19-50416610-G-T

Variant summary

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

The NM_002691.4(POLD1):c.2954G>T(p.Arg985Leu) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.00000769 in 1,560,206 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. 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. R985P) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 34)

Exomes 𝑓: 0.0000078 ( 0 hom. )

Consequence

POLD1
NM_002691.4 missense, splice_region

Scores

Splicing: ADA: 0.7466

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 5.09

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 Likely_benign. Variant got -1 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.42244467).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
POLD1	NM_002691.4 linkuse as main transcript	c.2954G>T	p.Arg985Leu	missense_variant, splice_region_variant	24/27	ENST00000440232.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
POLD1	ENST00000440232.7 linkuse as main transcript	c.2954G>T	p.Arg985Leu	missense_variant, splice_region_variant	24/27	1	NM_002691.4	P1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152174

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.00

GnomAD3 exomes

AF:

0.0000122

AC:

AN:

163266

Hom.:

AF XY:

0.0000224

AC XY:

AN XY:

89118

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000814

Gnomad SAS exome

AF:

0.0000418

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000781

AC:

AN:

1408032

Hom.:

Cov.:

AF XY:

0.00000861

AC XY:

AN XY:

696570

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000267

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000273

Gnomad4 SAS exome

AF:

0.0000498

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000459

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152174

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74332

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000654

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:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Colorectal cancer, susceptibility to, 10

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jul 30, 2023

ClinVar contains an entry for this variant (Variation ID: 850842). This variant has not been reported in the literature in individuals affected with POLD1-related conditions. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This sequence change replaces arginine, which is basic and polar, with leucine, which is neutral and non-polar, at codon 985 of the POLD1 protein (p.Arg985Leu). 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. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. -

Hereditary cancer-predisposing syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 28, 2023

The p.R985L variant (also known as c.2954G>T) is located in coding exon 23 of the POLD1 gene. The arginine at codon 985 is replaced by leucine, an amino acid with dissimilar properties. This change occurs in the first base pair of coding exon 23. 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

Uncertain

0.37

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.45

Cadd

Pathogenic

Dann

Uncertain

0.99

DEOGEN2

Uncertain

0.77

D;.;.;D

Eigen

Benign

0.013

Eigen_PC

Benign

-0.067

FATHMM_MKL

Benign

0.71

M_CAP

Uncertain

0.12

MetaRNN

Benign

0.42

T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.8

M;.;.;M

MutationTaster

Benign

0.97

PrimateAI

Pathogenic

0.88

PROVEAN

Pathogenic

-5.3

D;.;.;.

REVEL

Benign

0.15

Sift

Benign

0.076

T;.;.;.

Sift4G

Benign

0.12

T;T;T;T

Polyphen

0.068

B;.;.;B

Vest4

0.46

MutPred

0.59

Loss of solvent accessibility (P = 0.0079);.;.;Loss of solvent accessibility (P = 0.0079);

MVP

0.53

MPC

1.6

ClinPred

0.95

GERP RS

2.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.39

gMVP

0.55

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.75

dbscSNV1_RF

Benign

0.71

SpliceAI score (max)

0.020

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