Transformation of 5-HPETE to 5-HETE
5-HPETE is reduced by phospholipid hydroperoxide glutathione peroxidase (PHGPx) to the corresponding alcohol, 5-HETE (Suth01).
Contents
Reaction
Chemical equation
Rate equation
Enzyme Parameters
Kms
Value | Units | Species | Notes | Reference |
---|---|---|---|---|
3.00E-01 | Human | Expression Vector: Bioimprited Enzyme - Selenosubtilisin
Enzyme: Glutathione Peroxidase pH: 7 Temperature: 37 |
[1] | |
11.1 ± 2.90E-01 | Human | Expression Vector: E Coli
Enzyme: Wild Type Glutathione Peroxidase Enzyme (Se-hGSTZ1-1) pH: 7 Temperature: 37 |
[2] | |
4.00E-03 | Rat | Expression Vector: Rat Liver Cells
Enzyme: Glutathione Peroxidase pH: 7.4 Temperature: 37 |
[3] |
Mode (mM) | Confidence Interval | Location parameter (µ) | Scale parameter (σ) |
---|---|---|---|
3.19E-01 | 1.02E+03 | 2.54E+00 | 1.92E+00 |
Kmp
This is a “Dependent parameter”, meaning that the log-normal distribution for this parameter was calculated using multivariate distributions (this is discussed in detail here). As a result, no confidence interval factor or literature values were cited for this parameter.
Mode (mM) | Location parameter (µ) | Scale parameter (σ) |
---|---|---|
3.15E-01 | 2.53E+00 | 1.92E+00 |
kcat
Value | Units | Species | Notes | Reference |
---|---|---|---|---|
1170 ± 50 | Human | Expression Vector: Bioimprited Enzyme - Selenosubtilisin
Enzyme: Glutathione Peroxidase pH: 7 Temperature: 37 |
[1] | |
24500 ± 150 | Human | Expression Vector: E Coli
Enzyme: Wild Type Glutathione Peroxidase Enzyme (Se-hGSTZ1-1) pH: 7 Temperature: 37 |
[2] |
Mode (min-1) | Confidence Interval | Location parameter (µ) | Scale parameter (σ) |
---|---|---|---|
2.44E+04 | 4.20E+00 | 1.11E+01 | 9.75E-01 |
Enzyme concentration
Value | Units | Species | Notes | Reference |
---|---|---|---|---|
459 | Human | Expression Vector: Skin
Enzyme: PHGPx pH: 7.5 Temperature: 37 °C |
[4] | |
307 | Human | Expression Vector: Lung
Enzyme: PHGPx pH: 7.5 Temperature: 37 °C |
[4] | |
282 | Human | Expression Vector: Esophagus
Enzyme: PHGPx pH: 7.5 Temperature: 37 °C |
[4] | |
204 | Human | Expression Vector: Gut
Enzyme: PHGPx pH: 7.5 Temperature: 37 °C |
[5] |
Mode (mM) | Confidence Interval | Location parameter (µ) | Scale parameter (σ) |
---|---|---|---|
3.14E+02 | 1.38E+00 | 5.85E+00 | 3.09E-01 |
Keq
Gibbs Free Energy Change | Units | Species | Notes | Reference |
---|---|---|---|---|
(-26.941177) | kcal/mol | Not stated | Estimated
Enzyme: PHGPx Substrate:a hydroperoxy-fatty-acyl-[lipid] Product: a hydroxy-fatty-acyl-[lipid] pH: 7.3 ionic strength: 0.25 |
[6] |
Mode | Confidence Interval | Location parameter (µ) | Scale parameter (σ) |
---|---|---|---|
5.90E+19 | 1.00E+01 | 4.63E+01 | 8.90E-01 |
References
- ↑ 1.0 1.1 Liu L. "Functional mimicry of the active site of glutathione peroxidase by glutathione imprinted selenium-containing protein. Biomacromolecules. 2008 Jan;9(1):363-8. doi: 10.1021/bm7008312. Epub 2007 Dec 29.
- ↑ 2.0 2.1 Zheng K. "A novel selenium-containing glutathione transferase zeta1-1, the activity of which surpasses the level of some native glutathione peroxidases. Int J Biochem Cell Biol. 2008;40(10):2090-7. doi: 10.1016/j.biocel.2008.02.006. Epub 2008 Feb 15.
- ↑ Hiratsuka A. "Subunit Ya-specific glutathione peroxidase activity toward cholesterol 7-hydroperoxides of glutathione S-transferases in cytosols from rat liver and skin. J Biol Chem. 1997 Feb 21;272(8):4763-9.
- ↑ 4.0 4.1 4.2 M. Wilhelm Mass-spectrometry-based draft of the human proteome Nature, 2014 509, 582–587
- ↑ M. Kim A draft map of the human proteome Nature, 2014 509, 575–581
- ↑ Caspi et al 2014, "The MetaCyc database of metabolic pathways and enzymes and the BioCyc collection of Pathway/Genome Databases," Nucleic Acids Research 42:D459-D471