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Literature summary for 3.1.1.11 extracted from

  • Savary, B.; Vasu, P.; Nunez, A.; Cameron, R.
    Identification of thermolabile pectin methylesterases from sweet orange fruit by peptide mass fingerprinting (2010), J. Agric. Food Chem., 58, 12462-12468.
No PubMed abstract available

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
34341
-
x * 34341, isoform PME4, MALDI-TOF mass spectrometry Citrus sinensis
34467
-
x * 34467, isoform PME2, MALDI-TOF mass spectrometry Citrus sinensis
34485
-
x * 34485, isoform PME1, MALDI-TOF mass spectrometry Citrus sinensis
35000
-
x * 35000, isoform PME2, SDS-PAGE Citrus sinensis

Organism

Organism UniProt Comment Textmining
Citrus sinensis
-
-
-
Citrus sinensis P83948 isoform PME3
-
Citrus sinensis Q8GS16 isoform PME4
-

Purification (Commentary)

Purification (Comment) Organism
affinity purification with immobilized pectin methylesterase-inhibitor protein Citrus sinensis

Source Tissue

Source Tissue Comment Organism Textmining
fruit
-
Citrus sinensis
-
fruit isoform PME1 is a minor citrus fruit thermolabile pectin methylesterase Citrus sinensis
-
fruit isoform PME2 is the major thermolabile pectin methylesterase isoenzyme accumulated in citrus pulp tissue Citrus sinensis
-

Substrates and Products (Substrate)

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

Subunits

Subunits Comment Organism
? x * 34341, isoform PME4, MALDI-TOF mass spectrometry Citrus sinensis
? x * 34467, isoform PME2, MALDI-TOF mass spectrometry Citrus sinensis
? x * 34485, isoform PME1, MALDI-TOF mass spectrometry Citrus sinensis
? x * 35000, isoform PME2, SDS-PAGE Citrus sinensis

Synonyms

Synonyms Comment Organism
PME1 isoform Citrus sinensis
PME2 isoform Citrus sinensis
PME3 isoform Citrus sinensis
PME4 isoform Citrus sinensis
thermolabile pectin methylesterase
-
Citrus sinensis
TL-PME
-
Citrus sinensis

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
70
-
following heating of a crude pulp tissue cell wall extract at 70°C, the activity for the purified isoform PME2 is rapidly lost Citrus sinensis

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
5.5 6 in the presence of 1.2% NaCl Citrus sinensis