ClinVar

Description

Variant summary: CFTR c.1352G>T (p.Gly451Val) results in a non-conservative amino acid change located in the ABC transporter-like, ATP-binding domain (IPR003439) of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant was absent in 244264 control chromosomes. c.1352G>T has been reported in the literature in the heterozygous, presumed compound heterozygous, and complex presumed compound heterozygous (sharing an allele with another rare VUS p.Gly253Arg) states in multiple individuals affected with Cystic Fibrosis and/or CFTR-related conditions (example, McGinness_2005, Petrova_2020, Rueda-Nieto_2022, Ruiz-Cabezas_2019, Shen_2022, Woodall_2021, Woodall_2023). The impact of the complex allele consisting of c.[757G>A;1352G>T] p.[(Gly253Arg;Gly451Val)] may be pathogenic as it has been seen in several individuals affected with cystic fibrosis-spectrum disease with various presumed compound heterozygous pathogenic variants on the second allele (example, Ruiz-Cabezas_2019), however the impact of p.Gly451Val alone cannot be disambiguated. These data indicate that the variant may be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publications have been ascertained in the context of this evaluation (PMID: 16189704, 32429104, 35698092, 30763667, 35858753, 34613844, 37701179). ClinVar contains an entry for this variant (Variation ID: 553569). Based on the evidence outlined above, the variant was classified as VUS-possibly pathogenic.