ClinVar Miner

Submissions for variant NM_004168.4(SDHA):c.1250A>G (p.Tyr417Cys)

gnomAD frequency: 0.00001  dbSNP: rs528628545
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Invitae RCV000531820 SCV000651364 uncertain significance Mitochondrial complex II deficiency, nuclear type 1; Paragangliomas 5 2024-01-13 criteria provided, single submitter clinical testing This sequence change replaces tyrosine, which is neutral and polar, with cysteine, which is neutral and slightly polar, at codon 417 of the SDHA protein (p.Tyr417Cys). This variant is present in population databases (rs528628545, gnomAD 0.006%). 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: 472314). 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 RCV002413603 SCV002673243 uncertain significance Hereditary cancer-predisposing syndrome 2021-11-18 criteria provided, single submitter clinical testing The p.Y417C variant (also known as c.1250A>G), located in coding exon 9 of the SDHA gene, results from an A to G substitution at nucleotide position 1250. The tyrosine at codon 417 is replaced by cysteine, an amino acid with highly dissimilar properties. This amino acid position is well conserved in available vertebrate species. 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.

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