CDKN2A germline splicing mutation affecting both p16ink4 and p14arf RNA processing in a melanoma/neurofibroma kindred
- 7 June 2001
- journal article
- research article
- Published by Wiley in Genes, Chromosomes and Cancer
- Vol. 31 (4), 398-401
- https://doi.org/10.1002/gcc.1159
Abstract
The CDKN2A locus encodes two tumor suppressor proteins, p16ink4 and p14arf, through use of alternative first exons. CDKN2A mutations detected in melanoma families are usually missense or nonsense changes which mainly impair p16ink4 function. Large genomic deletions spanning the entire locus have been observed in two pedigrees with melanomas and nervous tumors. We have detected a novel splice site mutation in a family with melanomas, neurofibromas, and multiple dysplastic nevi. Both alternative mRNAs produced by the mutant allele lacked shared sequences from exon 2, which encodes a substantial portion (>50%) of both p16ink4 and p14arf proteins. The development of neurofibromas can be explained by cooperative effects of combined inactivation of p16ink4 and p14arf or, alternatively, of p14arf alone.Keywords
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