Abstract:
:An autosomal recessive deficiency of acid alpha-glucosidase (GAA), type II glycogenosis, is genetically and clinically heterogeneous. The discovery of an enzyme-inactivating genomic deletion of exon 18 in three unrelated genetic compound patients--two infants and an adult--provided a rare opportunity to analyze the effect of the second mutation in patients who displayed dramatically different phenotypes. A deletion of Lys-903 in one patient and a substitution of Arg for Leu-299 in another resulted in the fatal infantile form. In the adult, a T-to-G base change at position -13 of intron 1 resulted in alternatively spliced transcripts with deletion of exon 2, the location of the start codon. The low level of active enzyme (12% of normal) generated from the leakage of normally spliced mRNA sustained the patient to adult life.
journal_name
Am J Hum Genetjournal_title
American journal of human geneticsauthors
Boerkoel CF,Exelbert R,Nicastri C,Nichols RC,Miller FW,Plotz PH,Raben Nsubject
Has Abstractpub_date
1995-04-01 00:00:00pages
887-97issue
4eissn
0002-9297issn
1537-6605journal_volume
56pub_type
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journal_title:American journal of human genetics
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journal_title:American journal of human genetics
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journal_title:American journal of human genetics
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journal_title:American journal of human genetics
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journal_title:American journal of human genetics
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journal_title:American journal of human genetics
pub_type: 杂志文章
doi:
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journal_title:American journal of human genetics
pub_type: 杂志文章
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journal_title:American journal of human genetics
pub_type: 杂志文章
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journal_title:American journal of human genetics
pub_type: 杂志文章
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