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Literature summary for 3.2.1.23 extracted from

  • Lee, D.H.; Kang, S.G.; Suh, S.G.; Byun, J.K.
    Purification and characterization of a beta-galactosidase from peach (Prunus persica) (2003), Mol. Cells, 15, 68-74.
    View publication on PubMed

Inhibitors

Inhibitors Comment Organism Structure
Hg2+ 1 mM, complete inhibition Prunus persica
SDS 1 mM, 62% inhibition Prunus persica

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
5.16
-
p-nitrophenyl beta-D-galactopyranoside
-
Prunus persica

Metals/Ions

Metals/Ions Comment Organism Structure
additional information purified enzyme does not require Ca2+, Cu2+, Zn2+ or Mg2+ Prunus persica

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
42000
-
1 * 42000, SDS-PAGE Prunus persica

Organism

Organism UniProt Comment Textmining
Prunus persica
-
cv. Mibackdo
-

Purification (Commentary)

Purification (Comment) Organism
-
Prunus persica

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
0.125
-
-
Prunus persica

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
p-nitrophenyl beta-D-galactopyranoside + H2O
-
Prunus persica p-nitrophenol + beta-D-galactose
-
?

Subunits

Subunits Comment Organism
? 1 * 42000, SDS-PAGE Prunus persica

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
50
-
-
Prunus persica

Temperature Range [°C]

Temperature Minimum [°C] Temperature Maximum [°C] Comment Organism
30 50 30°C: about 40% of maximal activity, 50°C: optimum, 60°C: no activity Prunus persica

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
40
-
10 min, about 25% loss of activity Prunus persica
50
-
10 min, about 40% loss of activity Prunus persica
60
-
10 min, complete inactivation Prunus persica

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
3
-
-
Prunus persica

pH Range

pH Minimum pH Maximum Comment Organism
3 6 pH 2.0: less than 10% of maximal activity, pH 3.0: optimum, pH 5.0: about 80% of maximal activity, pH 6.0: about 30% of maximal activity Prunus persica

pH Stability

pH Stability pH Stability Maximum Comment Organism
3 10 stable Prunus persica