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Accession Type:
Network
AMPAR_CaMKII_
weak_coupling
Shared_Object_
AMPAR_CaMKII_
weak_coupling
 Molecule
 Enzyme
 Reaction
CaMKII
CaM
PP1
PP2B
PP1_PSD
AMPAR
PKA
AC
AMPAR_memb
PP1_CaMKII_PSDPP1_CaMKII_PSD
CaMKII_PSD

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Reaction List for pathway Shared_Object_AMPAR_CaMKII_weak_coupling (Pathway Number 281)

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 reactions is not considered.
  Name KfKbKdtauSubstrateProduct
1 CaM-Ca3-bind-Cakf
(uM^-1 s^-1)
10
(s^-1)
Kd(bf) = 21.5054(uM)-CaM-Ca3
Ca
CaM-Ca4
  Use K3 = 21.5 uM here from Stemmer and Klee table 3. kb/kf =21.5 * 6e5 so kf = 7.75e-7, kb = 10
2 Ca_stoch_cytkf
(s^-1)
100
(s^-1)
Keq = 1(uM)0.005secCa_control_cyt
Ca
3 Ca_stoch_PSDkf
(s^-1)
100
(s^-1)
Keq = 1(uM)0.005secCa_control_PSD
Ca-PSD
4 endo_constkf
(s^-1)
0.0014
(s^-1)
Not applicable**-GluR23_M
GluR23_I
5 equilibkf
(s^-1)
60
(s^-1)
Not applicable**-CaM-Ca4-PSD
CaM-Ca4
  Diffusional equilibrium between PSD- and cytosolic compartment. According to D. Bary in Cell Movements 2nd ed 2001 D for proteins is 5e-7 cm^2/s giving 10 ms for a translocation of 1 um.
6 Inact-PP1kf
(uM^-1 s^-1)
0.1
(s^-1)
Kd(bf) = 0.0002(uM)-I1*
PP1-active_PSD
PP1-I1*
  K inhib = 1nM from Cohen Ann Rev Bioch 1989, 4 nM from Foukes et al Assume 2 nM. kf /kb = 8.333e-4
7 PKC-stoch-inputkf
(s^-1)
2.5
(s^-1)
Keq = 1(uM)0.2secPKC-control
PKC-active
8 turnoverkf
(s^-1)
1
(s^-1)
Not applicable**-AMPAR_bulk
A_B
  Represents both synthesis and degradation of the receptor. The rate is set to be rather fast for now. The forward rate also includes scaling terms because the AMPAR_bulk is in the dendritic volume of 5e-18. This means that we need to lower Kf to account for the difference in volumes. Effectively Kf is 1/sec, but the scaled version becomes 9e-20/5e-18 = 0.018
** This is a trasport reation between compartments of different volumes. Therefore Kd is not applicable. Please Note Kf, Kb units are in number of molecules instead of concentration.


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