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Molecule Parameter List for Ca

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
Ca participated asMoleculeSum total ofEnzymeSubstrate of an enzymeProduct of an enzymeSubstrate in ReactionProduct in Reaction
No. of occurrences1000041

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

Ca acting as a Molecule in  
CaMKIII Network
NameAccession NamePathway NameInitial Conc.
(uM)
Volume
(fL)
Buffered
CaCaMKIII
Accession No. : 90
  • Shared_Object_
    CaMKIII

    Pathway No. : 1093
  • 0.081000No

    Ca 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
    1CaM-Ca3-bind-CaCaMKIII
    Accession No. : 90
    CaM
    Pathway No. : 1094
    0.465
    (uM^-1 s^-1)
    10
    (s^-1)
    Kd(bf) = 21.5051(uM)-Substrate
    Ca
    CaM-Ca3

    Product
    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
    2CaM-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
    3CaM-Ca2-bind-CaCaMKIII
    Accession No. : 90
    CaM
    Pathway No. : 1094
    3.6001
    (uM^-1 s^-1)
    10
    (s^-1)
    Kd(bf) = 2.7777(uM)-Substrate
    Ca
    CaM-Ca2

    Product
    CaM-Ca3
      K3 = 21.5, K4 = 2.8. Assuming that the K4 step happens first, we get kb/kf = 2.8 uM = 1.68e6 so kf =6e-6 assuming kb = 10
    4CaM-Ca-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-Ca

    Product
    CaM-Ca2
      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

    Ca acting as a Product 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
    Ca_diffCaMKIII
    Accession No. : 90
  • Shared_Object_
    CaMKIII

    Pathway No. : 1093
  • 300
    (s^-1)
    300
    (s^-1)
    Keq = 1(uM)0.002secSubstrate
    Ca_sum

    Product
    Ca



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