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Accession Type:
Network
MAPK_network_
2003
Shared_Object_
MAPK_network_
2003
PKC
PLA2
PLCbeta
Gq
MAPK
Ras
EGFR
Sos
PLC_g
CaMKII
CaM
PP1
PP2B
 Molecule
 Reaction
PKA
AC

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Reaction List for pathway PP2B (Pathway Number 219)

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 Ca-bind-CaNAB10008
(uM^-2 s^-1)
1
(s^-1)
Kd(af) = 0.01(uM)-CaNAB
Ca
Ca
CaNAB-Ca2
  going on the experience with CaM, we put the fast (high affinity) sites first. We only know (Stemmer and Klee) that the affinity is < 70 nM. Assuming 10 nM at first, we get kf = 2.78e-8, kb = 1. Try 20 nM. kf = 7e-9, kb = 1
2 Ca-bind-CaNAB-Ca
2
3.6
(uM^-2 s^-1)
1
(s^-1)
Kd(af) = 0.527(uM)-Ca
Ca
CaNAB-Ca2
CaNAB-Ca4
  This process is probably much more complicated and involves CaM. However, as I can't find detailed info I am bundling this into a single step. Based on Steemer and Klee pg 6863, the Kact is 0.5 uM. kf/kb = 1/(0.5 * 6e5)^2 = 1.11e-11
3 CaM-Ca2-bind-CaN
AB
0.24
(uM^-1 s^-1)
1
(s^-1)
Kd(bf) = 4.1667(uM)-CaNAB-Ca4
CaM-TR2-Ca2
CaMCa2-CANAB
  Disabled. See notes for PP2B7.g
4 CaMCa3-bind-CaNA
B
2.238
(uM^-1 s^-1)
1
(s^-1)
Kd(bf) = 0.4468(uM)-CaM-Ca3
CaNAB-Ca4
CaMCa3-CaNAB
5 CaMCa4-bind-CaNA
B
600
(uM^-1 s^-1)
1
(s^-1)
Kd(bf) = 0.0017(uM)-CaM-Ca4
CaNAB-Ca4
CaMCa4-CaNAB


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