Abstract
Glycogen storage disease type 1 (GSD 1) results from deficiency of the microsomal multicomponent glucose-6-phosphatase system. Malfunction of the catalytic subunit characterises GSD 1a. GSD 1b and GSD 1c are characterised by defective microsomal glucose-6-phosphate or pyrophosphate/phosphate transport, respectively. Recently, a gene encoding a microsomal transporter protein has been found to be mutated in GSD 1b and 1c patients. Here, we report the genomic sequence of the transporter gene and the detection of a homozygous 2-bp deletion (1211delCT) and a homozygous donor splice site mutation (317+1G-->T) in two GSD 1c patients, confirming that GSD 1c is allelic to GSD 1b.
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