Reaction: EPM2A dimer dephosphorylates phosphoglycogen-GYG2
- in pathway: Glycogen synthesis
EPM2A (laforin), associated with PPP1R3C (protein phosphatase 1 regulatory subunit 3C, PTG) and phosphoglycogen-GYG2 in a cytosolic glycogen particle, catalyzes the dephosphorylation of phosphoglycogen (Tagliabracci et al. 2007). This reaction is inferred from the activity of EPM2A on phosphoglycogen-GYG1, and from the fact that in the absence of normal EPM2A activity, abnormally phosphorylated forms of both glycogen-GYG1 and glycogen-GYG2 accumulate in cells. The catalytically active form of EPM2A has been shown to be a homodimer (Raththagala et al. 2015; Sankhala et al. 2015).
Reaction - small molecule participants:
Pi [cytosol]
H2O [cytosol]
Reactome.org reaction link: R-HSA-3781011
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Reaction input - small molecules:
water
Reaction output - small molecules:
hydrogenphosphate
Reactome.org link: R-HSA-3781011