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Literature summary for 3.2.1.52 extracted from

  • Geimba, M.P.; Riffel, A.; Brandelli, A.
    Purification and characterization of beta-N-acetylhexosaminidase from the phytopathogenic fungus Bipolaris sorokiniana (1998), J. Appl. Microbiol., 85, 708-714.
    View publication on PubMed

Activating Compound

Activating Compound Comment Organism Structure
Mn2+
-
Bipolaris sorokiniana
Ni2+
-
Bipolaris sorokiniana

Inhibitors

Inhibitors Comment Organism Structure
acetate
-
Bipolaris sorokiniana
Hg2+
-
Bipolaris sorokiniana
N-acetyl-D-galactosamine with 60 mM 45% of activity remains Bipolaris sorokiniana
N-acetyl-D-glucosamine with 60 mM 24% of activity remains Bipolaris sorokiniana
N-acetylglucosamine-6-sulfate with 10 mM 86% of activity remains Bipolaris sorokiniana
N-acetylglucosamine-isothiocyanate with 10 mM 46% of activity remains Bipolaris sorokiniana
N-acetylmannosamine with 10 mM 83% of activity remains Bipolaris sorokiniana
Pb2+
-
Bipolaris sorokiniana

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.081
-
p-nitrophenyl-beta-2-acetamido-2-deoxy-D-glucopyranoside
-
Bipolaris sorokiniana
1.24
-
p-nitrophenyl-beta-2-acetamido-2-deoxy-D-galactopyranoside
-
Bipolaris sorokiniana

Localization

Localization Comment Organism GeneOntology No. Textmining
extracellular
-
Bipolaris sorokiniana
-
-

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
55000
-
SDS-PAGE Bipolaris sorokiniana
120000
-
gel filtration Bipolaris sorokiniana

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
N-acetyl-beta-D-hexosaminides + H2O Bipolaris sorokiniana
-
N-acetyl-D-hexosamines
-
?

Organism

Organism UniProt Comment Textmining
Bipolaris sorokiniana
-
-
-

Purification (Commentary)

Purification (Comment) Organism
70fold Bipolaris sorokiniana

Source Tissue

Source Tissue Comment Organism Textmining
culture filtrate
-
Bipolaris sorokiniana
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
817.8
-
substrate: p-nitrophenyl-beta-2-acetamido-2-deoxy-D-glucopyranoside Bipolaris sorokiniana

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
N-acetyl-beta-D-hexosaminides + H2O
-
Bipolaris sorokiniana N-acetyl-D-hexosamines
-
?
p-nitrophenyl-beta-2-acetamido-2-deoxy-D-galactopyranoside + H2O
-
Bipolaris sorokiniana 2-acetamido-2-deoxy-D-galactose + p-nitrophenol
-
?
p-nitrophenyl-beta-2-acetamido-2-deoxy-D-glucopyranoside + H2O
-
Bipolaris sorokiniana 2-acetamido-2-deoxy-D-glucose + p-nitrophenol
-
?
p-nitrophenyl-beta-D-glucopyranoside + H2O
-
Bipolaris sorokiniana 4-nitrophenol + beta-D-glucose
-
?
p-nitrophenyl-chitobioside + H2O
-
Bipolaris sorokiniana ?
-
?

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
55
-
-
Bipolaris sorokiniana

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
28
-
stable Bipolaris sorokiniana
37
-
25% inactivation after 30 min Bipolaris sorokiniana
55
-
60% inactivation after 30 min, complete inactivation after 120 min Bipolaris sorokiniana

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
4.5 5
-
Bipolaris sorokiniana

pH Stability

pH Stability pH Stability Maximum Comment Organism
4 10 stable, at 37°C Bipolaris sorokiniana