Congenital disorders of glycosylation type II

Definition:

Congenital disorders of glycosylation (CDG) are a group of disorders caused by defects in various genes for N-glycan biosynthesis. CDG-II is defined by mutations in genes encoding enzymes in the processing of N-glycans on the glycosylated proteins either late in the endoplasmic reticulum or the Golgi compartments. Multiple subtypes have been identified although the numbers and forms of affected individuals with CDG-I are still much more. In contrast to type I, the type II patients show a more severe psychomotor retardation, no peripheral neuropathy and a cerebellar hypoplasia. According to the serum transferrin glycoform, a portion of CDG-II can be diagnosed. Distinct from CDG-I, the serum trisialo- and asialotransferrin are increased in CDG-II.

References:

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