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Molecule Parameter List for CaM-PSD

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
CaM-PSD participated asMoleculeSum total ofEnzymeSubstrate of an enzymeProduct of an enzymeSubstrate in ReactionProduct in Reaction
No. of occurrences1000010

Accession and Pathway Details
Accession NameAccession No.Accession TypePathway Link
CaMKII_model363Network
Shared_Object_CaMKII_model3 CaMKII CaM 
PP1 PP2B PP1_PSD 
AC PKA 
This is the complete model of CaMKII bistability, model 3. It exhibits bistability in CaMKII activation due to autophosphorylation at the PSD and local saturation of PP1. This version of model 3 includes PKA regulatory input. This has little effect on the deterministic calculations, but the PKA pathway introduces a lot of noise which causes a difference in stochastic runs.

CaM-PSD acting as a Molecule in  
CaMKII_model3 Network
NameAccession NamePathway NameInitial Conc.
(uM)
Volume
(fL)
Buffered
CaM-PSDCaMKII_model3
Accession No. : 63
CaM
Pathway No. : 265
26.33330.01No
There is a LOT of this in the cell: upto 1% of total protein mass. (Alberts et al) Say 25 uM. Meyer et al Science 256 1199-1202 1992 refer to studies saying it is comparable to CaMK levels.

CaM-PSD acting as a Substrate in a reaction in  
CaMKII_model3 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
  • CaM-TR2-bind-Ca-
    PSD
  • CaMKII_model3
    Accession No. : 63
    CaM
    Pathway No. : 265
    72
    (uM^-2 s^-1)
    72
    (s^-1)
    Kd(af) = 1(uM)-Substrate
    Ca-PSD
    Ca-PSD
    CaM-PSD

    Product
    CaM-TR2-Ca2-PSD
    Lets use the fast rate consts here. Since the rates are so different, I am not sure whether the order is relevant. These correspond to the TR2C fragment. We use the Martin et al rates here, plus the Drabicowski binding consts. All are scaled by 3X to cell temp. kf = 2e-10 kb = 72 Stemmer & Klee: K1=.9, K2=1.1. Assume 1.0uM for both. kb/kf=3.6e11. If kb=72, kf = 2e-10 (Exactly the same !)....



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