ClinVar Miner

Submissions for variant NM_006939.4(SOS2):c.811A>G (p.Ser271Gly)

gnomAD frequency: 0.00004  dbSNP: rs775494170
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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 RCV001045013 SCV001208840 uncertain significance Noonan syndrome 9 2023-12-03 criteria provided, single submitter clinical testing This sequence change replaces serine, which is neutral and polar, with glycine, which is neutral and non-polar, at codon 271 of the SOS2 protein (p.Ser271Gly). This variant is present in population databases (rs775494170, gnomAD 0.01%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with SOS2-related conditions. ClinVar contains an entry for this variant (Variation ID: 842576). 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 SOS2 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 RCV004994202 SCV005509529 uncertain significance Cardiovascular phenotype 2024-11-14 criteria provided, single submitter clinical testing The p.S271G variant (also known as c.811A>G), located in coding exon 6 of the SOS2 gene, results from an A to G substitution at nucleotide position 811. The serine at codon 271 is replaced by glycine, an amino acid with similar 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. Based on the available evidence, the clinical significance of this variant remains unclear.

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