Genetic Variant NM_006231.4:c.2468+10C>T (chr12-132665292-G-A) – ACMG Classification: Benign (-16 pts)

Variant summary

Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP6_Very_StrongBS1BS2

The NM_006231.4(POLE):c.2468+10C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000558 in 1,610,342 control chromosomes in the GnomAD database, including 6 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0031 ( 4 hom., cov: 31)

Exomes 𝑓: 0.00029 ( 2 hom. )

Consequence

POLE
NM_006231.4 intron

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:12

Conservation

PhyloP100: 0.262

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -16 ACMG points.

BP6

Variant 12-132665292-G-A is Benign according to our data. Variant chr12-132665292-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 221103.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr12-132665292-G-A is described in Lovd as [Benign].

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00314 (478/152088) while in subpopulation AFR AF= 0.0112 (463/41462). AF 95% confidence interval is 0.0103. There are 4 homozygotes in gnomad4. There are 234 alleles in male gnomad4 subpopulation. Median coverage is 31. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 4 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
POLE	NM_006231.4 link	c.2468+10C>T		intron_variant	Intron 21 of 48	ENST00000320574.10	NP_006222.2	Q07864

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
POLE	ENST00000320574.10 link	c.2468+10C>T		intron_variant	Intron 21 of 48	1	NM_006231.4	ENSP00000322570.5		Q07864

Frequencies

GnomAD3 genomes

AF:

0.00311

AC:

472

AN:

151970

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0111

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000918

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:

0.00

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.000755

AC:

189

AN:

250492

Hom.:

AF XY:

0.000510

AC XY:

AN XY:

135410

show subpopulations

Gnomad AFR exome

AF:

0.0105

Gnomad AMR exome

AF:

0.000522

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.000288

AC:

420

AN:

1458254

Hom.:

Cov.:

AF XY:

0.000229

AC XY:

166

AN XY:

724896

show subpopulations

Gnomad4 AFR exome

AF:

0.0107

Gnomad4 AMR exome

AF:

0.000628

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.000548

GnomAD4 genome

AF:

0.00314

AC:

478

AN:

152088

Hom.:

Cov.:

AF XY:

0.00315

AC XY:

234

AN XY:

74332

show subpopulations

Gnomad4 AFR

AF:

0.0112

Gnomad4 AMR

AF:

0.000916

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000474

Alfa

AF:

0.00312

Hom.:

Bravo

AF:

0.00359

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:12

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:4

Jul 10, 2018

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: POLE c.2468+10C>T alters a non-conserved nucleotide located close to a canonical splice site and therefore could affect mRNA splicing, leading to a significantly altered protein sequence. 5/5 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant was observed with an allele frequency of 0.001 in 276194 control chromosomes (gnomAD), predominantly in the African cohort with an allele frequency of 0.012. The observed variant frequency within African control individuals in the gnomAD database is approximately 774-folds higher than the estimated maximal expected allele frequency for a pathogenic variant in POLE causing Colorectal Cancer phenotype (1.4e-05), strongly suggesting that the variant is a benign polymorphism found primarily in populations of African origin. To our knowledge, no occurrence of c.2468+10C>T in individuals affected with Colorectal Cancer and no experimental evidence demonstrating its impact on protein function have been reported. Four ClinVar submissions from clinical diagnostic laboratories (evaluation after 2014) cite the variant as "likely benign/benign." Based on the evidence outlined above, the variant was classified as benign. -

Apr 27, 2017

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jun 29, 2017

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Nov 08, 2017

Genetic Services Laboratory, University of Chicago

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Colorectal cancer, susceptibility to, 12

Benign:2

Jul 07, 2023

KCCC/NGS Laboratory, Kuwait Cancer Control Center

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Oct 04, 2016

Counsyl

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Benign:2

Feb 04, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Nov 28, 2022

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Carcinoma of colon

Benign:1

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

The POLE c.2468+10C>T variant was not identified in the literature. The variant was identified in dbSNP (ID: rs5744823) as "With other allele ", and in ClinVar database (classified as benign by Invitae and one clinical laboratory; as likely benign by Counsyl, GeneDx, and Prevention Genetics). The variant was identified in control databases in 284 of 276194 chromosomes at a frequency of 0.001 increasing the likelihood this could be a low frequency benign variant (Genome Aggregation Database Feb 27, 2017). The variant was observed in the following populations: African in 263 of 24008 chromosomes (freq: 0.01), Other in 2 of 6436 chromosomes (freq: 0.0003), Latino in 19 of 34346 chromosomes (freq: 0.0006), while the variant was not observed in the European, Ashkenazi Jewish, East Asian, Finnish, and South Asian populations. The variant occurs outside of the splicing consensus sequence and in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer) do not predict a difference in splicing. In summary, based on the above information the clinical significance of this variant cannot be determined with certainty at this time although we would lean towards a more benign role for this variant. This variant is classified as likely benign. -

POLE-related disorder

Benign:1

Sep 04, 2019

PreventionGenetics, part of Exact Sciences

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Hereditary cancer-predisposing syndrome

Benign:1

Oct 16, 2015

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely 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. -

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

Benign:1

May 18, 2022

Fulgent Genetics, Fulgent Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.83

CADD

Benign

DANN

Benign

0.52

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.50

Details are displayed if max score is > 0.2

DS_DG_spliceai

0.50

Position offset: 6

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

Other links and lift over