Description
This missense variant replaces glutamic acid with lysine at codon 3002 of the BRCA2 protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). Functional studies have reported that this variant impacts BRCA1 function in homology-mediated repair assays and the rescue of Brca2-deficient mouse embryonic stem cells (PMID: 22678057, 22771033, 23108138, 29394989, 29884841, 29988080, 35736817). This variant has been detected in over 20 individuals and families affected with breast, ovarian and pancreatic cancer (PMID: 15876480, 18284688, 20694749, 22678057, 25628955, 25884701, 27223485, 27724927, 30322717, 30415210, 33471991; Leiden Open Variation Database DB-ID BRCA2_000392, 35411189, 36119527). This variant also has been reported in five families with a combined segregation likelihood ratio for pathogenicity of 30.2646 (PMID: 31131967) and is a recurrent mutation in French-Canadian hereditary breast and ovarian cancer families (PMID: 32300229). This variant has not been identified in the general population by the Genome Aggregation Database (gnomAD). Based on the available evidence, this variant is classified as Pathogenic.
# | Sample | Method | Observation |
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Origin | Affected | Number tested | Tissue | Purpose | Method | Individuals | Allele frequency | Families | Co-occurrences |
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1 | germline | unknown | 108544 | not provided | not provided | | 4 | not provided | not provided | not provided |