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Literature summary for 3.2.1.8 extracted from

  • John, M.; Schmidt, B.; Schmidt, J.
    Purification and some properties of five endo-1,4-beta-D-xylanases and a beta-D-xylosidase produced by a strain of Aspergillus niger (1979), Can. J. Biochem., 57, 125-134.
    View publication on PubMed
Search for more literature for 3.2.1.8

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
31000
-
 xylanase II, gel filtration Aspergillus niger
50000
-
 xylanase IA and IB, gel filtration Aspergillus niger

Organism

Organism UniProt Comment Textmining
Aspergillus niger
-
-
-

Purification (Commentary)

Purification (Comment) Organism
xylanases: Ia, Ib, IIA, IIB, IIC and IID Aspergillus niger

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
1,4-beta-D-xylan + H2O larchwood xylan Aspergillus niger additional information
-
 ?

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
50
-
 xylanase II Aspergillus niger
65 80 xylanase IA and IB Aspergillus niger

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
40
-
 15 min, significant inactivation Aspergillus niger
80
-
 15 min, xylanase IA and Ib are rapidly inactivated above, xylanase II is completly inactivated Aspergillus niger

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
4
-
 xylanase IIa, IIB and IIC Aspergillus niger
4 4.5 xylanase Ib Aspergillus niger
5.5 6 xylanase IA Aspergillus niger
6 6.5 xylanase IID Aspergillus niger

pH Range

pH Minimum pH Maximum Comment Organism
3 8 pH 3.0: about 90% of maximal activity, pH 8.0: about 25% of maximal activity, xylanase IB Aspergillus niger
3.5 8 pH 3.5: about 70% of maximal activity, pH 8.0: about 30% of maximal activity, xylanase IA Aspergillus niger