ClinVar Miner

Submissions for variant NM_006270.5(RRAS):c.49G>T (p.Gly17Trp)

gnomAD frequency: 0.00026  dbSNP: rs373359206
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Total submissions: 3
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV000697940 SCV000826574 uncertain significance Noonan syndrome 2023-06-18 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. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. ClinVar contains an entry for this variant (Variation ID: 575657). This variant has not been reported in the literature in individuals affected with RRAS-related conditions. This variant is present in population databases (rs373359206, gnomAD 0.08%), and has an allele count higher than expected for a pathogenic variant. This sequence change replaces glycine, which is neutral and non-polar, with tryptophan, which is neutral and slightly polar, at codon 17 of the RRAS protein (p.Gly17Trp).
Women's Health and Genetics/Laboratory Corporation of America, LabCorp RCV001824868 SCV002074160 uncertain significance not specified 2022-01-09 criteria provided, single submitter clinical testing Variant summary: RRAS c.49G>T (p.Gly17Trp) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 5.4e-05 in 92070 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. To our knowledge, no occurrence of c.49G>T in individuals affected with Noonan Syndrome And Related Conditions and no experimental evidence demonstrating its impact on protein function have been reported. One clinical diagnostic laboratory has submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation and classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as uncertain significance.
Ambry Genetics RCV001824868 SCV002640676 likely benign not specified 2022-11-08 criteria provided, single submitter clinical testing This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity.

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