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Literature summary for 3.2.1.67 extracted from

  • Heinrichova, K.; Rexova-Benkova, L.
    Purification and characterization of an extracellular exo-D-galacturonanase of Aspergillus niger (1976), Biochim. Biophys. Acta, 422, 349-356.
    View publication on PubMed

Localization

Localization Comment Organism GeneOntology No. Textmining
extracellular
-
Aspergillus niger
-
-

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
pectic acid + H2O Aspergillus niger
-
D-galacturonide + ?
-
?

Organism

Organism UniProt Comment Textmining
Aspergillus niger
-
-
-

Purification (Commentary)

Purification (Comment) Organism
partially Aspergillus niger

Source Tissue

Source Tissue Comment Organism Textmining

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
1.44
-
digalacturonic acid Aspergillus niger
1.9
-
sodium pectate Aspergillus niger

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
(1,4-alpha-D-galacturonide)2 + H2O
-
Aspergillus niger D-galacturonic acid
-
?
(1,4-alpha-D-galacturonide)4 + H2O substrate of preference Aspergillus niger (1,4-alpha-D-galacturonide)3 + D-galacturonic acid
-
?
(1,4-alpha-D-galacturonide)n + H2O
-
Aspergillus niger D-galacturonate + digalacturonic acid + trigalacturonic acid
-
?
4,5-dehydrogalacturonosyl-alpha-D-trigalacturonic acid + H2O 4,5-unsaturated tetragalacturonic acid Aspergillus niger (1,4-alpha-D-galacturonide)3
-
?
oligo-D-galacturonate + H2O
-
Aspergillus niger D-galacturonic acid
-
?
p-nitrophenyl-alpha-D-galactopyranuronide + H2O cleaves all substrates with 4-deoxy-L-threo-hexo-4-eno-pyranosyluronate unit at the nonreducing end Aspergillus niger D-galacturonic acid + 4-nitrophenol
-
?
pectic acid + H2O
-
Aspergillus niger D-galacturonic acid + ? traces of oligogalacturonic acids found ?
pectic acid + H2O
-
Aspergillus niger D-galacturonide + ?
-
?

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
45
-
pectate Aspergillus niger

Temperature Range [°C]

Temperature Minimum [°C] Temperature Maximum [°C] Comment Organism
30 60
-
Aspergillus niger

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
40
-
not stable above Aspergillus niger

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
5.2
-
digalacturonate Aspergillus niger

pH Stability

pH Stability pH Stability Maximum Comment Organism
5.2
-
-
Aspergillus niger