rs113594027
Variant summary
Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2
The NM_006231.4(POLE):c.3718G>A(p.Glu1240Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00142 in 1,614,080 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E1240G) 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: Benign. The variant received -13 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes AF: 0.000729 AC: 111AN: 152196Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.000760 AC: 191AN: 251418 AF XY: 0.000824 show subpopulations
GnomAD4 exome AF: 0.00149 AC: 2182AN: 1461884Hom.: 2 Cov.: 32 AF XY: 0.00147 AC XY: 1067AN XY: 727244 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.000729 AC: 111AN: 152196Hom.: 0 Cov.: 32 AF XY: 0.000673 AC XY: 50AN XY: 74348 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
not specified Uncertain:3Benign:2
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Variant summary: POLE c.3718G>A (p.Glu1240Lys) results in a conservative amino acid change in the encoded protein sequence. Algorithms developed to predict the effect of missense changes on protein structure and function all suggest that this variant is likely to be tolerated. The variant allele was found at a frequency of 0.00076 in 251418 control chromosomes, predominantly at a frequency of 0.0015 within the Non-Finnish European subpopulation in the gnomAD database. The observed variant frequency within Non-Finnish European control individuals in the gnomAD database is approximately 1.34 fold of the estimated maximal expected allele frequency for a pathogenic variant in POLE causing Facial Dysmorphism, Immunodeficiency, Livedo, And Short Stature phenotype (0.0011). To our knowledge, no occurrence of c.3718G>A in individuals affected with Facial Dysmorphism, Immunodeficiency, Livedo, And Short Stature and no experimental evidence demonstrating its impact on protein function have been reported. ClinVar contains an entry for this variant (Variation ID: 240475). Based on the evidence outlined above, the variant was classified as likely benign. -
Variant identified in a genome or exome case(s) and assessed due to predicted null impact of the variant or pathogenic assertions in the literature or databases. Disclaimer: This variant has not undergone full assessment. The following are preliminary notes: This variant has not been reported in affected individuals. It is classified in ClinVar with 1 star as Likely benign by Invitae and VUS by GeneDx. It is present in ExAC at a MaxMAF of 0.15% (high for disease incidence and gene contribution). It is predicted to be benign by multiple prediction tools. Mouse and Rat have a Lysine at this position. -
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not provided Uncertain:3Benign:1
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The POLE c.3718G>A; p.Glu1240Lys variant (rs113594027) is reported in the literature in at least one individual with advanced cancer (Mandelker 2017), and reported as a somatic mutation in an individual with glioblastoma (Jue 2019). This variant is also reported in the ClinVar database (Variation ID: 240475). It is found in the general population with an overall allele frequency of 0.07% (206/282824 alleles) in the Genome Aggregation Database. The glutamate at codon 1240 is weakly conserved, but computational analyses are uncertain whether this variant is neutral or deleterious (REVEL: 0.17). Additionally, this variant is not located in the exonuclease domain (Parkash 2019), and gene-disease association has not been established for variants outside of the exonuclease domain (Seifert 2019). However, due to limited information, the clinical significance of this variant is uncertain at this time. Jue TR et al. A case study of a long-term glioblastoma survivor with unmethylated MGMT and hypermutated genotype. Cold Spring Harb Mol Case Stud. 2019 Jun 3;5(3). Mandelker D et al. Mutation Detection in Patients With Advanced Cancer by Universal Sequencing of Cancer-Related Genes in Tumor and Normal DNA vs Guideline-Based Germline Testing. JAMA. 2017 Sep 5;318(9):825-835. Parkash V et al. Structural consequence of the most frequently recurring cancer-associated substitution in DNA polymerase e. Nat Commun. 2019 Jan 22;10(1):373. Seifert BA et al. Determining the clinical validity of hereditary colorectal cancer and polyposis susceptibility genes using the Clinical Genome Resource Clinical Validity Framework. Genet Med. 2019 Jul;21(7):1507-1516. -
This variant is denoted POLE c.3718G>A at the cDNA level, p.Glu1240Lys (E1240K) at the protein level, and results in the change of a Glutamic Acid to a Lysine (GAG>AAG). This variant has been observed in at least one individual with advanced cancer (Mandelker 2017). POLE Glu1240Lys was observed at an allele frequency of 0.15% (190/126,656 ) in individuals of European (Non-Finnish) ancestry in large population cohorts (Lek 2016). This variant is not located in a known functional domain. In-silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function. Based on currently available evidence, it is unclear whether POLE Glu1240Lys is a pathogenic or benign variant. We consider it to be a variant of uncertain significance. -
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Hereditary cancer-predisposing syndrome Uncertain:1Benign:2
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This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -
Polymerase proofreading-related adenomatous polyposis Benign:1
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POLE-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