Description
This variant is not present in population databases (gnomAD no frequency). This variant disrupts the p.Gly60 amino acid residue in HRAS. Other variant(s) that disrupt this residue have been observed in individuals with HRAS-related conditions (PMID: 28027064), which suggests that this may be a clinically significant amino acid residue. Experimental studies have shown that this missense change affects HRAS function (PMID: 28139825). 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) performed at Invitae indicates that this missense variant is expected to disrupt HRAS protein function. ClinVar contains an entry for this variant (Variation ID: 40436). This missense change has been observed in individual(s) with clinical features of Costello and Noonan syndrome (PMID: 25914166, 26467218, 28139825, 30732632). In at least one individual the variant was observed to be de novo. This sequence change replaces glycine, which is neutral and non-polar, with aspartic acid, which is acidic and polar, at codon 60 of the HRAS protein (p.Gly60Asp). For these reasons, this variant has been classified as Pathogenic.
# | Sample | Method | Observation |
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Origin | Affected | Number tested | Tissue | Purpose | Method | Individuals | Allele frequency | Families | Co-occurrences |
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1 | germline | unknown | not provided | not provided | not provided | | not provided | not provided | not provided | not provided |