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Molecule Parameter List for NO2.sGC_5coord | The statistics table lists the distribution of a molecule acting either as a substrate, product, enzyme or as a molecule within the network.
The text color of a molecule is highlighted by  color. | | Statistics |
Accession and Pathway Details | |
| Accession Name | Accession No. | Accession Type | Pathway Link | | cGMP_regulation | 34 | Network |
Shared_Object_cGMP_regulation, GC, PDE | Though Corbin JD. et al. Eur J Biochem. (2000) 267(9):2760-7 has been mentioned in the citation, this model has been made with inputs from different literature sources, each of which has been mentioned in the notes sections. This model features hydrolysis of cGMP by bovine PDE, phosphorylation of PDE by bovine lung PKG, and activation of bovine lung PKG by cGMP binding. These mechanisms are known to be involved in cGMP level regulation. Rates have been used from different sources and the model has been tested based on Corbin JD. et al., since their work involved measuring the PDE phosphorylation and PDE activity.
On replicating Figures 2, 3 and 4 from their paper, there is approx 30% difference in results but the qualitative shape of the curves is very similar. This might be due to the fact that the Vmax values were used from different literature sources. This might lead to the discrepancy in the numbers in this model. The values shown in this model are near estimated physiological levels.In order to replicate the Figures more closely, we have run additional simulations with concentration terms changed so as to replicate the experimental conditions exactly. |
NO2.sGC_5coord acting as a Molecule in cGMP_regulation Network
| Name | Accession Name | Pathway Name | Initial Conc.
(uM) | Volume
(fL) | Buffered | | NO2.sGC_5coord | cGMP_regulation
Accession No. : 34 | GC
Pathway No. : 177 | 0 | 0.0016667 | No | | This is the 5-coordinate complex of the enzyme sGC. This is also the active form of the enzyme. |
NO2.sGC_5coord acting as a Summed Molecule in cGMP_regulation Network
| Accession Name | Pathway Name | Target | Input | cGMP_regulation
Accession No. : 34 | GC
Pathway No. : 177 | sGCtot | NO.sGC_5coord
NO2.sGC_5coord
| | This is the sumtotal of the sGC activated via two binding mecanisms as reported by Stone and Marletta, 1996, Biochemistry, 35(4):1093-1099. |
NO2.sGC_5coord acting as a Substrate for an Enzyme in cGMP_regulation Network
Enzyme Molecule /
Enzyme Activity | Accession Name | Pathway Name | Km (uM) | kcat (s^-1) | Ratio | Enzyme Type | Reagents | sGC-ppase* /
deph_NO2_sGC | cGMP_regulation
Accession No. : 34 | GC
Pathway No. : 177 | 5 | 1.8 | 4 | explicit E-S complex | Substrate
NO2.sGC_5coord
Product
deph_NO2.sGC
| | similar to deph_NO_sGC.. |
NO2.sGC_5coord acting as a Product in a reaction in cGMP_regulation Network
| Kd is calculated only for second order reactions, like nA+nB <->nC or nA<->nC+nD, where n is number and A,B,C,D are molecules, where as for first order reactions Keq is calculated.
Kd for higher order reaction are not consider. |
| | Name | Accession Name | Pathway Name | Kf | Kb | Kd | tau | Reagents | | 1 | act_sGCslow | cGMP_regulation
Accession No. : 34 | GC
Pathway No. : 177 | 1.6
(s^-1) | 0.02
(s^-1) | Keq = 0.0125(uM) | 0.617sec | Substrate
nonhemebind_int
Product
NO2.sGC_5coord
| | | Rates used directly from Stone and Marletta,1996, Biochemistry, 35(4):1093-1099. | | 2 | phosph_NO2.sGC | cGMP_regulation
Accession No. : 34 | GC
Pathway No. : 177 | 0.6
(s^-1) | 0
(s^-1) | - | - | Substrate
deph_NO2.sGC
Product
NO2.sGC_5coord
| | | Rates fixed based on the ratio of active and inactive forms. |
| Database compilation and code copyright (C) 2022, Upinder S. Bhalla and NCBS/TIFR
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