Variant chr12-132676605-T-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 0P and 0B.

The NM_006231.4(POLE):c.850A>G(p.Lys284Glu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000836 in 1,613,894 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000090 ( 0 hom. )

Consequence

POLE
NM_006231.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:9

Conservation

PhyloP100: 7.98

Variant links:

Genes affected

POLE (HGNC:9177): (DNA polymerase epsilon, catalytic subunit) This gene encodes the catalytic subunit of DNA polymerase epsilon. The enzyme is involved in DNA repair and chromosomal DNA replication. Mutations in this gene have been associated with colorectal cancer 12 and facial dysmorphism, immunodeficiency, livedo, and short stature. [provided by RefSeq, Sep 2013]

POLE links:

POLE (HGNC:):

POLE links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
POLE	NM_006231.4 linkuse as main transcript	c.850A>G	p.Lys284Glu	missense_variant	9/49	ENST00000320574.10	NP_006222.2	Q07864

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
POLE	ENST00000320574.10 linkuse as main transcript	c.850A>G	p.Lys284Glu	missense_variant	9/49	1	NM_006231.4	ENSP00000322570.5		Q07864

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152128

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000358

AC:

AN:

251454

Hom.:

AF XY:

0.0000515

AC XY:

AN XY:

135904

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000185

Gnomad NFE exome

AF:

0.0000352

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000896

AC:

131

AN:

1461766

Hom.:

Cov.:

AF XY:

0.0000976

AC XY:

AN XY:

727178

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000749

Gnomad4 NFE exome

AF:

0.000111

Gnomad4 OTH exome

AF:

0.0000662

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152128

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74320

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000162

Hom.:

Bravo

AF:

0.0000491

ExAC

AF:

0.0000412

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:9

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Colorectal cancer, susceptibility to, 12

Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	Counsyl	Oct 17, 2017	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Myriad Genetics, Inc.	Apr 19, 2023	This variant is classified as a variant of uncertain significance as there is insufficient evidence to determine its impact on protein function and/or cancer risk. -
Uncertain significance, criteria provided, single submitter	clinical testing	Baylor Genetics	Oct 03, 2023	- -

not specified

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Jul 05, 2024	Variant summary: POLE c.850A>G (p.Lys284Glu) results in a conservative amino acid change located in the DNA-directed DNA polymerase, family B, exonuclease domain (IPR006133) of the encoded protein sequence. Three of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 3.6e-05 in 251454 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.850A>G has been reported in the literature in settings of whole exome sequencing (WES) performed in at-least one individual affected with Colorectal Cancer highly suspected of a hereditary cause (example, Weren_2015). These report(s) do not provide unequivocal conclusions about association of the variant with Colorectal Cancer. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication have been ascertained in the context of this evaluation (PMID: 25938944). ClinVar contains an entry for this variant (Variation ID: 405725). Based on the evidence outlined above, the variant was classified as uncertain significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital	Aug 15, 2023	- -

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Oct 29, 2024	Observed in an individual with multiple adenomatous polyps and in another individual with colon cancer who also carried a pathogenic variant in PMS2 (PMID: 25938944, 29596542); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 25938944, 28492532, 28404093, 29596542, 30448219) -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 29, 2024	This sequence change replaces lysine, which is basic and polar, with glutamic acid, which is acidic and polar, at codon 284 of the POLE protein (p.Lys284Glu). This variant is present in population databases (rs568483856, gnomAD 0.02%). This missense change has been observed in individual(s) with multiple colon polyps (PMID: 25938944). ClinVar contains an entry for this variant (Variation ID: 405725). 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 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. -

POLE-related disorder

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jul 29, 2024

The POLE c.850A>G variant is predicted to result in the amino acid substitution p.Lys284Glu. This variant was reported in an individual with colorectal cancer and adenomatous polyposis in the absence of other known pathogenic variants (Weren et al. 2015. PubMed ID: 25938944). This variant is reported in 0.016% of alleles in individuals of European (Finnish) descent in gnomAD and is classified as a variant on uncertain significance in ClinVar (https://www.ncbi.nlm.nih.gov/clinvar/variation/405725/). 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

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 26, 2023

The p.K284E variant (also known as c.850A>G), located in coding exon 9 of the POLE gene, results from an A to G substitution at nucleotide position 850. The lysine at codon 284 is replaced by glutamic acid, an amino acid with similar properties. In a study of 51 individuals with multiple colonic adenomas from 48 families who underwent whole-exome sequencing, this variant was identified in a patient with a mix of 30 adenomatous, hyperplastic, and serrated polyps who did not have first degree relatives with colorectal cancer or polyps (Weren RD et al. Nat. Genet. 2015 Jun;47:668-71). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

1.0

BayesDel_addAF

Uncertain

0.13

BayesDel_noAF

Uncertain

0.13

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.41

T;.

Eigen

Pathogenic

0.80

Eigen_PC

Pathogenic

0.77

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

1.0

D;D

M_CAP

Benign

0.021

MetaRNN

Uncertain

0.57

D;D

MetaSVM

Benign

-0.47

MutationAssessor

Pathogenic

3.2

M;.

PrimateAI

Pathogenic

0.85

PROVEAN

Uncertain

-3.5

D;D

REVEL

Pathogenic

0.66

Sift

Uncertain

0.0020

D;D

Sift4G

Uncertain

0.0030

D;D

Polyphen

1.0

D;D

Vest4

0.72

MutPred

0.48

Gain of catalytic residue at L281 (P = 0);.;

MVP

0.54

MPC

0.92

ClinPred

0.87

GERP RS

5.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.80

gMVP

0.80

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

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