rs369751686
Variant summary
Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BP4
The NM_006231.4(POLE):c.2770C>T(p.Arg924Cys) variant causes a missense change. The variant allele was found at a frequency of 0.0000291 in 1,614,016 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 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. R924H) has been classified as Likely benign.
Frequency
Consequence
NM_006231.4 missense
Scores
Clinical Significance
Conservation
Publications
- POLE-related polyposis and colorectal cancer syndromeInheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
- colorectal cancer, susceptibility to, 12Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Ambry Genetics
- facial dysmorphism-immunodeficiency-livedo-short stature syndromeInheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics
- intrauterine growth retardation, metaphyseal dysplasia, adrenal hypoplasia congenita, genital anomalies, and immunodeficiencyInheritance: AR Classification: STRONG Submitted by: G2P
- IMAGe syndromeInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
- Polymerase proofreading-related adenomatous polyposisInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
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ACMG classification
Our verdict: Likely_benign. The variant received -1 ACMG points.
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|
| POLE | NM_006231.4 | c.2770C>T | p.Arg924Cys | missense_variant | Exon 24 of 49 | ENST00000320574.10 | NP_006222.2 |
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
|---|---|---|---|---|---|---|---|---|---|---|
| POLE | ENST00000320574.10 | c.2770C>T | p.Arg924Cys | missense_variant | Exon 24 of 49 | 1 | NM_006231.4 | ENSP00000322570.5 |
Frequencies
GnomAD3 genomes AF: 0.0000329 AC: 5AN: 152152Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.0000119 AC: 3AN: 251484 AF XY: 0.00 show subpopulations
GnomAD4 exome AF: 0.0000287 AC: 42AN: 1461864Hom.: 0 Cov.: 32 AF XY: 0.0000261 AC XY: 19AN XY: 727232 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.0000329 AC: 5AN: 152152Hom.: 0 Cov.: 32 AF XY: 0.0000538 AC XY: 4AN XY: 74342 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
not provided Uncertain:3
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This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 924 of the POLE protein (p.Arg924Cys). This variant is present in population databases (rs369751686, gnomAD 0.004%). 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: 405595). 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 significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Reported in an individual with small bowel cancer whose tumor was microsatellite unstable and demonstrated loss of MSH2 and MSH6 expression, but also harbored two somatic MSH2 missense variants (PMID: 29987844); This variant is associated with the following publications: (PMID: 25801821, 36497424, 29987844, 20951805, 34326862) -
Colorectal cancer, susceptibility to, 12;C3554576:Facial dysmorphism-immunodeficiency-livedo-short stature syndrome;C5193036:Intrauterine growth retardation, metaphyseal dysplasia, adrenal hypoplasia congenita, genital anomalies, and immunodeficiency Uncertain:2
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not specified Uncertain:1
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Hereditary cancer-predisposing syndrome Uncertain:1
The p.R924C variant (also known as c.2770C>T), located in coding exon 24 of the POLE gene, results from a C to T substitution at nucleotide position 2770. The arginine at codon 924 is replaced by cysteine, an amino acid with highly dissimilar properties. This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Based on the available evidence, the clinical significance of this variant remains unclear. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at