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Literature summary for 3.1.1.11 extracted from

  • Karakus, E.; Pekyardimci, S.
    Immobilization of apricot pectinesterase (Prunus armeniaca L.) on porous glass beads and its characterization (2009), J. Mol. Catal. B, 56, 13-19.
No PubMed abstract available

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.71
-
Pectin immobilized enzyme, at 20°C Prunus armeniaca
0.77
-
Pectin free enzyme, at 20°C Prunus armeniaca

Organism

Organism UniProt Comment Textmining
Prunus armeniaca
-
Malatya apricot
-

Purification (Commentary)

Purification (Comment) Organism
partial purification by ammonium sulfate precipitation and dialysis Prunus armeniaca

Source Tissue

Source Tissue Comment Organism Textmining
pulp
-
Prunus armeniaca
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
5.83
-
crude extract, at 20°C Prunus armeniaca
70.92
-
after 12.2fold purification, at 20°C Prunus armeniaca
2702
-
purified enzyme immobilized onto porous glass beads, at 20°C Prunus armeniaca

Storage Stability

Storage Stability Organism
4°C, enzyme immobilized onto glutaraldehyde-containing amino group functionalized porous glass beads surface, 30 days, retains 50% of its initial activity Prunus armeniaca
4°C, free enzyme, 30 days, retains 25% of its initial activity Prunus armeniaca

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
pectin + H2O
-
Prunus armeniaca methanol + pectate
-
?

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
50
-
immobilized enzyme Prunus armeniaca
60
-
free enzyme Prunus armeniaca

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
70 90 the immobilized pectinesterase retains 35% of its optimum activity whereas the free pectinesterase is 85% active at 70°C, the free and immobilized pectinesterases retain 40% and 30% of their optimum activities at 80°C, free and immobilized pectinesterase enzymes lose about 95% and 80% of their original activities at 90°C for 45 min Prunus armeniaca

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
8
-
immobilized enzyme Prunus armeniaca
9
-
free enzyme Prunus armeniaca

pH Range

pH Minimum pH Maximum Comment Organism
4 9.5
-
Prunus armeniaca