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Molecule Parameter List for PLA2*-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
PLA2*-Ca participated asMoleculeSum total ofEnzymeSubstrate of an enzymeProduct of an enzymeSubstrate in ReactionProduct in Reaction
No. of occurrences1010001

Accession and Pathway Details
Accession NameAccession No.Accession TypePathway Link
  • MAPK_MKP1_
    oscillation
    		• 9Network
    Shared_Object_MAPK_MKP1_oscillation,  PKC,  MAPK,  
    PLA2,  Ras 
    This model relates to figure 5 in Bhalla US, Iyengar R. Chaos (2001) 11(1):221-226. It includes the model used for figures 2-4 and also has MKP-1 induction by MAPK activity in the synapse. PP2A is set to 0.16 uM and MKP synthesis is varied from 5x to 40 x basal to get a range of interesting behaviours.

    PLA2*-Ca acting as a Molecule in      MAPK_MKP1_oscillation Network
    NameAccession NamePathway NameInitial Conc.
    (uM)    		Volume
    (fL)    		Buffered
    PLA2*-Ca
  • MAPK_MKP1_
    oscillation
    Accession No. : 9
    		• PLA2
    Pathway No. : 62    		01000No
    Phosphorylated form of PLA2. Still need to hook it up using kinases. PKA: Wightman et al JBC 257 pp6650 1982 PKC: Many refs, eg Gronich et al JBC 263 pp 16645, 1988 but see Lin etal MAPK: Lin et al, Cell 72 pp 269, 1993. Show 3x with MAPK but not PKC alone Do not know if there is a Ca requirement for active phosphorylated state.

    PLA2*-Ca acting as an Enzyme in      MAPK_MKP1_oscillation Network
    Enzyme Molecule /
    Enzyme Activity    		Accession NamePathway NameKm (uM)kcat (s^-1)RatioEnzyme TypeReagents
    PLA2*-Ca /
    kenz
  • MAPK_MKP1_
    oscillation
    Accession No. : 9
    		• PLA2
    Pathway No. : 62    		201204explicit E-S complexSubstrate
    APC

    Product
    AA
    This form should be 3 to 6 times as fast as the Ca-only form. I have scaled by 4x which seems to give a 5x rise. 10x raise Oct 22 12 x oct 24, changed k2 = 4 * k3

    PLA2*-Ca acting as a Product in a reaction in      MAPK_MKP1_oscillation 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
    PLA2*-Ca-act
  • MAPK_MKP1_
    oscillation
    Accession No. : 9
    		• PLA2
    Pathway No. : 62    		6
    (uM^-1 s^-1)    		0.1
    (s^-1)    		Kd(bf) = 0.0167(uM)-Substrate
    Ca
    PLA2*

    Product
    PLA2*-Ca
    To start off, same kinetics as the PLA2-Ca-act direct pathway. Oops ! Missed out the Ca input to this pathway first time round. Let's raise the forward rate about 3x to 5e-6. This will let us reduce the rather high rates we have used for the kenz on PLA2*-Ca. In fact, it may be that the rates are not that different, just that this pathway for getting the PLA2 to the memb is more efficien....


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