Characterisation of inherited and sporadic mutations in neurofibromatosis type-1
1994
Neurofibromatosis type-1 (NF-1) is an autosomal dominant disorder, caused by mutations in the NF-1 gene. Mutation analysis in the NF-1 gene is complicated by the large size of the gene, the high mutation rate, and the presence of pseudogenes. By means of the polymerase chain reaction, we have amplified 70% of the NF-1 coding sequence using reverse transcribed mRNA and genomic DNA from 25 unrelated Scottish Caucasian patients. We have used chemical mismatch cleavage analysis and direct sequencing of asymmetrically amplifed PCR products to characterise mutations within the NF-1 gene. Using the above strategy, we detected 10 novel mutations and an intragenic polymorphism with a heterozygosity of approximately 47% in the Scottish population. Of the 10 mutations, 7 are potentially disease causing
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