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Enzyme List for pathway PLC_g (Pathway Number 321)

 Molecule Name/
Site Name 		Km (uM) kcat (1/s)Ratio
(k2/k3)		Enzyme TypeSubstrate Product
1 Enzyme Activity:
PIP2_hydrolysis

Enzyme Molecule:
Ca.PLC_g		97.2222144explicit E-S complexPIP2
DAG
IP3
  Mainly Homma et al JBC 263:14 1988 pp 6592, but these parms are the Ca-stimulated form. It is not clear whether the enzyme is activated by tyrosine phosphorylation at this point or not. Wahl et al JBC 267:15 10447-10456 1992 say that the Ca_stim and phosph form has 7X higher affinity for substrate than control. This is close to Wahl's figure 7, which I am using as reference.
2 Enzyme Activity:
PIP2_hydrolysis

Enzyme Molecule:
Ca.PLC_g*		19.7917574explicit E-S complexPIP2
DAG
IP3
  Mainly Homma et al JBC 263:14 1988 pp 6592, but these parms are the Ca-stimulated form. It is not clear whether the enzyme is activated by tyrosine phosphorylation at this point or not. Wahl et al JBC 267:15 10447-10456 1992 say that this has 7X higher affinity for substrate than control.
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