ClinVar Miner

Submissions for variant NM_007055.4(POLR3A):c.3787G>A (p.Ala1263Thr)

gnomAD frequency: 0.00001  dbSNP: rs560414667
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Illumina Laboratory Services, Illumina RCV001104794 SCV001261687 uncertain significance Leukoencephalopathy-ataxia-hypodontia-hypomyelination syndrome 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.
Invitae RCV001856411 SCV002111167 uncertain significance not provided 2021-09-21 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. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). ClinVar contains an entry for this variant (Variation ID: 878320). This variant has not been reported in the literature in individuals affected with POLR3A-related conditions. This variant is present in population databases (rs560414667, ExAC 0.01%). This sequence change replaces alanine with threonine at codon 1263 of the POLR3A protein (p.Ala1263Thr). The alanine residue is highly conserved and there is a small physicochemical difference between alanine and threonine.

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