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Literature summary for 3.2.1.24 extracted from

  • Ram, D.; Tulsiani, P.; Touster, O.
    alpha-D-Mannosidase from golgi membranes of rat liver (1978), Methods Enzymol., 50, 500-505.
    View publication on PubMed

Activating Compound

Activating Compound Comment Organism Structure
2-mercaptoethanol
-
Rattus sp.
ATP 25% activation at 1 mM Rattus sp.
bovine serum albumin
-
Rattus sp.
CMP 25% activation at 1 mM Rattus sp.
dithiothreitol
-
Rattus sp.
L-fucose 20% activation at 250 mM Rattus sp.

Inhibitors

Inhibitors Comment Organism Structure
alpha-D-mannopyranose 30% inhibition at 250 mM Rattus sp.
Cu2+ potent inhibitor Rattus sp.
Fe2+ potent inhibitor Rattus sp.
p-chloromercuribenzenesulfonic acid strong inhibition at 1 mM Rattus sp.

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
30
-
p-nitrophenyl-alpha-D-mannopyranoside
-
Rattus sp.

Localization

Localization Comment Organism GeneOntology No. Textmining
Golgi apparatus
-
Rattus sp. 5794
-

Metals/Ions

Metals/Ions Comment Organism Structure
Co2+
-
Rattus sp.
Zn2+
-
Rattus sp.

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
295000
-
gel filtration Rattus sp.

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
glycopeptide + H2O Rattus sp.
-
alpha-D-mannopyranose + ?
-
?
mannopyranosyl-oligosaccharides + H2O Rattus sp. from yeast mannan, a tetrasaccharide terminating in a mannopyranosyl residue linked to C-3 of its neighbour is not hydrolysed alpha-D-mannopyranose + ?
-
?

Organism

Organism UniProt Comment Textmining
Rattus sp.
-
-
-

Posttranslational Modification

Posttranslational Modification Comment Organism
glycoprotein
-
Rattus sp.

Purification (Commentary)

Purification (Comment) Organism
to homogeneity, chromatography steps Rattus sp.

Source Tissue

Source Tissue Comment Organism Textmining
liver
-
Rattus sp.
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
3.1
-
-
Rattus sp.

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
glycopeptide + H2O
-
Rattus sp. alpha-D-mannopyranose + ?
-
?
mannopyranosyl-oligosaccharides + H2O from yeast mannan, a tetrasaccharide terminating in a mannopyranosyl residue linked to C-3 of its neighbour is not hydrolysed Rattus sp. alpha-D-mannopyranose + ?
-
?
p-nitrophenyl-alpha-D-mannopyranoside + H2O
-
Rattus sp. p-nitrophenol + alpha-D-mannopyranose
-
?

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
5.5
-
-
Rattus sp.