Defective DOLK causes DOLK-CDG

Dolichol kinase (DOLK, TMEM15) normally mediates the phosphorylation of dolichol (DCHOL) to form dolichyl phosphate (DOLP) in the ER membrane. DOLP is an important substrate in the synthesis of N- and O-glycosylated proteins and GPI anchors. Defects in DOLK cause congenital disorder of glycosylation type 1m (DOLK-CDG, CDG1m, also known as dolichol kinase deficiency; MIM:610768), a severe mutisystem disorder characterised by under-glycosylated serum glycoproteins. This disorder has a very severe phenotype and death can occur in early life.

Summary from Reactome (R-HSA-4755583), read 2026-09-23.