10-87957901-A-G
Variant summary
Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2PP2BP4_Moderate
The NM_000314.8(PTEN):āc.683A>Gā(p.Asn228Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,802 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Consequence
NM_000314.8 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 1 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
PTEN | NM_000314.8 | c.683A>G | p.Asn228Ser | missense_variant | Exon 7 of 9 | ENST00000371953.8 | NP_000305.3 | |
PTEN | NM_001304717.5 | c.1202A>G | p.Asn401Ser | missense_variant | Exon 8 of 10 | NP_001291646.4 | ||
PTEN | NM_001304718.2 | c.92A>G | p.Asn31Ser | missense_variant | Exon 7 of 9 | NP_001291647.1 |
Ensembl
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 exomes AF: 0.00000398 AC: 1AN: 251464Hom.: 0 AF XY: 0.00000736 AC XY: 1AN XY: 135902
GnomAD4 exome AF: 0.00000137 AC: 2AN: 1461802Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1AN XY: 727202
GnomAD4 genome Cov.: 32
ClinVar
Submissions by phenotype
Hereditary cancer-predisposing syndrome Uncertain:2Benign:1
The p.N228S variant (also known as c.683A>G), located in coding exon 7 of the PTEN gene, results from an A to G substitution at nucleotide position 683. The asparagine at codon 228 is replaced by serine, an amino acid with highly similar properties. In a massively parallel functional assay using a humanized yeast model, lipid phosphatase activity for this variant was functionally wild-type-like (Mighell TL et al. Am J Hum Genet, 2018 May;102:943-955). This variant demonstrated wild-type-like intracellular protein abundance on one multiplex functional assay (Matreyek KA et al. Nat Genet, 2018 Jun;50:874-882). This amino acid position is not well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -
Each variant was annotated with functional scores from MAVE data which was translated into functional evidence codes. All other evidence codes and combining criteria were adhered to as closely as possible based on the ClinGen VCEP (Variant Curation Expert Panel) gene-specific recommendations. See Supplemental Figure 34 of final paper (Supp Fig. 28 in preprint: doi:10.1101/2024.04.11.24305690) for a table to see which lines of evidence we did not have data for. The ClinGen VCEPs are highly regarded as the gold-standard for gene-specific variant curation and are developed after extensive evaluation of the evidence by clinical and scientific experts for the particular gene to classify genomic variants on a spectrum from pathogenic to benign using the 2015 ACMG/AMP Variant Interpretation Guidelines as a backbone (PMID: 25741868). Reclassification of these VUS variants from gnomAD or All of Us focused only on variants originally prescribed as VUS in ClinVar. To ensure reproducibility, transparency, and increased throughput, all the procedures for annotating variants and assigning evidence codes were codified using Python. All code has been made freely available and is linked in the Code Availability section and all reclassified variants with evidence codes used can be found in Tables S18-19 (preprint: doi:10.1101/2024.04.11.24305690). For the MAVE data, the clinical curation and clinical strength assignment as per the ClinGen recommendations in Brnich et al. (2020) (PMID: 31892348) for or against pathogenicity or benignity of each of these MAVE datasets utilized in this study were previously published in Fayer et al. (2021) (PMID: 34793697).For PTEN, two assays measuring activity and abundance were used. If the abundance was categorized as "wt-like" or "possibly wt-like," BS3_Supporting evidence was used. Furthermore, if the cumulative score was greater than -5, BS3_moderate evidence was used. This variant GRCh37:10:89717658:A>G was assigned evidence codes ['BS3_Supporting', 'BP4', 'BS1_Supporting'] and an overall classification of Likely Benign -
This missense variant replaces asparagine with serine at codon 228 of the PTEN protein. Functional studies performed in a variety of assays were inconclusive due to conflicting results, although the variant largely behaved like wild-type in most assays (PMID: 32350270). This variant has not been reported in individuals affected with hereditary cancer in the literature. This variant has been identified in 1/251464 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -
PTEN hamartoma tumor syndrome Uncertain:1
This sequence change replaces asparagine, which is neutral and polar, with serine, which is neutral and polar, at codon 228 of the PTEN protein (p.Asn228Ser). This variant is present in population databases (rs748240670, gnomAD 0.0009%). This variant has not been reported in the literature in individuals affected with PTEN-related conditions. ClinVar contains an entry for this variant (Variation ID: 404154). 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 not expected to disrupt PTEN protein function with a negative predictive value of 80%. Experimental studies are conflicting or provide insufficient evidence to determine the effect of this variant on PTEN function (PMID: 32350270). 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. -
not provided Uncertain:1
This variant is denoted PTEN c.683A>G at the cDNA level, p.Asn228Ser (N228S) at the protein level, and results in the change of an Asparagine to a Serine (AAT>AGT). This variant has not, to our knowledge, been published in the literature as pathogenic or benign. PTEN Asn228Ser was not observed in approximately 6,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, suggesting it is not a common benign variant in these populations. Since Asparagine and Serine share similar properties, this is considered a conservative amino acid substitution. PTEN Asn228Ser occurs at a position that is not conserved and is located in the C2 domain (Wang 2008). In silico analyses are inconsistent regarding the effect this variant may have on protein structure and function. Based on currently available evidence, it is unclear whether PTEN Asn228Ser is a pathogenic or benign variant. We consider it to be a variant of uncertain significance. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at