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Literature summary for 3.2.1.24 extracted from

  • Plant, A.R.; Moore, K.G.
    alpha-D-Mannosidase and alpha-D-galactosidase from protein bodies of Lupinus angustifolius cotyledons (1982), Phytochemistry, 21, 985-989.
No PubMed abstract available

Inhibitors

Inhibitors Comment Organism Structure
Ag+ 97% inhibition at 10 mM Lupinus angustifolius
alpha-conglutin 11% inhibition at saturation Lupinus angustifolius
alpha-D-mannopyranose 29% inhibition at 10 mM Lupinus angustifolius
Cu2+ 10% inhibition at 10 mM, alpha-mannosidase A Lupinus angustifolius
EDTA addition of Zn2+ restores inhibitory effect Lupinus angustifolius
Hg2+ 45% inhibition at 10 mM Lupinus angustifolius

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
1.92
-
p-nitrophenyl-alpha-D-mannopyranoside alpha-mannosidase A Lupinus angustifolius
2.7
-
p-nitrophenyl-alpha-D-mannopyranoside alpha-mannosidase B Lupinus angustifolius

Localization

Localization Comment Organism GeneOntology No. Textmining
protein storage vacuole
-
Lupinus angustifolius 326
-

Metals/Ions

Metals/Ions Comment Organism Structure
Zn2+ maximum activity at 1 mM Lupinus angustifolius

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
300000
-
gel filtration, alpha-mannosidases A and B Lupinus angustifolius

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
alpha-conglutin + H2O Lupinus angustifolius lupin seed storage glycoprotein, not active to beta- or gamma-conglutin alpha-D-mannopyranose + ?
-
?

Organism

Organism UniProt Comment Textmining
Lupinus angustifolius
-
-
-

Purification (Commentary)

Purification (Comment) Organism
to homogeneity, chromatography steps Lupinus angustifolius

Source Tissue

Source Tissue Comment Organism Textmining
cotyledon alpha-mannosidases A and B Lupinus angustifolius
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
1.93
-
alpha-mannosidase B Lupinus angustifolius
15.94
-
alpha-mannosidase A Lupinus angustifolius

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
alpha-conglutin + H2O lupin seed storage glycoprotein, not active to beta- or gamma-conglutin Lupinus angustifolius alpha-D-mannopyranose + ?
-
?
methyl-alpha-D-mannnopyranose + H2O
-
Lupinus angustifolius alpha-D-mannopyranose + methanol
-
?
p-nitrophenyl-alpha-D-mannopyranoside + H2O
-
Lupinus angustifolius p-nitrophenol + alpha-D-mannopyranose
-
?

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
4
-
alpha-mannosidase A Lupinus angustifolius
4.6
-
alpha-mannosidase B Lupinus angustifolius