Difference between revisions of "Transformation of PGI2 to 6-K-PGF1α"
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== Parameters == | == Parameters == | ||
− | * [[Transformation of TXA2 to TXB2 | | + | Note that the literature values are the same as * [[Transformation of TXA2 to TXB2 |reaction 6]]. |
+ | |||
+ | == Parameters == | ||
+ | === Association Rate Constant (Kf) === | ||
+ | |||
+ | {|class="wikitable sortable" | ||
+ | |+ style="text-align: left;" | Literature values | ||
+ | |- | ||
+ | ! Value | ||
+ | ! Units | ||
+ | ! Conditions | ||
+ | ! Substrate | ||
+ | ! Reference | ||
+ | |- | ||
+ | |3.7e3 ± 0.1e3 | ||
+ | |M-1 s-1 | ||
+ | |NaCl04 (0.1 - 0.2 M) | ||
+ | Temperature: 25°C | ||
+ | |3 | ||
+ | |<ref name="Ross1982”>[http://pubs.acs.org/doi/pdf/10.1021/ja00370a035 A. Ross "Vinyl epoxide hydrolysis reactions" J. Am. Chem. Soc., 1982, 104 (6), pp 1658–1665]</ref> | ||
+ | |- | ||
+ | |8.7e3 | ||
+ | |M-1 s-1 | ||
+ | |KCl (1 M) | ||
+ | Temperature: 25°C | ||
+ | |3 | ||
+ | |<ref name="Ross1982”>[http://pubs.acs.org/doi/pdf/10.1021/ja00370a035 A. Ross "Vinyl epoxide hydrolysis reactions" J. Am. Chem. Soc., 1982, 104 (6), pp 1658–1665]</ref> | ||
+ | |- | ||
+ | |1.1e4 ± 0.1e4 | ||
+ | |M-1 s-1 | ||
+ | |NaCl04 (0.1 - 0.2 M) | ||
+ | Temperature: 25°C | ||
+ | |4 | ||
+ | |<ref name="Ross1982”>[http://pubs.acs.org/doi/pdf/10.1021/ja00370a035 A. Ross "Vinyl epoxide hydrolysis reactions" J. Am. Chem. Soc., 1982, 104 (6), pp 1658–1665]</ref> | ||
+ | |- | ||
+ | |2.4 e4 | ||
+ | |M-1 s-1 | ||
+ | |KCl (1M) | ||
+ | Temperature: 25°C | ||
+ | |4 | ||
+ | |<ref name="Ross1982”>[http://pubs.acs.org/doi/pdf/10.1021/ja00370a035 A. Ross "Vinyl epoxide hydrolysis reactions" J. Am. Chem. Soc., 1982, 104 (6), pp 1658–1665]</ref> | ||
+ | |- | ||
+ | |3.7e3 ± 0.1e3 | ||
+ | |M-1 s-1 | ||
+ | |NaCl04 (0.1 - 0.2 M) | ||
+ | Temperature: 25°C | ||
+ | |5 | ||
+ | |<ref name="Ross1982”>[http://pubs.acs.org/doi/pdf/10.1021/ja00370a035 A. Ross "Vinyl epoxide hydrolysis reactions" J. Am. Chem. Soc., 1982, 104 (6), pp 1658–1665]</ref> | ||
+ | |- | ||
+ | |3.6 ± 0.2 | ||
+ | |M-1 s-1 | ||
+ | |NaCl04 (0.1 - 0.2 M) | ||
+ | Temperature: 25°C | ||
+ | |6 | ||
+ | |<ref name="Ross1982”>[http://pubs.acs.org/doi/pdf/10.1021/ja00370a035 A. Ross "Vinyl epoxide hydrolysis reactions" J. Am. Chem. Soc., 1982, 104 (6), pp 1658–1665]</ref> | ||
+ | |- | ||
+ | |1.7 ± 0.1 | ||
+ | |M-1 s-1 | ||
+ | |NaCl04 (0.1 - 0.2 M) | ||
+ | Temperature: 25°C | ||
+ | |7 | ||
+ | |<ref name="Ross1982”>[http://pubs.acs.org/doi/pdf/10.1021/ja00370a035 A. Ross "Vinyl epoxide hydrolysis reactions" J. Am. Chem. Soc., 1982, 104 (6), pp 1658–1665]</ref> | ||
+ | |- | ||
+ | |26.7 ± 0.9 | ||
+ | |M-1 s-1 | ||
+ | |NaCl04 (0.1 - 0.2 M) | ||
+ | Temperature: 25°C | ||
+ | |8 | ||
+ | |<ref name="Ross1982”>[http://pubs.acs.org/doi/pdf/10.1021/ja00370a035 A. Ross "Vinyl epoxide hydrolysis reactions" J. Am. Chem. Soc., 1982, 104 (6), pp 1658–1665]</ref> | ||
+ | |- | ||
+ | |35 | ||
+ | |M-1 s-1 | ||
+ | |KCl (1M) | ||
+ | Temperature: 25°C | ||
+ | |8 | ||
+ | |<ref name="Ross1982”>[http://pubs.acs.org/doi/pdf/10.1021/ja00370a035 A. Ross "Vinyl epoxide hydrolysis reactions" J. Am. Chem. Soc., 1982, 104 (6), pp 1658–1665]</ref> | ||
+ | |- | ||
+ | | 2.25 ± 0.12 | ||
+ | | M-1 min-1 | ||
+ | | 25°C, in imidazole buffer and also in phosphate buffers, | ||
+ | | CO2 to H2CO3 | ||
+ | | <ref name="Gibbons1963”>[http://www.jbc.org/content/238/10/3502.full.pdf B. Gibbons "Rate of Hydration of Carbon Dioxide and Dehydration of Carbonic Acid at 25" J Biol Chem. 1963 Oct;238:3502-7]</ref> | ||
+ | |- | ||
+ | |} | ||
+ | |||
+ | {| class="wikitable" | ||
+ | |+ style="text-align: left;" | Description of the reaction 7 Kf distribution | ||
+ | ! Mode (M-1 s-1) !! Confidence Interval !! Location parameter (µ) !! Scale parameter (σ) | ||
+ | |- | ||
+ | | 3.70E+03 || 3.44E+01 || 1.10E+01 || 1.66E+00 | ||
+ | |} | ||
+ | |||
+ | [[Image:23.jpg|none|thumb|500px|The estimated probability distribution for reaction 7 Kf. The value and weight of the literature values used to define the distribution are indicated by an orange dashed line. The x axis is plotted on a log-scale. ]] | ||
+ | |||
+ | === Dissociation Rate Constant (Kr) === | ||
+ | This is a “Dependent parameter”, meaning that the log-normal distribution for this parameter was calculated using multivariate distributions (this is discussed in detail[[Quantification of parameter uncertainty | here]]). As a result, no confidence interval factor or literature values were cited for this parameter. | ||
+ | |||
+ | {| class="wikitable" | ||
+ | |+ style="text-align: left;" | Description of the reaction 7 Kr distribution | ||
+ | ! Mode !! Location parameter (µ) !! Scale parameter (σ) | ||
+ | |- | ||
+ | | 5.28E+01 || 5.63E+00 || 1.29E+00 | ||
+ | |} | ||
+ | |||
+ | [[Image:24.jpg|none|thumb|500px|The estimated probability distribution for reaction 6 Kr. The value and weight of the literature values used to define the distribution are indicated by an orange dashed line. The x axis is plotted on a log-scale. ]] | ||
+ | |||
+ | === Dissociation Constant === | ||
+ | {|class="wikitable sortable" | ||
+ | |+ style="text-align: left;" | Literature values | ||
+ | |- | ||
+ | ! Value | ||
+ | ! Units | ||
+ | ! Conditions | ||
+ | ! Substrate | ||
+ | ! Reference | ||
+ | |- | ||
+ | |0.000038 | ||
+ | |mM | ||
+ | |Temperature: 35°C | ||
+ | Vector:Mosquito | ||
+ | |||
+ | Note: "In solution, it undergoes rapid hydrolysis to form TXB2, a stable but physiologically inactive compound." - therefore they used stable analogues. | ||
+ | |carbocyclic TXA2 (analogue of TXA2) | ||
+ | |<ref name="Alvarenga2010”>[http://journals.plos.org/plosbiology/article/file?id=10.1371/journal.pbio.1000547&type=printable P. H. Alvarenga "The Function and Three-Dimensional Structure of a Thromboxane A2/Cysteinyl Leukotriene-Binding Protein from the Saliva of a Mosquito Vector of the Malaria Parasite" PLoS Biol. 2010 Nov 30;8(11):e1000547. doi: 10.1371/journal.pbio.1000547.]</ref> | ||
+ | |- | ||
+ | |0.00000023 | ||
+ | |mM | ||
+ | |Temperature: 35°C | ||
+ | Vector:Rabbit cultured astrocytes | ||
+ | |||
+ | Note: "In solution, it undergoes rapid hydrolysis to form TXB2, a stable but physiologically inactive compound." - therefore they used stable analogues. | ||
+ | |[3H]IONO NT-126, a TXA z antagonist, | ||
+ | |<ref name="Nakahata1992”>[http://ac.els-cdn.com/S0006899310800137/1-s2.0-S0006899310800137-main.pdf?_tid=b2ab095e-155f-11e7-94f0-00000aab0f26&acdnat=1490888822_58d1d45dc3238dede94e4a2f15cada82 N Nakahata et al. "The Presence of Thromboxane A2 Receptors in Cultured Astrocytes From Rabbit Brain" Brain Res 583 (1-2), 100-104. 1992 Jun 26]</ref> | ||
+ | |- | ||
+ | |1500 ± 500 (excluded) | ||
+ | |mM | ||
+ | |Temperature: 25°C | ||
+ | In vitro | ||
+ | |Hydroxysulfamic acid | ||
+ | [[File:HSA.PNG |center|500px]] | ||
+ | |<ref name="Littlejohn1989”>[http://www.nrcresearchpress.com/doi/pdf/10.1139/v89-243 D. LITTLEJOHN "The dissociation constant and acid hydrolysis rate of hydroxysulfamic acid" Can. J. Chem. 67, 1596 (1989).]</ref> | ||
+ | |- | ||
+ | |[[File:H202.PNG |center|500px]] | ||
+ | |N/A | ||
+ | |Temperature: 20°C | ||
+ | In vitro | ||
+ | |H2O2 | ||
+ | |<ref name="Littlejohn1989”>[http://pubs.rsc.org/-/content/articlepdf/1949/tf/tf9494500224 M. G. EVAN "The dissociation constant and acid hydrolysis rate of hydroxysulfamic acid" Trans. Faraday Soc., 1949,45, 224-230]</ref> | ||
+ | |- | ||
+ | |5.9 E-8 | ||
+ | |N/A | ||
+ | |Oxaliplatin | ||
+ | |[[File:Oxaliplatin.PNG |center|500px]] | ||
+ | |<ref name="Jerremalm”>[http://www.sciencedirect.com/science/article/pii/S0022354916311649 Elin Jerremalm "Hydrolysis of Oxaliplatin—Evaluation of the Acid Dissociation Constant for the Oxalato Monodentate Complex" Journal of Pharmaceutical Sciences Volume 92, Issue 2, February 2003, Pages 436–438]</ref> | ||
+ | |- | ||
+ | |} | ||
+ | |||
+ | {| class="wikitable" | ||
+ | |+ style="text-align: left;" | Description of the reaction 7 KD distribution | ||
+ | ! Mode (M-1 s-1) !! Confidence Interval !! Location parameter (µ) !! Scale parameter (σ) | ||
+ | |- | ||
+ | | 2.35E-07 || 1.76E+04 || -6.86E+00 || 2.90E+00 | ||
+ | |} | ||
+ | |||
+ | [[Image:R7 KD.jpg|none|thumb|500px|The estimated probability distribution for reaction 6 Kr. The value and weight of the literature values used to define the distribution are indicated by an orange dashed line. The x axis is plotted on a log-scale. ]] | ||
== Related Reactions == | == Related Reactions == | ||
* [[Transformation of PGH2 to PGI2 |Transformation of PGH2 to PGI2]] | * [[Transformation of PGH2 to PGI2 |Transformation of PGH2 to PGI2]] |
Revision as of 08:46, 15 May 2019
Due to ring strain, PGI2 is rapidly hydrolysed to 6-keto-PGF1a. This is a non-enzymatic reaction and results in the formation of a hydroxyl group at C9 and a ketone at C6, by incorporating two hydrogens and one oxygen.
Contents
Reaction
Chemical equation
Rate equation
Parameters
Note that the literature values are the same as * reaction 6.
Parameters
Association Rate Constant (Kf)
Value | Units | Conditions | Substrate | Reference |
---|---|---|---|---|
3.7e3 ± 0.1e3 | M-1 s-1 | NaCl04 (0.1 - 0.2 M)
Temperature: 25°C |
3 | [1] |
8.7e3 | M-1 s-1 | KCl (1 M)
Temperature: 25°C |
3 | [1] |
1.1e4 ± 0.1e4 | M-1 s-1 | NaCl04 (0.1 - 0.2 M)
Temperature: 25°C |
4 | [1] |
2.4 e4 | M-1 s-1 | KCl (1M)
Temperature: 25°C |
4 | [1] |
3.7e3 ± 0.1e3 | M-1 s-1 | NaCl04 (0.1 - 0.2 M)
Temperature: 25°C |
5 | [1] |
3.6 ± 0.2 | M-1 s-1 | NaCl04 (0.1 - 0.2 M)
Temperature: 25°C |
6 | [1] |
1.7 ± 0.1 | M-1 s-1 | NaCl04 (0.1 - 0.2 M)
Temperature: 25°C |
7 | [1] |
26.7 ± 0.9 | M-1 s-1 | NaCl04 (0.1 - 0.2 M)
Temperature: 25°C |
8 | [1] |
35 | M-1 s-1 | KCl (1M)
Temperature: 25°C |
8 | [1] |
2.25 ± 0.12 | M-1 min-1 | 25°C, in imidazole buffer and also in phosphate buffers, | CO2 to H2CO3 | [2] |
Mode (M-1 s-1) | Confidence Interval | Location parameter (µ) | Scale parameter (σ) |
---|---|---|---|
3.70E+03 | 3.44E+01 | 1.10E+01 | 1.66E+00 |
Dissociation Rate Constant (Kr)
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 | Location parameter (µ) | Scale parameter (σ) |
---|---|---|
5.28E+01 | 5.63E+00 | 1.29E+00 |
Dissociation Constant
Value | Units | Conditions | Substrate | Reference |
---|---|---|---|---|
0.000038 | mM | Temperature: 35°C
Vector:Mosquito Note: "In solution, it undergoes rapid hydrolysis to form TXB2, a stable but physiologically inactive compound." - therefore they used stable analogues. |
carbocyclic TXA2 (analogue of TXA2) | [3] |
0.00000023 | mM | Temperature: 35°C
Vector:Rabbit cultured astrocytes Note: "In solution, it undergoes rapid hydrolysis to form TXB2, a stable but physiologically inactive compound." - therefore they used stable analogues. |
[3H]IONO NT-126, a TXA z antagonist, | [4] |
1500 ± 500 (excluded) | mM | Temperature: 25°C
In vitro |
Hydroxysulfamic acid | [5] |
N/A | Temperature: 20°C
In vitro |
H2O2 | [5] | |
5.9 E-8 | N/A | Oxaliplatin | [6] |
Mode (M-1 s-1) | Confidence Interval | Location parameter (µ) | Scale parameter (σ) |
---|---|---|---|
2.35E-07 | 1.76E+04 | -6.86E+00 | 2.90E+00 |
Related Reactions
- Transformation of PGH2 to PGI2
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 A. Ross "Vinyl epoxide hydrolysis reactions" J. Am. Chem. Soc., 1982, 104 (6), pp 1658–1665
- ↑ B. Gibbons "Rate of Hydration of Carbon Dioxide and Dehydration of Carbonic Acid at 25" J Biol Chem. 1963 Oct;238:3502-7
- ↑ P. H. Alvarenga "The Function and Three-Dimensional Structure of a Thromboxane A2/Cysteinyl Leukotriene-Binding Protein from the Saliva of a Mosquito Vector of the Malaria Parasite" PLoS Biol. 2010 Nov 30;8(11):e1000547. doi: 10.1371/journal.pbio.1000547.
- ↑ N Nakahata et al. "The Presence of Thromboxane A2 Receptors in Cultured Astrocytes From Rabbit Brain" Brain Res 583 (1-2), 100-104. 1992 Jun 26
- ↑ 5.0 5.1 D. LITTLEJOHN "The dissociation constant and acid hydrolysis rate of hydroxysulfamic acid" Can. J. Chem. 67, 1596 (1989). Cite error: Invalid
<ref>
tag; name "Littlejohn1989.E2.80.9D" defined multiple times with different content - ↑ Elin Jerremalm "Hydrolysis of Oxaliplatin—Evaluation of the Acid Dissociation Constant for the Oxalato Monodentate Complex" Journal of Pharmaceutical Sciences Volume 92, Issue 2, February 2003, Pages 436–438