ClinVar Genomic variation as it relates to human health

MAF >1%

Converted during submission to Benign.

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease.

This variant is associated with the following publications: (PMID: 27884173, 12547705, 24689082, 23588873)

Converted during submission to Benign.

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity.

The p.Tyr214Tyr variant is not expected to have clinical significance because it does not alter an amino acid residue and is not located near a splice junction. It is listed in dbSNP database as coming from a "clinical source" (ID#: rs1800937) with a global minor allele frequency (MAF) of 0.050, being identified in varying frequencies in various ethnic groups from the HapMap project. It has been reported in the literature in 69/1520 proband chromosomes of individuals from HNPCC and HNPCC-like families, as well as in breast cancer families with colorectal and/ or endometrial cancer. It was also reported in 22/1336 control chromosomes evaluated (Charames_2000_11153917, de Abajo_2005_16270383, Dovrat_2005_16341805, Hendriks_2003_12547705, Kolodner_1999_10537275, Perez-Cabornero_2009_19250818, Peterlongo_2003_14520694, Plaschke_2000_10699937, Vahteristo_2005_15805151, Verma_1999_10507723). In addition, the variant was also identified in the UMD database (x66) as a neutral alteration, as well as in the InSiGHT and Exome Server databases. In summary, based on the above information, this variant is classified as Benign.