rs780556141
Variant summary
Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PP3_Moderate
The NM_006231.4(POLE):c.1550C>T(p.Pro517Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000161 in 1,614,054 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).
Frequency
Consequence
NM_006231.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 2 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes AF: 0.0000263 AC: 4AN: 152202Hom.: 0 Cov.: 33
GnomAD3 exomes AF: 0.00000797 AC: 2AN: 250822Hom.: 0 AF XY: 0.00000737 AC XY: 1AN XY: 135696
GnomAD4 exome AF: 0.0000150 AC: 22AN: 1461852Hom.: 0 Cov.: 33 AF XY: 0.0000151 AC XY: 11AN XY: 727224
GnomAD4 genome AF: 0.0000263 AC: 4AN: 152202Hom.: 0 Cov.: 33 AF XY: 0.0000134 AC XY: 1AN XY: 74352
ClinVar
Submissions by phenotype
not provided Uncertain:2
This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 517 of the POLE protein (p.Pro517Leu). This variant is present in population databases (rs780556141, gnomAD 0.002%). This variant has not been reported in the literature in individuals affected with POLE-related conditions. ClinVar contains an entry for this variant (Variation ID: 517195). 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 expected to disrupt POLE protein function with a positive 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. -
Not observed at a significant frequency in large population cohorts (Lek et al., 2016); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Observed in an individual with ovarian cancer (Song 2020); This variant is associated with the following publications: (PMID: 32546565) -
not specified Uncertain:1
The p.Pro517Leu variant in POLE has not been previously reported in individuals with colorectal cancer, but has been identified in 1/66194 of European chromosom es by the Exome Aggregation Consortium (ExAC, http://exac.broadinstitute.org; db SNP rs780556141). Computational prediction tools and conservation analysis sugge st that the p.Pro517Leu variant may impact the protein, though this information is not predictive enough to determine pathogenicity. In summary, the clinical si gnificance of the p.Pro517Leu variant is uncertain. -
Hereditary cancer-predisposing syndrome Uncertain:1
The p.P517L variant (also known as c.1550C>T), located in coding exon 15 of the POLE gene, results from a C to T substitution at nucleotide position 1550. The proline at codon 517 is replaced by leucine, an amino acid with similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Based on the available evidence, the clinical significance of this variant remains unclear. -
Colorectal cancer, susceptibility to, 12;C3554576:Facial dysmorphism-immunodeficiency-livedo-short stature syndrome Other:1
Variant interpreted as Uncertain significance and reported on 07-10-2018 by Lab Invitae. GenomeConnect-Invitae Patient Insights Network assertions are reported exactly as they appear on the patient-provided report from the testing laboratory. Registry team members make no attempt to reinterpret the clinical significance of the variant. Phenotypic details are available under supporting information. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at