Aberrant splicing in adult onset glycogen storage disease type II (GSDII): Molecular identification of an IVS1 (-13T→G) mutation in a majority of patients and a novel IVS10 (+1GT→CT) mutation

M. L. Huie, A. S. Chen, S. Tsujino, S. Shanske, S. DiMauro, Andrew G Engel, R. Hirschhorn

Research output: Contribution to journalArticle

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Abstract

Two newly identified splice site mutations (IVS1 -13T→G and IVS10 +1GT→CT) were found in a patient with adult onset of the autosomal recessive disorder glycogen storage disease type II (GSDII). The IVS1 - 13T→G transversion in the acceptor splice site was found on one allele in over two thirds of adult onset GSDII patients studied (28/41), but was not seen in 58 normal or 12 infantile onset GSDII chromosomes. Molecular analysis of cDNA from the index patient and four additional, ethnically different, individuals carrying the IVS1 -13T→G transversion showed splicing out of the first coding exon as well as rare utilization of a cryptic splice site in the exon. An IVS10 +1GT→CT transversion, unique to the index patient, was detected on the second chromosome. The 1VS10 +1GT→CT results in splicing out of exon 10 including part of the enzyme catalytic site. Additionally, a large deletion encompassing exon 18, previously described in four unrelated patients, was also detected in three unrelated adult GSDII patients, two of whom carried the IVS1 -13T→G transversion. The frequency of the IVS1 splice site mutation suggests that detection of this mutation could potentially aid in the diagnosis of the phenotypically variable syndrome of adult onset GSDII. The finding that the -13T→G mutation is a very common mutation in adult onset GSDII patients of varying ethnic and racial backgrounds, suggests that it is either an ancient mutation or confers a selective advantage. Although to our knowledge these are the first splice site mutations to be reported for GSDII, additional splice site mutations are likely and could provide the basis for later onset disease in GSDII.

Original languageEnglish (US)
Pages (from-to)2231-2236
Number of pages6
JournalHuman Molecular Genetics
Volume3
Issue number12
StatePublished - Dec 1994

Fingerprint

Glycogen Storage Disease Type II
Mutation
Exons
RNA Splice Sites
Chromosomes
Chromosome
Glycogen
CDNA
Catalytic Domain
Deletion
Complementary DNA
Disorder
Alleles
Enzymes
Coding
Likely

ASJC Scopus subject areas

  • Genetics
  • Statistics, Probability and Uncertainty
  • Applied Mathematics
  • Public Health, Environmental and Occupational Health
  • Molecular Biology
  • Genetics(clinical)

Cite this

Aberrant splicing in adult onset glycogen storage disease type II (GSDII) : Molecular identification of an IVS1 (-13T→G) mutation in a majority of patients and a novel IVS10 (+1GT→CT) mutation. / Huie, M. L.; Chen, A. S.; Tsujino, S.; Shanske, S.; DiMauro, S.; Engel, Andrew G; Hirschhorn, R.

In: Human Molecular Genetics, Vol. 3, No. 12, 12.1994, p. 2231-2236.

Research output: Contribution to journalArticle

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abstract = "Two newly identified splice site mutations (IVS1 -13T→G and IVS10 +1GT→CT) were found in a patient with adult onset of the autosomal recessive disorder glycogen storage disease type II (GSDII). The IVS1 - 13T→G transversion in the acceptor splice site was found on one allele in over two thirds of adult onset GSDII patients studied (28/41), but was not seen in 58 normal or 12 infantile onset GSDII chromosomes. Molecular analysis of cDNA from the index patient and four additional, ethnically different, individuals carrying the IVS1 -13T→G transversion showed splicing out of the first coding exon as well as rare utilization of a cryptic splice site in the exon. An IVS10 +1GT→CT transversion, unique to the index patient, was detected on the second chromosome. The 1VS10 +1GT→CT results in splicing out of exon 10 including part of the enzyme catalytic site. Additionally, a large deletion encompassing exon 18, previously described in four unrelated patients, was also detected in three unrelated adult GSDII patients, two of whom carried the IVS1 -13T→G transversion. The frequency of the IVS1 splice site mutation suggests that detection of this mutation could potentially aid in the diagnosis of the phenotypically variable syndrome of adult onset GSDII. The finding that the -13T→G mutation is a very common mutation in adult onset GSDII patients of varying ethnic and racial backgrounds, suggests that it is either an ancient mutation or confers a selective advantage. Although to our knowledge these are the first splice site mutations to be reported for GSDII, additional splice site mutations are likely and could provide the basis for later onset disease in GSDII.",
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