19-50403122-C-T

Position:

chr19-50403122-C-T

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_002691.4(POLD1):c.1040C>T(p.Pro347Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000697 in 1,563,104 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. 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. P347S) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000071 ( 0 hom. )

Consequence

POLD1
NM_002691.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:7O:1

Conservation

PhyloP100: 0.0590

Variant links:

Genes affected

POLD1 (HGNC:9175): (DNA polymerase delta 1, catalytic subunit) This gene encodes the 125-kDa catalytic subunit of DNA polymerase delta. DNA polymerase delta possesses both polymerase and 3' to 5' exonuclease activity and plays a critical role in DNA replication and repair. Alternatively spliced transcript variants have been observed for this gene, and a pseudogene of this gene is located on the long arm of chromosome 6. [provided by RefSeq, Mar 2012]

POLD1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.06797069).

BS2

High AC in GnomAd4 at 9 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
POLD1	NM_002691.4 linkuse as main transcript	c.1040C>T	p.Pro347Leu	missense_variant	9/27	ENST00000440232.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
POLD1	ENST00000440232.7 linkuse as main transcript	c.1040C>T	p.Pro347Leu	missense_variant	9/27	1	NM_002691.4	P1

Frequencies

GnomAD3 genomes

AF:

0.0000591

AC:

AN:

152196

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.0000941

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000412

AC:

AN:

169808

Hom.:

AF XY:

0.0000443

AC XY:

AN XY:

90390

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000846

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000732

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000709

AC:

100

AN:

1410790

Hom.:

Cov.:

AF XY:

0.0000818

AC XY:

AN XY:

697206

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000268

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000272

Gnomad4 SAS exome

AF:

0.000112

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000792

Gnomad4 OTH exome

AF:

0.0000514

GnomAD4 genome

AF:

0.0000591

AC:

AN:

152314

Hom.:

Cov.:

AF XY:

0.0000671

AC XY:

AN XY:

74484

show subpopulations

Gnomad4 AFR

AF:

0.0000962

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.0000941

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000273

Hom.:

Bravo

AF:

0.0000491

ExAC

AF:

0.0000171

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:7Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jan 01, 2020	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Quest Diagnostics Nichols Institute San Juan Capistrano	Aug 29, 2023	In the published literature, this variant has been reported in individuals affected with an advanced adenoma (PMID: 33436027 (2021)), colorectal cancer (PMID: 25559809 (2015)), and in a woman affected with both colorectal cancer and endometrial cancer (PMID: 32424176 (2020)). The frequency of this variant in the general population, 0.000073 (5/68286 chromosomes (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is uninformative in the assessment of its pathogenicity. Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded predictions that this variant is benign. Based on the available information, we are unable to determine the clinical significance of this variant. -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Jul 14, 2022	Observed in individuals with colorectal cancer and/or endometrial cancer (Chubb et al., 2015; Hamzaoui et al., 2020); In silico analysis supports that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 25559809, 15766587, 29056344, 29120461, 32424176, 20951805) -

Hereditary cancer-predisposing syndrome

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	Feb 24, 2023	The p.P347L variant (also known as c.1040C>T), located in coding exon 8 of the POLD1 gene, results from a C to T substitution at nucleotide position 1040. The proline at codon 347 is replaced by leucine, an amino acid with similar properties. This variant has been identified in CRC and adenoma cohorts (Chubb D et al. J Clin Oncol, 2015 Feb;33:426-32; Patel SG et al. Hered Cancer Clin Pract, 2021 Jan;19:8). This amino acid position is poorly conserved in available vertebrate species. 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. -
Uncertain significance, criteria provided, single submitter	curation	Sema4, Sema4	Sep 09, 2021	- -

POLD1-related disorder

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Sep 10, 2024

The POLD1 c.1040C>T variant is predicted to result in the amino acid substitution p.Pro347Leu. This variant has been reported in at least one individual with rectal cancer (Chubb et al. 2015. PubMed ID: 25559809. This variant is reported in 0.0085% of alleles in individuals of South Asian descent in gnomAD. The ClinVar database lists this variant as uncertain (https://www.ncbi.nlm.nih.gov/clinvar/variation/408024/). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Colorectal cancer, susceptibility to, 10

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 19, 2024

This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 347 of the POLD1 protein (p.Pro347Leu). This variant is present in population databases (rs2230243, gnomAD 0.008%). This missense change has been observed in individual(s) with rectal cancer (PMID: 25559809). ClinVar contains an entry for this variant (Variation ID: 408024). 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 POLD1 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. -

Colorectal cancer, susceptibility to, 10;C3715192:Mandibular hypoplasia-deafness-progeroid syndrome

Other:1

not provided, no classification provided

phenotyping only

GenomeConnect - Invitae Patient Insights Network

Variant interpreted as Uncertain significance and reported on 02-15-2021 by Lab Invitae. GenomeConnect-Invitae Patient Insights Network assertions are reported exactly as they appear on the patient-provided report from the testing laboratory. Registry team members make no attempt to reinterpret the clinical significance of the variant. Phenotypic details are available under supporting information. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.42

BayesDel_noAF

Benign

-0.64

CADD

Benign

DANN

Benign

0.88

DEOGEN2

Benign

0.21

T;.;.;T

Eigen

Benign

-1.3

Eigen_PC

Benign

-1.3

FATHMM_MKL

Benign

0.25

LIST_S2

Pathogenic

0.97

.;.;D;D

M_CAP

Benign

0.014

MetaRNN

Benign

0.068

T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.0

L;.;.;L

MutationTaster

Benign

1.0

PrimateAI

Benign

0.44

PROVEAN

Benign

-1.8

N;.;.;.

REVEL

Benign

0.035

Sift

Benign

0.080

T;.;.;.

Sift4G

Benign

0.18

T;T;T;T

Polyphen

0.032

B;.;.;B

Vest4

0.29

MutPred

0.24

Loss of relative solvent accessibility (P = 0.0186);Loss of relative solvent accessibility (P = 0.0186);Loss of relative solvent accessibility (P = 0.0186);Loss of relative solvent accessibility (P = 0.0186);

MVP

0.23

MPC

0.22

ClinPred

0.044

GERP RS

-2.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.2

Varity_R

0.12

gMVP

0.50

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

Other links and lift over