ClinVar Miner

Submissions for variant NM_005236.3(ERCC4):c.1336G>T (p.Ala446Ser)

gnomAD frequency: 0.00001  dbSNP: rs1298488189
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV001341080 SCV001534924 uncertain significance Xeroderma pigmentosum, group F; Cockayne syndrome; Fanconi anemia complementation group Q 2022-04-20 criteria provided, single submitter clinical testing This sequence change replaces alanine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 446 of the ERCC4 protein (p.Ala446Ser). This variant is present in population databases (no rsID available, gnomAD 0.0009%). This variant has not been reported in the literature in individuals affected with ERCC4-related conditions. ClinVar contains an entry for this variant (Variation ID: 1037862). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.
St. Jude Molecular Pathology, St. Jude Children's Research Hospital RCV003154003 SCV003843138 uncertain significance Fanconi anemia complementation group Q 2022-10-31 criteria provided, single submitter clinical testing The ERCC4 c.1336G>T (p.Ala446Ser) missense change has a maximum subpopulation frequency of 0.0018% in gnomAD v2.1.1 (https://gnomad.broadinstitute.org). The in silico tool REVEL predicts a benign effect on protein function, but to our knowledge this prediction has not been confirmed by functional studies. This variant has been reported as heterozygous in at least one individual with a head and neck squamous cell carcinoma diagnosed before age 50 (PMID: 28678401). To our knowledge, this variant has not been reported in individuals with Fanconi anemia or Xeroderma pigmentosum. In summary, the evidence currently available is insufficient to determine the clinical significance of this variant. It has therefore been classified as of uncertain significance.

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