ClinVar Miner

Submissions for variant NM_004168.4(SDHA):c.188A>G (p.Asp63Gly)

dbSNP: rs1553997327
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV000702942 SCV000831819 uncertain significance Mitochondrial complex II deficiency, nuclear type 1; Paragangliomas 5 2024-01-03 criteria provided, single submitter clinical testing This sequence change replaces aspartic acid, which is acidic and polar, with glycine, which is neutral and non-polar, at codon 63 of the SDHA protein (p.Asp63Gly). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with SDHA-related conditions. ClinVar contains an entry for this variant (Variation ID: 579606). 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) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on SDHA 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.
Ambry Genetics RCV002406634 SCV002717395 uncertain significance Hereditary cancer-predisposing syndrome 2023-03-15 criteria provided, single submitter clinical testing The p.D63G variant (also known as c.188A>G), located in coding exon 3 of the SDHA gene, results from an A to G substitution at nucleotide position 188. The aspartic acid at codon 63 is replaced by glycine, an amino acid with similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.

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