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Literature summary for 3.2.1.26 extracted from

  • Singh, M.B.; Knox, R.B.
    Invertases of lilium pollen. Characterization and activity during in vitro germination (1984), Plant Physiol., 74, 510-515.
    View publication on PubMedView publication on EuropePMC

Activating Compound

Activating Compound Comment Organism Structure
Cys 1-10 mM, activates Lilium auratum
reduced glutathione activates Lilium auratum

Inhibitors

Inhibitors Comment Organism Structure
fructose 6-phosphate slight inhibition Lilium auratum
PCMB
-
Lilium auratum

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.65
-
sucrose invertase 1 Lilium auratum
0.98
-
sucrose invertase 2 Lilium auratum

Localization

Localization Comment Organism GeneOntology No. Textmining
cell wall invertase 2, enzyme can not released by treatment with detergents or high salt concentrations Lilium auratum 5618
-
cytoplasm invertase 1 Lilium auratum 5737
-

Metals/Ions

Metals/Ions Comment Organism Structure
Co2+ activates Lilium auratum

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
450000
-
gel filtration Lilium auratum

Organism

Organism UniProt Comment Textmining
Lilium auratum
-
-
-

Posttranslational Modification

Posttranslational Modification Comment Organism
glycoprotein invertase 1 is a glycoprotein Lilium auratum

Purification (Commentary)

Purification (Comment) Organism
invertase 1, partial Lilium auratum

Source Tissue

Source Tissue Comment Organism Textmining
pollen
-
Lilium auratum
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
2970
-
-
Lilium auratum

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
melizitose + H2O no activity with melizitose Lilium auratum ?
-
?
raffinose + H2O 5.0% of the activity with sucrose Lilium auratum fructose + melibiose
-
?
stachyose + H2O 2.6% of the activity with sucrose Lilium auratum ?
-
?
sucrose + H2O
-
Lilium auratum D-fructose + D-glucose
-
?

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
50
-
20 min, 60% loss of invertase 1 activity, 8% loss of invertase 2 activity Lilium auratum

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
4
-
invertase 1 Lilium auratum
5.6
-
invertase 2 Lilium auratum

pH Range

pH Minimum pH Maximum Comment Organism
3 5.4 about 65% of maximal activity at pH 3.0 and at pH 5.4, cytoplasmic enzyme Lilium auratum
4.8 7.4 pH 4.8: about 55% of maximal activity, pH 7.4: about 40% of maximal activity, pollen wall enzyme Lilium auratum