Compound heterozygous variants of the COG6 gene in a Chinese patient with deficiency of subunit 6 of the conserved oligomeric Golgi complex (COG6-CDG)

COG6-CDG is a rare autosomal recessive disease of congenital disorders of glycosylation (CDG) caused by deficiency of subunit 6 of the conserved oligomeric Golgi complex (COG6), which is characterized by growth retardation, developmental disability, microcephaly, liver and gastrointestinal disease, recurrent infections and hypohidrosis/hyperthermia. Only eight mutations causing COG6 deficiencies have been described since the first report in 2010. Here, we report the first Chinese patient with COG6-CDG. Utilizing targeted next generation sequencing and Sanger sequencing, we detected compound heterozygous variants (c.1A > G, p.? and c.388C > T, p.(Gln 130*)) of the COG6 gene, both of which were pathogenic. Our study therefore extended the genotype-phenotype relationship of the COG6 gene.