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Literature summary for 3.2.1.24 extracted from

  • Kestwal, R.M.; Konozy, E.H.; Hsiao, C.D.; Roque-Barreira, M.C.; Bhide, S.V.
    Characterization of alpha-mannosidase from Erythrina indica seeds and influence of endogenous lectin on its activity (2007), Biochim. Biophys. Acta, 1770, 24-28.
    View publication on PubMed

Activating Compound

Activating Compound Comment Organism Structure
lectin Erythrina indica seed lectin (EiSL) 35% increase alpha-mannosidase in its activity, abolished in presence of lactose Erythrina variegata

Protein Variants

Protein Variants Comment Organism
additional information N-bromosuccinimide added to determine Trp-residues involved in enzyme activity. N-bromosuccinimide modified inactivation is monitored spectrophotometerically Erythrina variegata

Inhibitors

Inhibitors Comment Organism Structure
N-bromosuccinimide N-bromosuccinimide modified inactivation, effect of Trp modification on enzyme activity Erythrina variegata

Metals/Ions

Metals/Ions Comment Organism Structure
Zn2+ alpha mannosidase is Zn2+ dependent Erythrina variegata

Organism

Organism UniProt Comment Textmining
Erythrina variegata
-
alpha-mannosidase from Erythrina indica has N-terminal amino acid sequence as DTQEN
-

Purification (Commentary)

Purification (Comment) Organism
from Erythrina indica seeds by gel filtration and affinity chromatography Erythrina variegata

Source Tissue

Source Tissue Comment Organism Textmining
seed
-
Erythrina variegata
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
4-nitrophenyl-alpha-D-mannopyranoside + H2O able to protect enzyme from quenching of fluorescence Erythrina variegata 4-nitrophenol + alpha-D-mannopyranose
-
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Synonyms

Synonyms Comment Organism
alpha-mannosidase
-
Erythrina variegata

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
50
-
-
Erythrina variegata

Temperature Range [°C]

Temperature Minimum [°C] Temperature Maximum [°C] Comment Organism
30 65 To determine the energy of activation of alpha-mannosidase (23 kJ/mol), Vmax is determined at various temperatures Erythrina variegata

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
4.6
-
-
Erythrina variegata

pH Range

pH Minimum pH Maximum Comment Organism
3 8 fluorescence studies over a pH range show tryptophan in highly hydrophobic environment, pH change does not change the tryptophan environment Erythrina variegata

pH Stability

pH Stability pH Stability Maximum Comment Organism
6
-
activity is abolished above pH 6.0 Erythrina variegata