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Literature summary for 3.1.8.1 extracted from
- Human paraoxonases (PON1, PON2, and PON3) are lactonases with overlapping and distinct substrate specificities (2005), J. Lipid Res., 46, 1239-1247.
Cloned(Commentary)
| Cloned (Comment) | Organism |
|---|---|
| the recombinant enzyme is expressed in Trichoplusia ni High Five insect cells | Homo sapiens |
Molecular Weight [Da]
| Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
|---|---|---|---|
| 39000 | - |
2 * 39000, recombinant enzyme | Homo sapiens |
| 40000 | - |
2 * 40000, recombinant enzyme, SDS-PAGE | Homo sapiens |
| 91900 | - |
serum PON1, nondenaturing PAGE | Homo sapiens |
| 94900 | - |
recombinant enzyme, nondenaturing PAGE | Homo sapiens |
| 95600 | - |
recombinant PON1, nondenaturing PAGE | Homo sapiens |
Organism
| Organism | UniProt | Comment | Textmining |
|---|---|---|---|
| Homo sapiens | P27169 | - |
- |
| Homo sapiens | Q15166 | - |
- |
Posttranslational Modification
| Posttranslational Modification | Comment | Organism |
|---|---|---|
| glycoprotein | - |
Homo sapiens |
Purification (Commentary)
| Purification (Comment) | Organism |
|---|---|
- |
Homo sapiens |
Source Tissue
| Source Tissue | Comment | Organism | Textmining |
|---|---|---|---|
| blood serum | - |
Homo sapiens | - |
Specific Activity [micromol/min/mg]
| Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
|---|---|---|---|
| 0.205 | - |
pH 8.5, 25°C, substrate: paraoxon, purified recombinant enzyme | Homo sapiens |
| 1.94 | - |
pH 8.5, 25°C, substrate: paraoxon, purified recombinant enzyme | Homo sapiens |
| 40.9 | - |
pH 8.5, 25°C, substrate: chlorpyrifos oxon, purified recombinant enzyme | Homo sapiens |
| 113 | - |
pH 8.5, 25°C, substrate: diazoxon, purified recombinant enzyme | Homo sapiens |
Storage Stability
| Storage Stability | Organism |
|---|---|
| 4°C, 6 months, less than 15% loss of activity | Homo sapiens |
| 4°C, purified recombinant PON1 preparations typically lose about 20% of the arylesterase activity within the first month after purification, compared with less than 10% loss for the enzyme purified from serum. There is no further significant loss of the PON1 activity afterward, suggesting the existence of two pools in the purified PON1, a labile one and a stable one | Homo sapiens |
Substrates and Products (Substrate)
| Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
|---|---|---|---|---|---|---|
| chlorpyrifos oxon + H2O | - |
Homo sapiens | 3,5,6-trichloro-pyridin-2-ol + diethyl phosphate | - |
? |  |
| diazoxon + H2O | - |
Homo sapiens | ? | - |
? | |
| additional information | no activity with chlorpyrifos oxon and diazoxon | Homo sapiens | ? | - |
? | |
| paraoxon + H2O | - |
Homo sapiens | 4-nitrophenol + diethyl phosphate | - |
? | |
Subunits
| Subunits | Comment | Organism |
|---|---|---|
| dimer | 2 * 40000, recombinant enzyme, SDS-PAGE | Homo sapiens |
| dimer | 2 * 39000, recombinant enzyme | Homo sapiens |
Synonyms
| Synonyms | Comment | Organism |
|---|---|---|
| PON1 | - |
Homo sapiens |
| PON3 | - |
Homo sapiens |
Temperature Optimum [°C]
| Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
|---|---|---|---|
| 25 | - |
assay at | Homo sapiens |
pH Optimum
| pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
|---|---|---|---|
| 8.5 | - |
assay at | Homo sapiens |
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Release 2023.1 (January 2023)
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