Submissions for variant NM_000124.4(ERCC6):c.1237C>T (p.Arg413Trp)

gnomAD frequency: 0.00003  dbSNP: rs374490261

Total submissions: 5

Submitter	RCV	SCV	Clinical significance	Condition	Last evaluated	Review status	Method	Comment
Illumina Laboratory Services, Illumina	RCV001107417	SCV001264561	uncertain significance	Age related macular degeneration 5	2018-01-12	criteria provided, single submitter	clinical testing	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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease.
Illumina Laboratory Services, Illumina	RCV001107418	SCV001264562	uncertain significance	Cockayne syndrome type 2	2018-01-12	criteria provided, single submitter	clinical testing	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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease.
Illumina Laboratory Services, Illumina	RCV001107419	SCV001264563	uncertain significance	Cerebrooculofacioskeletal syndrome 1	2018-01-12	criteria provided, single submitter	clinical testing	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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease.
Genetic Services Laboratory, University of Chicago	RCV001819817	SCV002070454	uncertain significance	not specified	2021-12-27	criteria provided, single submitter	clinical testing	DNA sequence analysis of the ERCC6 gene demonstrated a sequence change, c.1237C>T, in exon 5 that results in an amino acid change, p.Arg413Trp. This sequence change has been described in the gnomAD database with a frequency of 0.013% in the South Asian subpopulation (dbSNP rs374490261). The p.Arg413Trp change affects a poorly conserved amino acid residue located in a domain of the ERCC6 protein that is not known to be functional. The p.Arg413Trp substitution appears to be benign using several in-silico pathogenicity prediction tools (SIFT, PolyPhen2, Align GVGD, REVEL). This sequence change does not appear to have been previously described in individuals with ERCC6-related disorders. Due to insufficient evidences and the lack of functional studies, the clinical significance of the p.Arg413Trp change remains unknown at this time.
Labcorp Genetics (formerly Invitae), Labcorp	RCV002556102	SCV003290969	uncertain significance	not provided	2022-08-23	criteria provided, single submitter	clinical testing	This sequence change replaces arginine, which is basic and polar, with tryptophan, which is neutral and slightly polar, at codon 413 of the ERCC6 protein (p.Arg413Trp). This variant is present in population databases (rs374490261, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with ERCC6-related conditions. ClinVar contains an entry for this variant (Variation ID: 879712). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The tryptophan amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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.