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Accession Type:
Network
Osc_Ca_
IP3metabolism
MIPP
CaMKII
CaM
PKC
IP3-3K
Gq
PLCbeta
 Molecule
 Enzyme
 Reaction
134_dephos
145_dephos
IP4-system
IHP-system
1345_dephos
CaRegulation
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Molecule List for pathway PLCbeta (Pathway Number 126)

 Name Initial Conc. (uM) Volume (fL) Buffered
1DAG01000No
    Basal levels of Diacylglycerol in model are 5.06 uM. DAG is pretty nasty to estimate. Data sources are many and varied and sometimes difficult to reconcile. Welsh and Cabot 1987 JCB 35:231-245: DAG degradation Bocckino et al JBC 260(26):14201-14207: hepatocytes stim with vasopressin: 190 uM. Bocckino et al 1987 JBC 262(31):15309-15315: DAG rises from 70 to 200 ng/mg wet weight, approx 150 to 450 uM. Prescott and Majerus 1983 JBC 258:764-769: Platelets: 6 uM. Also see Rittenhouse-Simmons 1979 J Clin Invest 63. Sano et al JBC 258(3):2010-2013: Report a nearly 10 fold rise. Habenicht et al 1981 JBC 256(23)12329-12335: 3T3 cells with PDGF stim: 27 uM Cornell and Vance 1987 BBA 919:23-36: 10x rise from 10 to 100 uM
2PC01000Yes
    Phosphatidylcholine is the main (around 55%) metabolic product of DAG, follwed by PE (around 25%). Ref is Welsh and Cabot, JCB35:231-245(1987)
3PIP21501000Yes
    PIP2 conc: Willars et al; JBC 273 (9) 27.2.98; pp 5037-5046
4PLC0.041000No
    Smrcka et al; Science 251, 15.2.1991, pp804-807
5PLC-Ca01000No
    From Sternweis et al Phil Trans R Soc Lond 1992, also matched by Homma et al. k1 = 1.5e-5, now 4.2e-6 k2 = 70/sec; now 40/sec k3 = 17.5/sec; now 10/sec Note that the wording in Sternweis et al is ambiguous re the Km. Also Smrcka et al; Science 251, 15.2.1991, pp804-807
6PLC-Ca-Gq01000No
    This should really be labelled PLC-Ca-GTP.Gq_alpha This is the most active form of the enzyme.
7PLC-Gq01000No
    from Smrcka et al, 1991 Science 251: 804-807


Pathway Details  Molecule List   Enzyme List   Reaction List  


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