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Molecule Parameter List for 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
CaM 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
CaMKIII90Network
Shared_Object_CaMKIII CaM 
CaMKIII is activated by Ca2+ and inactivated by S6K. Since CaMKIII inhibits eEF2, the net effect of Ca2+ on elongation is inhibitory and of S6K is excitatory

CaM acting as a Molecule in  
CaMKIII Network
NameAccession NamePathway NameInitial Conc.
(uM)
Volume
(fL)
Buffered
CaMCaMKIII
Accession No. : 90
CaM
Pathway No. : 1094
201000No
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 acting as a Substrate in a reaction in  
CaMKIII 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-bind-CaCaMKIII
Accession No. : 90
CaM
Pathway No. : 1094
8.4846
(uM^-1 s^-1)
8.4853
(s^-1)
Kd(bf) = 1.0001(uM)-Substrate
Ca
CaM

Product
CaM-Ca
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 !) 19 May 2006. Splitting the old CaM-TR2-bind-Ca reaction into two steps, each binding 1 Ca. This improves numerical stability and is conceptually better too. Overall rates are the same, so each kf and kb is the square root of the earlier ones. So kf = 1.125e-4, kb = 8.4853



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