Physiol. Biochem., 43, 1052-1060.
    View publication on PubMed

Activating Compound

EC Number Activating Compound Comment Organism Structure
2.5.1.32 ATP stimulatory to PSY activity above 5 mM Solanum lycopersicum

Inhibitors

EC Number Inhibitors Comment Organism Structure
2.5.1.32 ATP 20 mM, inhibitory effect Solanum lycopersicum
2.5.1.32 Mg2+ 50 mM, inhibitory effect Solanum lycopersicum
2.5.1.32 Triton X-100 0.2%, total inhibition Solanum lycopersicum
2.5.1.32 Tween 20 0.2%, total inhibition Solanum lycopersicum

KM Value [mM]

EC Number KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
2.5.1.32 0.0374
-
geranylgeranyl diphosphate in 400 mM Tris (pH 6.5), 10 mM sodium ascorbate, 5 mM MgCl2, 0.5 mM MnCl2, 3 mM ATP and 0.02 mM FAD Solanum lycopersicum

Metals/Ions

EC Number Metals/Ions Comment Organism Structure
2.5.1.32 Mg2+ 1 mM, 40-50% stimulating effect Solanum lycopersicum
2.5.1.32 additional information Mn2+ does not have any stimulatory effect Solanum lycopersicum

Organism

EC Number Organism UniProt Comment Textmining
2.5.1.32 Solanum lycopersicum P08196
-
-

Purification (Commentary)

EC Number Purification (Comment) Organism
2.5.1.32 Sephadex G-25 gel filtration and ammonium sulfate fractionation Solanum lycopersicum

Source Tissue

EC Number Source Tissue Comment Organism Textmining
2.5.1.32 fruit
-
Solanum lycopersicum
-

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2.5.1.32 geranylgeranyl diphosphate + geranylgeranyl diphosphate
-
Solanum lycopersicum prephytoene diphosphate + diphosphate
-
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Synonyms

EC Number Synonyms Comment Organism
2.5.1.32 PSY
-
Solanum lycopersicum

pH Optimum

EC Number pH Optimum Minimum pH Optimum Maximum Comment Organism
2.5.1.32 6.5 8.5
-
Solanum lycopersicum