rs774939392
Variant summary
Our verdict is Likely benign. Variant got -1 ACMG points: 3P and 4B. PM1PP2BS2
The NM_002834.5(PTPN11):c.931A>G(p.Met311Val) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.00000931 in 1,611,690 control chromosomes in the GnomAD database, with no homozygous occurrence. 3/3 splice prediction tools predict no significant impact on normal splicing. 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. M311T) has been classified as Likely benign.
Frequency
Consequence
NM_002834.5 missense, splice_region
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_benign. Variant got -1 ACMG points.
Transcripts
RefSeq
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
PTPN11 | ENST00000351677.7 | c.931A>G | p.Met311Val | missense_variant, splice_region_variant | Exon 8 of 16 | 1 | NM_002834.5 | ENSP00000340944.3 | ||
PTPN11 | ENST00000635625.1 | c.931A>G | p.Met311Val | missense_variant, splice_region_variant | Exon 8 of 15 | 5 | ENSP00000489597.1 | |||
PTPN11 | ENST00000635652.1 | c.-204A>G | upstream_gene_variant | 3 | ENSP00000489541.1 |
Frequencies
GnomAD3 genomes AF: 0.0000131 AC: 2AN: 152190Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.0000239 AC: 6AN: 251446Hom.: 0 AF XY: 0.0000147 AC XY: 2AN XY: 135894
GnomAD4 exome AF: 0.00000891 AC: 13AN: 1459500Hom.: 0 Cov.: 32 AF XY: 0.00000826 AC XY: 6AN XY: 726250
GnomAD4 genome AF: 0.0000131 AC: 2AN: 152190Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0AN XY: 74362
ClinVar
Submissions by phenotype
not specified Uncertain:2
The M311V variant has been published previously in a patient with a Noonan-spectrum disorder in cis with the PTPN11 Y63C variant (Ezquieta et al., 2012). The authors of this study suggested M311V is a polymorphism based on in silico predictions. The M311V variant was not observed in approximately 6,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. The M311V variant is a conservative amino acid substitution, which is not likely to impact secondary protein structure as these residues share similar properties. This substitution occurs at a position within the tyrosine protein-phosphatase domain where amino acids with similar properties to methionine are tolerated across species. However, in silico analysis is inconsistent in its predictions as to whether or not the variant is damaging to the protein structure/function, and missense variants in nearby residues (N308D/T/S, I309V) have been reported in the Human Gene Mutation Database in association with Noonan syndrome (Stenson et al., 2014), supporting the functional importance of this region of the protein. Therefore, based on the currently available information, it is unclear whether this variant is a pathogenic variant or a rare benign variant. -
Disclaimer: This variant has not undergone full assessment. The following are preliminary notes: in ClinVar -VUS by GeneDx, not in HGMD or Google search; in 7/246208 total chrs in GnomAd -
Juvenile myelomonocytic leukemia;C0410530:Metachondromatosis;C4551484:LEOPARD syndrome 1;C4551602:Noonan syndrome 1 Uncertain:1
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Cardiovascular phenotype Uncertain:1
The p.M311V variant (also known as c.931A>G), located in coding exon 8 of the PTPN11 gene, results from an A to G substitution at nucleotide position 931. The methionine at codon 311 is replaced by valine, an amino acid with highly similar properties. This variant has been detected in cis with a known PTPN11 mutation, p.Y63C (c.188A>G) in several individuals with suspected Noonan syndrome from two unrelated families (Ezquieta B et al. Rev Esp Cardiol (Engl Ed), 2012 May;65:447-55; Collazo J et al. Rev Esp Cardiol (Engl Ed), 2012 Mar; Volume3N1) ).This variant was not reported in population based cohorts in the following databases: Database of Single Nucleotide Polymorphisms (dbSNP), NHLBI Exome Sequencing Project (ESP), and 1000 Genomes Project. In the ESP, this variant was not observed in 6503 samples (13006 alleles) with coverage at this position. This amino acid position is highly conserved in available vertebrate species. 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. -
RASopathy Uncertain:1
This sequence change replaces methionine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 311 of the PTPN11 protein (p.Met311Val). This variant is present in population databases (rs774939392, gnomAD 0.009%). This missense change has been observed in individual(s) with PTPN11-related conditions (PMID: 22465605). ClinVar contains an entry for this variant (Variation ID: 372668). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt PTPN11 protein function with a negative predictive value of 80%. 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. -
PTPN11-related disorder Benign:1
This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at