ClinVar Miner

Submissions for variant NM_052989.3(IFT122):c.1576C>T (p.Arg526Cys)

gnomAD frequency: 0.00039  dbSNP: rs149578956
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Total submissions: 5
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Illumina Laboratory Services, Illumina RCV001148108 SCV001308978 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.
Labcorp Genetics (formerly Invitae), Labcorp RCV001148108 SCV002168389 uncertain significance Cranioectodermal dysplasia 1 2022-10-05 criteria provided, single submitter clinical testing This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 577 of the IFT122 protein (p.Arg577Cys). This variant is present in population databases (rs149578956, gnomAD 0.06%). 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: 901925). 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. 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.
Fulgent Genetics, Fulgent Genetics RCV001148108 SCV002778049 uncertain significance Cranioectodermal dysplasia 1 2022-05-27 criteria provided, single submitter clinical testing
Ambry Genetics RCV002557174 SCV003700559 uncertain significance Inborn genetic diseases 2021-09-16 criteria provided, single submitter clinical testing The c.1729C>T (p.R577C) alteration is located in exon 15 (coding exon 15) of the IFT122 gene. This alteration results from a C to T substitution at nucleotide position 1729, causing the arginine (R) at amino acid position 577 to be replaced by a cysteine (C). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear.
GeneDx RCV004720769 SCV005328095 uncertain significance not provided 2023-12-20 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

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