ClinVar

Description

Variant summary: VWF c.1613C>T (p.Pro538Leu) results in a non-conservative amino acid change located in the von Willebrand factor, type D domain (IPR001846) of the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 0.00046 in 1613768 control chromosomes, predominantly at a frequency of 0.013 within the East Asian subpopulation in the gnomAD database, including 10 homozygotes. The relatively high frequency, together with the homozygous occurrences, might indicate a benign nature for this variant. c.1613C>T has been reported in the literature in individuals affected with Von Willebrand Disease (Sadler_2021). These report(s) do not provide unequivocal conclusions about association of the variant with Von Willebrand Disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication have been ascertained in the context of this evaluation (PMID: 33556167). One submitter has cited clinical-significance assessments for this variant to ClinVar after 2014 and has classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as likely benign.