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Molecule Parameter List for PIP2-PLA2*

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

PIP2-PLA2* participated as	Molecule	Sum total of	Enzyme	Substrate of an enzyme	Product of an enzyme	Substrate in Reaction	Product in Reaction
No. of occurrences	1	0	1	0	0	0	1

Accession and Pathway Details

Accession Name	Accession No.	Accession Type	Pathway Link
MAPK-bistability -fig1c	35	Network	Shared_Object_MAPK-bistability-fig1c,  Sos,  PKC,   MAPK,  PLA2,  Ras,   PDGFR
Model for figure 1c in Bhalla US et al. Science (2002) 297(5583):1018-23. The demo for this figure is available here. This synaptic signaling model is without the MKP-1 feedback, so it is bistable and remains so over long periods.

PIP2-PLA2* acting as a Molecule in  MAPK-bistability-fig1c Network

Name	Accession Name	Pathway Name	Initial Conc. (uM)	Volume (fL)	Buffered
PIP2-PLA2*	MAPK-bistability -fig1c Accession No. : 35	PLA2 Pathway No. : 183	0	1000	No

PIP2-PLA2* acting as an Enzyme in  MAPK-bistability-fig1c Network

Enzyme Molecule / Enzyme Activity	Accession Name	Pathway Name	Km (uM)	kcat (s^-1)	Ratio	Enzyme Type	Reagents
PIP2-PLA2* / kenz	MAPK-bistability -fig1c Accession No. : 35	PLA2 Pathway No. : 183	20	11.04	4	explicit E-S complex	Substrate APC Product AA
Based on Leslie and Channon 1990 BBA 1045:261.

PIP2-PLA2* acting as a Product in a reaction in  MAPK-bistability-fig1c 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.

Name	Accession Name	Pathway Name	Kf	Kb	Kd	tau	Reagents
PIP2-PLA2-act	MAPK-bistability -fig1c Accession No. : 35	PLA2 Pathway No. : 183	0.0012 (uM^-1 s^-1)	0.5 (s^-1)	Kd(bf) = 416.6667(uM)	-	Substrate PLA2-cytosolic temp-PIP2 Product PIP2-PLA2*
Activation of PLA2 by PIP2. From Leslie and Channon 1990 BBA 1045:261 the stimulation of PLA2 activity by high PIP2 is 7x. In this model we don't really expect any PIP2 stimulus.