ClinVar Miner

Submissions for variant NM_052989.3(IFT122):c.1940G>A (p.Arg647His)

gnomAD frequency: 0.00006  dbSNP: rs750301228
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Total submissions: 4
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Illumina Laboratory Services, Illumina RCV001149662 SCV001310640 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.
GeneDx RCV002272401 SCV002558626 uncertain significance not provided 2022-01-31 criteria provided, single submitter clinical testing In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge
Fulgent Genetics, Fulgent Genetics RCV001149662 SCV002778557 uncertain significance Cranioectodermal dysplasia 1 2022-04-28 criteria provided, single submitter clinical testing
Labcorp Genetics (formerly Invitae), Labcorp RCV001149662 SCV003252960 uncertain significance Cranioectodermal dysplasia 1 2022-05-24 criteria provided, single submitter clinical testing This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 698 of the IFT122 protein (p.Arg698His). This variant is present in population databases (rs750301228, gnomAD 0.006%). 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: 902830). 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 histidine 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.

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