부산대학교 도서관

Germ-line mutations in BRCA2 predispose to breast and ovarian cancer. Mutations are widespread throughout the gene and include disease-causing mutations as frameshift, nonsense, splicing mutations and large genomic rearrangements. However a large number of mutations, including missense, silent and intron variants are of unknown significance. Here, we describe the functional characterization of a silent mutation (nucleotide 744 G [right arrow] A/c.516 G [right arrow] A, Lys172Lys) in exon 6 of BRCA2 in a Danish family with breast and ovarian cancer. Exon trapping analysis showed that the mutation results in skipping of exon 6 and/or both exon 5 and 6, which was verified by RT-PCR analysis on RNA isolated from whole blood of the affected patient. We therefore conclude that the BRCA2 silent mutation Lys172Lys is a disease-causing mutation. Keywords Breast cancer * BRCA2 * Silent mutation * Splicing * Exon trapping * RT-PCR
Introduction Germ-line BRCA2 (MIM# 600185) mutations confer a high risk for breast and ovarian cancer [1]. BRCA2 is involved in several molecular pathways including homologous recombination and cell cycle control [...]