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Open Access

ATM splicing defect

  • Jonathan B Weitzman
Genome Biology20023:spotlight-20020314-01

https://doi.org/10.1186/gb-spotlight-20020314-01

Published: 14 March 2002

Individuals with mutations in the ATM gene develop ataxia-telangiectasia, a neurodegenrative disorder characterized by immunological defects and cancer predisposition. In an Advanced Online Publication from Nature Genetics, Pagani et al. describe a new kind of ATM mutation that leads to an unusual splicing defect (11 March 2002, DOI:10.1038/ng858). The mutant ATM allele contains a four-nucleotide deletion (GTAA) within intron 20. This deletion results in the inclusion of a 65 nucleotide 'cryptic exon' in the ATM mRNA. The ATM sequence, termed intron-splicing processing element (ISPE), is complementary to U1 snRNA. Experiments with a hybrid minigene confirmed the importance of the ISPE sequence; and interaction with U1 snRNA affected the efficiency of intron removal. Introduction of the ISPE sequence into a different genomic context, exon 9 of the cystic fibrosis transmembrane regulator (CFTR) gene, caused exon skipping and splicing defects.

References

  1. The genetic defect in ataxia-telangiectasia.Google Scholar
  2. Nature Genetics, [http://www.nature.com/ng/]

Copyright

© BioMed Central Ltd 2002

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