12-132638119-C-T
Variant summary
Our verdict is Uncertain significance. The variant received 0 ACMG points: 0P and 0B.
The NM_006231.4(POLE):c.5573G>A(p.Arg1858His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000821 in 1,461,772 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. R1858C) has been classified as Uncertain significance.
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: Uncertain_significance. The variant received 0 ACMG points.
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|
| POLE | NM_006231.4 | c.5573G>A | p.Arg1858His | missense_variant | Exon 41 of 49 | ENST00000320574.10 | NP_006222.2 | |
| POLE | XM_011534795.4 | c.5573G>A | p.Arg1858His | missense_variant | Exon 41 of 48 | XP_011533097.1 | ||
| POLE | XM_011534797.4 | c.4652G>A | p.Arg1551His | missense_variant | Exon 33 of 40 | XP_011533099.1 | ||
| POLE | XM_011534802.4 | c.2561G>A | p.Arg854His | missense_variant | Exon 17 of 24 | XP_011533104.1 |
Ensembl
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD2 exomes AF: 0.0000119 AC: 3AN: 251380 AF XY: 0.0000147 show subpopulations
GnomAD4 exome AF: 0.00000821 AC: 12AN: 1461772Hom.: 0 Cov.: 31 AF XY: 0.00000825 AC XY: 6AN XY: 727198 show subpopulations
Age Distribution
GnomAD4 genome Cov.: 32
ClinVar
Submissions by phenotype
not provided Uncertain:2
This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 1858 of the POLE protein (p.Arg1858His). This variant is present in population databases (no rsID available, gnomAD 0.006%). 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: 540672). 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 POLE 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. -
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; Observed in an individual with breast cancer (PMID: 35264596); This variant is associated with the following publications: (PMID: 33569431, 35264596) -
Familial colorectal cancer Uncertain:1
- -
POLE-related disorder Uncertain:1
The POLE c.5573G>A variant is predicted to result in the amino acid substitution p.Arg1858His. This variant has been reported with uncertain significance in a study of Brazilian breast cancer patients (Supplementary Table 3, Guindalini et al. 2022. PubMed ID: 35264596). This variant is reported in 0.0065% of alleles in individuals of South Asian descent in gnomAD and is interpreted as uncertain in ClinVar (https://www.ncbi.nlm.nih.gov/clinvar/variation/540672/). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -
Hereditary cancer-predisposing syndrome Uncertain:1
The p.R1858H variant (also known as c.5573G>A), located in coding exon 41 of the POLE gene, results from a G to A substitution at nucleotide position 5573. The arginine at codon 1858 is replaced by histidine, an amino acid with highly similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. 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