ClinVar Miner

Submissions for variant NM_004168.4(SDHA):c.580G>A (p.Asp194Asn)

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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV003812551 SCV004608202 uncertain significance Mitochondrial complex II deficiency, nuclear type 1; Paragangliomas 5 2023-09-12 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. 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. This variant has not been reported in the literature in individuals affected with SDHA-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces aspartic acid, which is acidic and polar, with asparagine, which is neutral and polar, at codon 194 of the SDHA protein (p.Asp194Asn).
Ambry Genetics RCV004366678 SCV005021852 uncertain significance Hereditary cancer-predisposing syndrome 2023-09-25 criteria provided, single submitter clinical testing The p.D194N variant (also known as c.580G>A), located in coding exon 5 of the SDHA gene, results from a G to A substitution at nucleotide position 580. The aspartic acid at codon 194 is replaced by asparagine, an amino acid with highly similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.

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