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Mutational analysis of the AGL gene: Five novel mutations in GSD III patients

✍ Scribed by S. Lucchiari; M.A. Donati; D. Melis; M. Filocamo; R. Parini; N. Bresolin; G.P. Comi

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
71 KB
Volume
22
Category
Article
ISSN
1059-7794

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✦ Synopsis

Total or partial lack of glycogen debranching enzyme (GDE or AGL, amylo-1,6-glucosidase, 4-Ξ±-glucanotransferase) is responsible for Glycogen Storage Disease type III (GSDIII), a rare autosomal recessive disorder of glycogen metabolism. The clinical and biochemical features of GSDIII subjects are quite heterogeneous, and this mirrors the genotypephenotype heterogeneity among patients. In this paper, we report the molecular characterisation of five unrelated subjects, four Italian and one Tunisian. The following new mutations are described and confirm the genetic heterogeneity of this disease: p.R864X, p.R428K, c.3911 insA, p.G1087R and c.3512_3549dup + c.3512_3519del. The functional relevance of these mutations is discussed on the basis of the recently acquired knowledge about the boundaries and structures of the two catalytic domains.

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