ClinVar Miner

Submissions for variant NM_052989.3(IFT122):c.2681C>T (p.Ala894Val)

gnomAD frequency: 0.00004  dbSNP: rs376549217
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Illumina Laboratory Services, Illumina RCV000289480 SCV000440839 uncertain significance Cranioectodermal dysplasia 1 2018-01-13 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.
Fulgent Genetics, Fulgent Genetics RCV000289480 SCV002815703 uncertain significance Cranioectodermal dysplasia 1 2022-02-18 criteria provided, single submitter clinical testing
Labcorp Genetics (formerly Invitae), Labcorp RCV000289480 SCV003250224 uncertain significance Cranioectodermal dysplasia 1 2023-07-10 criteria provided, single submitter clinical testing 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. This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 945 of the IFT122 protein (p.Ala945Val). This variant is present in population databases (rs376549217, gnomAD 0.2%). This variant has not been reported in the literature in individuals affected with IFT122-related conditions. ClinVar contains an entry for this variant (Variation ID: 343258). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt IFT122 protein function.

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