Two new mutations in the 3' coding region of the glycogen debranching enzyme in a glycogen storage disease type IIIa Ashkenazi Jewish patient.

Published

Journal Article

Glycogen storage disease type III (GSD III) is an autosomal recessive disease caused by the deficiency of glycogen debranching enzyme (AGL). We report the finding of two new mutations in a GSD IIIa Ashkenazi Jewish patient. Both mutations are insertion of an adenine into a stretch of 8 adenines towards the 3' end of the coding region, one at position 3904 (3904insA) in exon 30, the second at position 4214 (4214insA) in exon 32. The mutations cause frameshifts and premature terminations of the glycogen debranching enzyme, the first causing a frameshift at amino acid 1304, the second causing a frameshift at amino acid 1408 of the total of 1532. These mutations demonstrate the importance of the 125 amino acids at the carboxy-terminus of the debrancher enzyme for its activity and support the suggestion that the putative glycogen binding domain is located in the carboxy-terminus of the AGL. The mutations cause distinctive single-strand conformation polymorphism (SSCP) patterns enabling easy detection.

Full Text

Duke Authors

Cited Authors

  • Parvari, R; Shen, J; Hershkovitz, E; Chen, YT; Moses, SW

Published Date

  • April 1998

Published In

Volume / Issue

  • 21 / 2

Start / End Page

  • 141 - 148

PubMed ID

  • 9584265

Pubmed Central ID

  • 9584265

International Standard Serial Number (ISSN)

  • 0141-8955

Digital Object Identifier (DOI)

  • 10.1023/a:1005343625756

Language

  • eng

Conference Location

  • United States