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Literature summary for 3.1.1.11 extracted from

  • Do Amaral, S.H.; De Assis, S.A.; Oliveira, O.M.M.D.F.
    Partial purification and characterization of pectin methylesterase from orange (Citrus sinensis) CV. Pera-Rio (2005), J. Food Biochem., 29, 367-380.
    View publication on PubMed

Activating Compound

Activating Compound Comment Organism Structure
KCl highest activity at 0.05-0.10 M Citrus sinensis
Na2SO4 highest activity at 0.02-0.05 M Citrus sinensis
NaCl highest activity at 0.15 M Citrus sinensis
NH4Cl highest activity at 0.05 M Citrus sinensis

Application

Application Comment Organism
food industry used for juice clarification and gelation of frozen concentrates, destabilizing agent for pectin material in fruit juices and concentrates Citrus sinensis

Inhibitors

Inhibitors Comment Organism Structure
K2SO4
-
Citrus sinensis
Li2SO4
-
Citrus sinensis
LiCl
-
Citrus sinensis
Na2SO4
-
Citrus sinensis

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
pectin + H2O Citrus sinensis involved in the regulation of the cell wall rigidity, key role in process of fruit ripening methanol + pectate
-
?

Organism

Organism UniProt Comment Textmining
Citrus sinensis
-
cv. Pera-Rio
-

Purification (Commentary)

Purification (Comment) Organism
partial Citrus sinensis

Source Tissue

Source Tissue Comment Organism Textmining
juice
-
Citrus sinensis
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
1.29
-
pH 8.0, no NaCl added Citrus sinensis
1.82
-
pH 8.0, 0.15 M NaCl Citrus sinensis
26.6
-
pH 8.0, purified enzyme Citrus sinensis

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
pectin + H2O citrus pectin Citrus sinensis methanol + pectate
-
?
pectin + H2O involved in the regulation of the cell wall rigidity, key role in process of fruit ripening Citrus sinensis methanol + pectate
-
?

Synonyms

Synonyms Comment Organism
pectin methylesterase
-
Citrus sinensis
PME
-
Citrus sinensis

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
50
-
-
Citrus sinensis

Temperature Range [°C]

Temperature Minimum [°C] Temperature Maximum [°C] Comment Organism
30 70 50% of activity at 30°C, 30% of activity at 70°C Citrus sinensis
80
-
no activity Citrus sinensis

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
50
-
90% of activity remaining after 50 min Citrus sinensis
60
-
45% of activity remaining after 8 min Citrus sinensis
80
-
7.6% of activity remaining after 1 min Citrus sinensis
90
-
complete inactivation within 1 min Citrus sinensis

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
8
-
-
Citrus sinensis

pH Range

pH Minimum pH Maximum Comment Organism
5 10 less than 50% of activity at pH 5 and 10 Citrus sinensis