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Nat Med. 2004 May;10(5):518-23. Epub 2004 Apr 25.

Mutation of the COG complex subunit gene COG7 causes a lethal congenital disorder.

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The Burnham Institute, 10901 N. Torrey Pines Road, La Jolla, California 92037, USA.


The congenital disorders of glycosylation (CDG) are characterized by defects in N-linked glycan biosynthesis that result from mutations in genes encoding proteins directly involved in the glycosylation pathway. Here we describe two siblings with a fatal form of CDG caused by a mutation in the gene encoding COG-7, a subunit of the conserved oligomeric Golgi (COG) complex. The mutation impairs integrity of the COG complex and alters Golgi trafficking, resulting in disruption of multiple glycosylation pathways. These cases represent a new type of CDG in which the molecular defect lies in a protein that affects the trafficking and function of the glycosylation machinery.

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