rs369508242
Variant summary
Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BS2
The NM_006270.5(RRAS):c.371C>T(p.Thr124Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000242 in 1,614,030 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T124R) has been classified as Uncertain significance.
Frequency
Consequence
NM_006270.5 missense
Scores
Clinical Significance
Conservation
Publications
- Noonan syndrome and Noonan-related syndromeInheritance: AD Classification: STRONG Submitted by: G2P
- Noonan syndromeInheritance: AD Classification: MODERATE, LIMITED Submitted by: ClinGen, Genomics England PanelApp
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ACMG classification
Our verdict: Likely_benign. The variant received -4 ACMG points.
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|
| RRAS | NM_006270.5 | c.371C>T | p.Thr124Met | missense_variant | Exon 4 of 6 | ENST00000246792.4 | NP_006261.1 |
Ensembl
Frequencies
GnomAD3 genomes AF: 0.000112 AC: 17AN: 152202Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.0000358 AC: 9AN: 251130 AF XY: 0.0000147 show subpopulations
GnomAD4 exome AF: 0.0000150 AC: 22AN: 1461828Hom.: 0 Cov.: 32 AF XY: 0.0000110 AC XY: 8AN XY: 727216 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.000112 AC: 17AN: 152202Hom.: 0 Cov.: 32 AF XY: 0.000121 AC XY: 9AN XY: 74352 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
not specified Uncertain:2
- -
The c.371C>T (p.T124M) alteration is located in exon 4 (coding exon 4) of the RRAS gene. This alteration results from a C to T substitution at nucleotide position 371, causing the threonine (T) at amino acid position 124 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -
Noonan syndrome Uncertain:1
This sequence change replaces threonine, which is neutral and polar, with methionine, which is neutral and non-polar, at codon 124 of the RRAS protein (p.Thr124Met). This variant is present in population databases (rs369508242, gnomAD 0.04%). This variant has not been reported in the literature in individuals affected with RRAS-related conditions. ClinVar contains an entry for this variant (Variation ID: 527793). 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. 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. -
Hereditary cancer Uncertain:1
The available evidence is insufficient to conclusively determine the role of this variant. Therefore, it is classified as a Variant of Uncertain Significance. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at