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Molecule Parameter List for PKA-active

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
PKA-active participated asMoleculeSum total ofEnzymeSubstrate of an enzymeProduct of an enzymeSubstrate in ReactionProduct in Reaction
No. of occurrences1030012

Accession and Pathway Details
Accession NameAccession No.Accession TypePathway Link
  • Synaptic_
    Network
  • 16Network
    Shared_Object_Synaptic_Network PKC PLA2 
    PLCbeta Gq MAPK 
    Ras EGFR Sos 
    PLC_g CaMKII CaM 
    PP1 PP2B PKA 
    AC CaRegulation 
    This model is an annotated version of the synaptic signaling network.
    The primary reference is Bhalla US and Iyengar R. Science (1999) 283(5400):381-7 but several of the model pathways have been updated.
    Bhalla US Biophys J. 2002 Aug;83(2):740-52
    Bhalla US J Comput Neurosci. 2002 Jul-Aug;13(1):49-62

    PKA-active acting as a Molecule in  
    Synaptic_Network Network
    NameAccession NamePathway NameInitial Conc.
    (uM)
    Volume
    (fL)
    Buffered
    PKA-active
  • Synaptic_
    Network

    Accession No. : 16
  • Shared_Object_
    Synaptic_
    Network

    Pathway No. : 70
  • 01000No
    The free catalytic subunit.

    PKA-active acting as an Enzyme in  
    Synaptic_Network Network
     Enzyme Molecule /
    Enzyme Activity
    Accession NamePathway NameKm (uM)kcat (s^-1)RatioEnzyme TypeReagents
    1PKA-active /
    PKA-phosph-GEF
  • Synaptic_
    Network

    Accession No. : 16
  • Shared_Object_
    Synaptic_
    Network

    Pathway No. : 70
  • 7.594explicit E-S complexSubstrate
    inact-GEF

    Product
    inact-GEF*
        This pathway inhibits Ras when cAMP is elevated. See: Hordijk et al JBC 269:5 3534-3538 1994 Burgering et al EMBO J 12:11 4211-4220 1993 The rates are the same as used in PKA-phosph-I1
    2PKA-active /
    PKA-phosph-I1
  • Synaptic_
    Network

    Accession No. : 16
  • Shared_Object_
    Synaptic_
    Network

    Pathway No. : 70
  • 7.594explicit E-S complexSubstrate
    I1

    Product
    I1*
        Numbers from Bramson et al CRC crit rev Biochem 15:2 93-124. They have a huge list of peptide substrates and I have chosen high-ish rates. These consts give too much PKA activity, so lower Vmax 1/3 since Cohen et al FEBS Lett 76:182-86 1977 say rate =30% PKA act on phosphokinase beta.
    3PKA-active /
    phosph-PDE
  • Synaptic_
    Network

    Accession No. : 16
  • Shared_Object_
    Synaptic_
    Network

    Pathway No. : 70
  • 7.594explicit E-S complexSubstrate
    cAMP-PDE

    Product
    cAMP-PDE*
        Same rates as PKA-phosph-I1

    PKA-active acting as a Substrate in a reaction in  
    Synaptic_Network 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
    inhib-PKA
  • Synaptic_
    Network

    Accession No. : 16
  • PKA
    Pathway No. : 84
    60
    (uM^-1 s^-1)
    1
    (s^-1)
    Kd(bf) = 0.0167(uM)-Substrate
    PKA-active
    PKA-inhibitor

    Product
    inhibited-PKA
    See Doskeland and Ogreid Int J Biochem 13:1-19. Not clear what the rates are, but the reaction has to be fast and it has to have a pretty high affinity. The exact values are not critical under these conditions.

    PKA-active acting as a Product in a reaction in  
    Synaptic_Network 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
    1Release-C1
  • Synaptic_
    Network

    Accession No. : 16
  • PKA
    Pathway No. : 84
    60
    (s^-1)
    18
    (uM^-1 s^-1)
    Kd(cb) = 0.3(uM)-Substrate
    R2C2-cAMP4

    Product
    PKA-active
    R2C-cAMP4
      The complex starts to dissociate and release the catalytic subunit C. This has to be fast, as the activation of PKA by cAMP is also fast.
    2Release-C2
  • Synaptic_
    Network

    Accession No. : 16
  • PKA
    Pathway No. : 84
    60
    (s^-1)
    18
    (uM^-1 s^-1)
    Kd(cb) = 0.3(uM)-Substrate
    R2C-cAMP4

    Product
    PKA-active
    R2-cAMP4
      Second catalytic subunit is now released.



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