ClinVar Miner

Submissions for variant NM_198253.3(TERT):c.1562G>A (p.Arg521His)

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Total submissions: 5
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
CeGaT Center for Human Genetics Tuebingen RCV002293115 SCV002586042 uncertain significance not provided 2022-08-01 criteria provided, single submitter clinical testing TERT: PM2:Supporting, PP2, BP4
Ambry Genetics RCV004558922 SCV002708733 uncertain significance Dyskeratosis congenita 2022-09-12 criteria provided, single submitter clinical testing The p.R521H variant (also known as c.1562G>A), located in coding exon 2 of the TERT gene, results from a G to A substitution at nucleotide position 1562. The arginine at codon 521 is replaced by histidine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.
Labcorp Genetics (formerly Invitae), Labcorp RCV003774979 SCV004576790 uncertain significance Dyskeratosis congenita, autosomal dominant 2; Idiopathic Pulmonary Fibrosis 2023-11-12 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 521 of the TERT protein (p.Arg521His). This variant is present in population databases (no rsID available, gnomAD 0.01%). This variant has not been reported in the literature in individuals affected with TERT-related conditions. ClinVar contains an entry for this variant (Variation ID: 1711599). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Benign"; Align-GVGD: "Not Available". 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.
Baylor Genetics RCV004572126 SCV005052984 uncertain significance Dyskeratosis congenita, autosomal dominant 2 2023-12-20 criteria provided, single submitter clinical testing
GeneDx RCV002293115 SCV005443556 uncertain significance not provided 2024-07-05 criteria provided, single submitter clinical testing Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis indicates that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge

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