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Molecule Parameter List for CaMKII-CaM

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

*CaMKII-CaM* participated as	Molecule	Sum total of	Enzyme	Substrate of an enzyme	Product of an enzyme	Substrate in Reaction	Product in Reaction
No. of occurrences	1	2	0	2	1	1	1

Accession and Pathway Details

Accession Name	Accession No.	Accession Type	Pathway Link
AMPAR_CaMKII_ strong_coupling	64	Network	Shared_Object_AMPAR_CaMKII_strong_coupling, CaMKII, CaM, PP1, AMPAR_memb, PP2B, PKA, AC, PP1_PSD, AMPAR
This is a model of tight coupling between the AMPAR trafficking bistability, and the CaMKII autophosphorylation bistability. In this model, the CaMKII activity is self sustaining only when AMPAR is turned on. Further, CaMKII turns on when AMPAR is turned on.

CaMKII-CaM acting as a Molecule in AMPAR_CaMKII_strong_coupling Network

Name	Accession Name	Pathway Name	Initial Conc. (uM)	Volume (fL)	Buffered
CaMKII-CaM	AMPAR_CaMKII_ strong_coupling Accession No. : 64	CaMKII Pathway No. : 272	0	0.09	No

CaMKII-CaM acting as a Summed Molecule in AMPAR_CaMKII_strong_coupling Network

	Accession Nane	Pathway Name	Target	Input
1	AMPAR_CaMKII_ strong_coupling Accession No. : 64	CaMKII Pathway No. : 272	tot_CaM_CaMKII	CaMKII-CaM CaMKII-thr286*-C aM
2	AMPAR_CaMKII_ strong_coupling Accession No. : 64	Shared_Object_ AMPAR_CaMKII_ strong_coupling Pathway No. : 271	tot_CaMKII_cyt	CaMKII-CaM CaMKII-thr286-C aM CaMKII-thr286 CaMKII** CaMK-thr305 CaMKII basal_CaMKII_ cyt

CaMKII-CaM acting as a Substrate for an Enzyme in AMPAR_CaMKII_strong_coupling Network

	Enzyme Molecule / Enzyme Activity	Accession Name	Pathway Name	Km (uM)	kcat (s^-1)	Ratio	Enzyme Type	Reagents
1	tot_CaM_CaMKII / CaM_act_286	AMPAR_CaMKII_ strong_coupling Accession No. : 64	CaMKII Pathway No. : 272	226.998	0.5	4	explicit E-S complex	Substrate CaMKII-CaM Product CaMKII-thr286*-C aM
2	tot_autonomous_ CaMKII / auton_286	AMPAR_CaMKII_ strong_coupling Accession No. : 64	CaMKII Pathway No. : 272	349.987	0.5	4	explicit E-S complex	Substrate CaMKII-CaM Product CaMKII-thr286*-C aM

CaMKII-CaM acting as a Product of an Enzyme in AMPAR_CaMKII_strong_coupling Network

Enzyme Molecule / Enzyme Activity	Accession Name	Pathway Name	Km (uM)	kcat (s^-1)	Ratio	Enzyme Type	Reagents
PP1-active / Deph-thr286	AMPAR_CaMKII_ strong_coupling Accession No. : 64	Shared_Object_ AMPAR_CaMKII_ strong_coupling Pathway No. : 271	5.09905	2.5	4	explicit E-S complex	Substrate CaMKII-thr286-C aM Product* CaMKII-CaM

CaMKII-CaM acting as a Substrate in a reaction in AMPAR_CaMKII_strong_coupling 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
transloc_1	AMPAR_CaMKII_ strong_coupling Accession No. : 64	Shared_Object_ AMPAR_CaMKII_ strong_coupling Pathway No. : 271	0 (#^-1 s^-1)	0 (s^-1)	Not applicable**	-	Substrate CaMKII-CaM NMDAR Product CaMKII-CaM-PSD
Rates to match curve in fig2 from Shen and Meyer, Science 284:162-166(1999), calculated for 6:1 alpha:beta CaMKII heterodimers

** 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

CaMKII-CaM acting as a Product in a reaction in AMPAR_CaMKII_strong_coupling Network

Name	Accession Name	Pathway Name	Kf	Kb	Kd	tau	Reagents
CaMKII-bind-CaM	AMPAR_CaMKII_ strong_coupling Accession No. : 64	CaMKII Pathway No. : 272	49.9997 (uM^-1 s^-1)	5 (s^-1)	Kd(bf) = 0.1(uM)	-	Substrate CaM-Ca4 CaMKII Product CaMKII-CaM
This is tricky. There is some cooperativity here arising from interactions between the subunits of the CAMKII holoenzyme. However, the stoichiometry is 1. Kb/Kf = 6e4 #/cell. Rate is fast (see Hanson et al Neuron 12 943-956 1994) so lets say kb = 10. This gives kf = 1.6667e-4 H&S AnnRev Biochem 92 give tau for dissoc as 0.2 sec at low Ca, 0.4 at high. Low Ca = 100 nM = physiol.

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