ClinVar

Description

Variant Summary: The c.1385A>G variant involves the alteration of a non-conserved nucleotide and 2/5 in silico tools predict a benign outcome. The variant was observed in the large and broad cohorts of the ExAC project at an allele frequency of 0.023%, primarily observed in the European (Non-Finnish) cohort at a frequency of 0.041%. These frequencies do not exceed the maximal expected allele frequency for a pathogenic variant in BRCA2 (0.075%). The variant was reported in the literature and databases in individuals who also have pathogenic BRCA1 (n=1) and BRCA2 (n=3) mutations (UMD, BIC, Simard_2007) suggesting a benign nature of the variant. Additionally, the variant was found to not segregate with disease in families tested (3 affected family members did not carry the variant; Gomez Garcia_2009). Functional studies showed the variant performed similarly to wild-type BRCA2 in assays of cellular survival and viability, homologous recombination repair, and genome instability (Wu_2005). Multiple reputable databases and clinical labs all classify the variant as benign/likely benign (Emory Genteics, UMD, ARUP, Ambry Genetics, SCRP, GeneDx, Counsyl) along with publications using multifactorial probability based models (Lindor_2012, Gomez Garcia_2009). All data, including co-segregation, functional assays, co-occurrence and the occurrence of this variant in the control population all support the classification of benign, therefore this variant has been classified as benign.