Total submissions: 2
| Submitter | RCV | SCV | Clinical significance | Condition | Last evaluated | Review status | Method | Comment |
|---|---|---|---|---|---|---|---|---|
| Invitae | RCV002525294 | SCV000640161 | uncertain significance | Carney-Stratakis syndrome; Pheochromocytoma; Paragangliomas with sensorineural hearing loss; Cowden syndrome 3 | 2023-09-08 | criteria provided, single submitter | clinical testing | This variant has not been reported in the literature in individuals affected with SDHD-related conditions. This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 133 of the SDHD protein (p.Ala133Thr). This variant is not present in population databases (gnomAD no frequency). ClinVar contains an entry for this variant (Variation ID: 465236). 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 SDHD 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 | RCV004024000 | SCV005020201 | uncertain significance | Hereditary cancer-predisposing syndrome | 2023-12-29 | criteria provided, single submitter | clinical testing | The p.A133T variant (also known as c.397G>A), located in coding exon 4 of the SDHD gene, results from a G to A substitution at nucleotide position 397. The alanine at codon 133 is replaced by threonine, an amino acid with similar properties. This amino acid position is conserved. 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. |