Reaction: PI(4,5)P2 is hydrolysed to I(1,4,5)P3 and DAG by tethered PLC[1] at the plasma membrane
- in pathway: Synthesis of IP3 and IP4 in the cytosol
A group of phospholipase C proteins (“PLC(degh)”) bind to the plasma membrane via their PH domains. These phospholipases hydrolyse phosphatidylinositol 4,5 bisphosphate (PI(4,5)P2) to inositol 1,4,5 trisphosphate (I(1,4,5)P3) and diacylglycerol (DAG). The C2 domains of the enzymes bind to PI(4,5)P2 at the membrane.
The phospholipase C isoforms involved and their corresponding literature references are: phosphoinositide phospholipase C delta-1(PLCD1) (Cheng et al. 1995); epsilon-1 (PLCE1) (Song et al. 2001, Lopez et al. 2001); delta-3 (PLCD3) (Pawelczyk & Matecki 1997); gamma-1 (PLCG1) (Harita et al. 2009, Baldassare et al. 1989); gamma-2 (PLCG2) (Banno et al. 1988); eta-1 (PLCH1) (Hwang et al. 2005); and eta-2 (PLCH2) (Zhou et al 2005).
The phospholipase C isoforms involved and their corresponding literature references are: phosphoinositide phospholipase C delta-1(PLCD1) (Cheng et al. 1995); epsilon-1 (PLCE1) (Song et al. 2001, Lopez et al. 2001); delta-3 (PLCD3) (Pawelczyk & Matecki 1997); gamma-1 (PLCG1) (Harita et al. 2009, Baldassare et al. 1989); gamma-2 (PLCG2) (Banno et al. 1988); eta-1 (PLCH1) (Hwang et al. 2005); and eta-2 (PLCH2) (Zhou et al 2005).
Reaction - small molecule participants:
I(1,4,5)P3 [cytosol]
DAG [plasma membrane]
H2O [cytosol]
PI(4,5)P2 [plasma membrane]
Reactome.org reaction link: R-HSA-1855221
======
Reaction input - small molecules:
water
1-phosphatidyl-1D-myo-inositol 4,5-bisphosphate(5-)
Reaction output - small molecules:
1D-myo-inositol 1,4,5-trisphosphate(6-)
1,2-diacyl-sn-glycerol
Reactome.org link: R-HSA-1855221