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Literature summary for 3.1.1.11 extracted from

  • de Assis, S.A.; Martins, A.B.; Oliveira, O.M.
    Purification and characterization of pectin methylesterase from acerola (Malpighia glabra L.) (2007), J. Sci. Food Agric., 87, 1845-1849.
    View publication on PubMed

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.08
-
Pectin pH 8.3, 50°C, isozyme PME2 Malpighia glabra
0.94
-
Pectin pH 8.3, 50°C, isozyme PME1 Malpighia glabra

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
5200
-
isozyme PME2, gel filtration Malpighia glabra
25100
-
isozyme PME1, gel filtration Malpighia glabra

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
pectin + H2O Malpighia glabra
-
methanol + pectate
-
?

Organism

Organism UniProt Comment Textmining
Malpighia glabra
-
i.e. Malpighia punicifolia, two isozymes PME1 and PME2
-

Purification (Commentary)

Purification (Comment) Organism
native isozymes PME1 389fold and PME2 125fold by ammonium sulfate fractionation, anion exchange chromatography, and gel filtration Malpighia glabra

Source Tissue

Source Tissue Comment Organism Textmining
fruit
-
Malpighia glabra
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
66
-
purified isozyme PME2 Malpighia glabra
206
-
purified isozyme PME1 Malpighia glabra

Substrates and Products (Substrate)

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

Synonyms

Synonyms Comment Organism
pectin methylesterase
-
Malpighia glabra
PME
-
Malpighia glabra

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
50
-
assay at Malpighia glabra

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
98
-
purified PME1 specific activity increases by 9.63% after 60 min incubation at 98°C, while purified PME2 retains 66% of its specific activity Malpighia glabra

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
8.3
-
assay at Malpighia glabra