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Literature summary extracted from

  • Splittstoesser, S.A.; Splittstoesser, E.E.
    Pyrroline-5-carboxylate reductase from cucurbita cotyledons (1973), Phytochemistry, 12, 1565-1568.
No PubMed abstract available

Activating Compound

EC Number Activating Compound Comment Organism Structure
1.5.1.2 EDTA stimulation of undialyzed enzyme at 30 mM Cucurbita maxima

Inhibitors

EC Number Inhibitors Comment Organism Structure
1.5.1.2 Ag+ 65% inactivation at 0.3 mM Cucurbita maxima
1.5.1.2 ATP 41% inactivation at 1 mM Cucurbita maxima
1.5.1.2 ATP
-
Cucurbita moschata
1.5.1.2 Hg2+ 65% inactivation at 0.3 mM Cucurbita maxima
1.5.1.2 Hg2+
-
Cucurbita moschata
1.5.1.2 NADP+ 43% inactivation at 1 mM Cucurbita maxima
1.5.1.2 NH2OH 92% inactivation at 1 mM Cucurbita maxima
1.5.1.2 NH2OH
-
Cucurbita moschata
1.5.1.2 p-chloromercuribenzoate not Cucurbita maxima
1.5.1.2 p-chloromercuribenzoate not Cucurbita moschata
1.5.1.2 proline 12% inactivation at 50 mM Cucurbita maxima
1.5.1.2 proline
-
Cucurbita moschata

KM Value [mM]

EC Number KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
1.5.1.2 0.06
-
NADH
-
Cucurbita moschata
1.5.1.2 0.09
-
1-pyrroline-5-carboxylate
-
Cucurbita moschata

Localization

EC Number Localization Comment Organism GeneOntology No. Textmining
1.5.1.2 soluble
-
Cucurbita maxima
-
-
1.5.1.2 soluble
-
Cucurbita moschata
-
-

Organism

EC Number Organism UniProt Comment Textmining
1.5.1.2 Cucurbita maxima
-
-
-
1.5.1.2 Cucurbita moschata
-
-
-

Source Tissue

EC Number Source Tissue Comment Organism Textmining
1.5.1.2 cotyledon
-
Cucurbita maxima
-
1.5.1.2 cotyledon
-
Cucurbita moschata
-

Specific Activity [micromol/min/mg]

EC Number Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
1.5.1.2 1.08
-
-
Cucurbita maxima

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
1.5.1.2 1-pyrroline-5-carboxylate + NAD(P)H + H+
-
Cucurbita moschata L-proline + NAD(P)+
-
?
1.5.1.2 1-pyrroline-5-carboxylate + NAD(P)H + H+ reaction is irreversible at pH 7.4, but reversible at pH 10.3 Cucurbita maxima L-proline + NAD(P)+
-
r
1.5.1.2 1-pyrroline-5-carboxylate + NADH + H+
-
Cucurbita moschata L-proline + NAD+
-
r

pH Optimum

EC Number pH Optimum Minimum pH Optimum Maximum Comment Organism
1.5.1.2 7 7.6
-
Cucurbita maxima

Cofactor

EC Number Cofactor Comment Organism Structure
1.5.1.2 NADH preferentially Cucurbita maxima
1.5.1.2 NADH preferentially Cucurbita moschata
1.5.1.2 NADPH
-
Cucurbita maxima
1.5.1.2 NADPH
-
Cucurbita moschata