Cytosolic CSNK1G2 (casein kinase 1, gamma 2) catalyzes the phosphorylation of multiple serine and threonine residues of “CERT” (ceramide transfer protein) already phosphorylated on serine-132 (Tomishige et al. 2009). This reaction has the effect of inhibiting ceramide transport from the endoplasmic reticulum to the Golgi apparatus as multiphospho-CERT is unable to bind ceramides or associate with the Golgi membrane.
Hanada, K, Kusuda, J, Kumagai, K, Tomishige, N, Nishijima, M
protein serine/threonine kinase activity of CSNK1G2 [cytosol]
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