ClinVar

Description

Variant summary: FANCA c.2574C>G (p.Ser858Arg) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.01 in 251444 control chromosomes, predominantly at a frequency of 0.032 within the South Asian subpopulation in the gnomAD database, including 26 homozygotes. The observed variant frequency within South Asian control individuals in the gnomAD database is approximately 15 fold of the estimated maximal expected allele frequency for a pathogenic variant in FANCA causing Fanconi Anemia phenotype (0.0022), strongly suggesting that the variant is a benign polymorphism found primarily in populations of South Asian origin. To our knowledge, no experimental evidence demonstrating its impact on protein function have been reported. Ten ClinVar submitters (evaluation after 2014) cite the variant as uncertain significance (n=1), likely benign (n=3), benign (n=4) and pathogenic (n=2). Based on the evidence outlined above, the variant was classified as benign.