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Molecule Parameter List for R.GDP.Gabc

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
R.GDP.Gabc participated asMoleculeSum total ofEnzymeSubstrate of an enzymeProduct of an enzymeSubstrate in ReactionProduct in Reaction
No. of occurrences1000011

Accession and Pathway Details
Accession NameAccession No.Accession TypePathway Link
cAMP_pathway25Network
Shared_Object_cAMP_pathway PKA AC 
Gs 
This is a model of the canonical cAMP signaling pathway:
Ligand->Receptor->G-protein->Cyclase->cAMP->PKA.
It also includes phosphodiesterases to balance out cAMP formation.Bhalla US Methods Enzymol. 2002;345:3-23

R.GDP.Gabc acting as a Molecule in  
cAMP_pathway Network
NameAccession NamePathway NameInitial Conc.
(uM)
Volume
(fL)
Buffered
R.GDP.GabccAMP_pathway
Accession No. : 25
Gs
Pathway No. : 137
01000No
Fraction of R.GDP.Gabc is about 50% of total R, from Fay et al. Biochemistry 30:5066-5075(1991) Since this is not the same receptor, this value is a bit uncertain.

R.GDP.Gabc acting as a Substrate in a reaction in  
cAMP_pathway 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.
NameAccession NamePathway NameKfKbKdtauReagents
L-bind-R.GabccAMP_pathway
Accession No. : 25
Gs
Pathway No. : 137
5
(uM^-1 s^-1)
0.1
(s^-1)
Kd(bf) = 0.02(uM)-Substrate
L
R.GDP.Gabc

Product
L.R.GDP.Gabc
From Seifert et al Mol. Pharmacol 56:348-358 (1999) The EC50 for ISO is about 20 nM.

R.GDP.Gabc acting as a Product in a reaction in  
cAMP_pathway 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.
NameAccession NamePathway NameKfKbKdtauReagents
R-bind-GabccAMP_pathway
Accession No. : 25
Gs
Pathway No. : 137
0.2
(uM^-1 s^-1)
0.1
(s^-1)
Kd(bf) = 0.5(uM)-Substrate
GDP.Gabc
R

Product
R.GDP.Gabc
Receptor binding to Gs. Scale it to the same slow rates described by Fay et al for L.R to L.R.G. From detailed balance, Kd is 50.



Database compilation and code copyright (C) 2022, Upinder S. Bhalla and NCBS/TIFR
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