Cell
Volume 62, Issue 1, 13 July 1990, Pages 187-192
Journal home page for Cell

Article
Deletions and a translocation interrupt a cloned gene at the neurofibromatosis type 1 locus

https://doi.org/10.1016/0092-8674(90)90252-AGet rights and content

Abstract

Three new neurofibromatosis type 1 (NF1) mutations have been detected and characterized. Pulsed-field gel and Southern blot analyses reveal the mutations to be deletions of 190, 40, and 11 kb of DNA. The 11 kb deletion does not contain any of the previously characterized genes that lie between two NF1 translocation breakpoints, but it does include a portion of a rodent/human conserved DNA sequence previously shown to span one of the translocation breakpoints. By screening cDNA libraries with the conserved sequence, we identified a number of cDNA clones from the translocation breakpoint region (TBR), one of which hybridizes to an ∼11 kb mRNA. The TBR gene crosses at least one of the chromosome 17 translocation breakpoints found in NF1 patients. Furthermore, the newly characterized NF1 deletions remove internal exons of the TBR gene. Although these mutations might act by compromising regulatory elements affecting some other gene, these findings strongly suggest that the TBR gene is the NF1 gene.

References (24)

  • J.W. Fountain et al.

    Physical mapping of a translocation breakpoint in neurofibromatosis

    Science

    (1989)
  • K.D. Friedman et al.

    Enzymatic amplification of specific cDNA inserts from γ-gt11 libraries

    Nucl. Acids Res.

    (1988)
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