Summary
In the cystic fibrosis (CF) gene, recently cloned, a three base pair deletion (ΔF508) has been identified in a majority of CF patients. This deletion has been found in 80% of CF chromosomes in families from north west Brittany. In order to identify new mutations we have selected 43 chromosomes negative for the three base pair deletion from these families and directly sequenced exon 11 after DNA amplification by the polymerase chain reaction. We have detected a base change (G→A) at the 3′ end of the consensus sequence of intron ten (namely 1717-1). This mutation destroys a splice site in the cystic fibrosis gene which probably produces a mutant allele. This single nucleotide mutation has been reported on two other CF chromosomes.
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Guillermit, H., Fanent, P. & Ferec, C. A 3′ splice site consensus sequence mutation in the cystic fibrosis gene. Hum Genet 85, 450–453 (1990). https://doi.org/10.1007/BF02428306
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DOI: https://doi.org/10.1007/BF02428306