12-132643250-T-C

Position:

• chr12-132643250-T-C

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 0P and 1B. BP4

The NM_006231.4(POLE):​c.4525A>G​(p.Arg1509Gly) variant causes a missense change. The variant allele was found at a frequency of 0.0000452 in 1,461,466 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 0.000045 (0 hom.)
• Consequence: POLE NM_006231.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 6.18

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 (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.27177054).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
POLE	NM_006231.4	c.4525A>G	p.Arg1509Gly	missense_variant	35/49	ENST00000320574.10	NP_006222.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
POLE	ENST00000320574.10	c.4525A>G	p.Arg1509Gly	missense_variant	35/49	1	NM_006231.4	ENSP00000322570.5

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome AF: 0.0000452 AC: 66 AN: 1461466 Hom.: 0 Cov.: 36 AF XY: 0.0000495 AC XY: 36 AN XY: 726982

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: 0.00

Gnomad4 NFE exome AF: 0.0000585

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 34

Bravo AF: 0.00000756

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 27, 2024	This sequence change replaces arginine, which is basic and polar, with glycine, which is neutral and non-polar, at codon 1509 of the POLE protein (p.Arg1509Gly). This variant is not present in population databases (gnomAD no frequency). 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: 405708). 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 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. -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Nov 28, 2018	This variant is denoted POLE c.4525A>G at the cDNA level, p.Arg1509Gly (R1509G) at the protein level, and results in the change of an Arginine to a Glycine (AGG>GGG). This variant has not, to our knowledge, been published in the literature as a pathogenic or benign germline variant. POLE Arg1509Gly was not observed 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 a deleterious effect. Based on currently available evidence, it is unclear whether POLE Arg1509Gly is a pathogenic or benign variant. We consider it to be a variant of uncertain significance. -

Hereditary cancer-predisposing syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 10, 2021

The p.R1509G variant (also known as c.4525A>G), located in coding exon 35 of the POLE gene, results from an A to G substitution at nucleotide position 4525. The arginine at codon 1509 is replaced by glycine, an amino acid with dissimilar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated 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	Benign	0.24
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.41
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.52	D;.
Eigen	Benign	-0.097
Eigen_PC	Benign	0.0067
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.94	D;D
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.27	T;T
MetaSVM	Benign	-0.98	T
MutationAssessor	Benign	1.9	L;.
PrimateAI	Benign	0.35	T
PROVEAN	Uncertain	-4.1	D;D
REVEL	Benign	0.17
Sift	Benign	0.040	D;D
Sift4G	Benign	0.11	T;T
Polyphen		0.037	B;B
Vest4		0.38
MutPred		0.40		Gain of catalytic residue at S1511 (P = 2e-04);.;
MVP		0.34
MPC		0.25
ClinPred		0.97	D
GERP RS		4.8
Varity_R		0.50
gMVP		0.53

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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

Other links and lift over

dbSNP: rs1060500816; hg19: chr12-133219836;