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Molecule Parameter List for PPX

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
PPX participated asMoleculeSum total ofEnzymeSubstrate of an enzymeProduct of an enzymeSubstrate in ReactionProduct in Reaction
No. of occurrences1010011

Accession and Pathway Details
Accession NameAccession No.Accession TypePathway Link
  • Mammalian_cell_
    cycle
  • 85Network
    Growth CELLDIV Rb_grp 
    IE_GRP CycB_Grp Cdc20_Grp 
    Cdh1_grp E2F CycA_Grp 
    CycE_grp Early_Response_Genes Delayed_Response_Genes 
    CycD_Grp 
    This is a fairly complete mass-action reimplementation of the Novak and Tyson mammalian cell cycle model. It is inexact on two counts. First, it replaces many rather abstracted equations with mass action and Michaelis-Menten forms of enzymes. Second, it does not handle the halving of cellular volume at the division point. Within these limitations, the model does most of what the original paper shows including oscillation of the relevant molecules.

    PPX acting as a Molecule in  
    Mammalian_cell_cycle Network
    NameAccession NamePathway NameInitial Conc.
    (uM)
    Volume
    (fL)
    Buffered
    PPX
  • Mammalian_cell_
    cycle

    Accession No. : 85
  • IE_GRP
    Pathway No. : 1072
    1200No
    From the notes on the equations: We assuem that the activity of this phosphatase (in the nucleus, where it opposes the action of CycB/Cdk1) is proportional to translational efficiency epsilon. Hence, when epsilon drops to 05, both kinase and phosphatase acting on IE are halved.

    PPX acting as an Enzyme in  
    Mammalian_cell_cycle Network
    Enzyme Molecule /
    Enzyme Activity
    Accession NamePathway NameKm (uM)kcat (s^-1)RatioEnzyme TypeReagents
    PPX /
    k32
  • Mammalian_cell_
    cycle

    Accession No. : 85
  • IE_GRP
    Pathway No. : 1072
    0.011.84explicit E-S complexSubstrate
    IEP

    Product
    IE
    Represented as k32.[PPx].[IEP] / (J32 + [IEP]) k32 = 1.8 J32 = 0.01

    PPX acting as a Substrate in a reaction in  
    Mammalian_cell_cycle 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
    k34
  • Mammalian_cell_
    cycle

    Accession No. : 85
  • IE_GRP
    Pathway No. : 1072
    0.05
    (s^-1)
    0
    (s^-1)
    --Substrate
    PPX

    Product
    degraded

    PPX acting as a Product in a reaction in  
    Mammalian_cell_cycle 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
    k33
  • Mammalian_cell_
    cycle

    Accession No. : 85
  • IE_GRP
    Pathway No. : 1072
    0.05
    (s^-1)
    0
    (s^-1)
    --Substrate
    AminoAcids

    Product
    PPX



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