19-50407401-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -19 ACMG points: 0P and 19B. BP4_ModerateBP6_Very_StrongBP7BS1BS2

The NM_002691.4(POLD1):c.1761C>T(p.Ile587Ile) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00169 in 1,607,448 control chromosomes in the GnomAD database, including 37 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★). Synonymous variant affecting the same amino acid position (i.e. I587I) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0091 ( 16 hom., cov: 30)

Exomes 𝑓: 0.00091 ( 21 hom. )

Consequence

POLD1
NM_002691.4 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:12

Conservation

PhyloP100: -1.00

Publications

5 publications found

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 Gene-Disease associations (from GenCC):

POLD1-related polyposis and colorectal cancer syndrome
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
colorectal cancer, susceptibility to, 10
Inheritance: AD Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Genomics England PanelApp
mandibular hypoplasia-deafness-progeroid syndrome
Inheritance: AD, AR Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia, Genomics England PanelApp, Ambry Genetics, Orphanet, G2P
Polymerase proofreading-related adenomatous polyposis
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
immunodeficiency 120
Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics
non-severe combined immunodeficiency due to polymerase delta deficiency
Inheritance: AR Classification: LIMITED Submitted by: ClinGen

POLD1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -19 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.24).

BP6

Variant 19-50407401-C-T is Benign according to our data. Variant chr19-50407401-C-T is described in ClinVar as Benign. ClinVar VariationId is 220950.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-1 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00912 (1388/152164) while in subpopulation AFR AF = 0.031 (1286/41498). AF 95% confidence interval is 0.0296. There are 16 homozygotes in GnomAd4. There are 658 alleles in the male GnomAd4 subpopulation. Median coverage is 30. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 16 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
POLD1	NM_002691.4 link	c.1761C>T	p.Ile587Ile	synonymous_variant	Exon 14 of 27	ENST00000440232.7	NP_002682.2	P28340A0A024R4F4Q59FA0

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
POLD1	ENST00000440232.7 link	c.1761C>T	p.Ile587Ile	synonymous_variant	Exon 14 of 27	1	NM_002691.4	ENSP00000406046.1		P28340

Frequencies

GnomAD3 genomes

AF:

0.00910

AC:

1384

AN:

152046

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0310

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00524

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.00623

GnomAD2 exomes

AF:

0.00255

AC:

618

AN:

242410

AF XY:

0.00177

show subpopulations

Gnomad AFR exome

AF:

0.0332

Gnomad AMR exome

AF:

0.00277

Gnomad ASJ exome

AF:

0.000101

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000732

Gnomad OTH exome

AF:

0.00118

GnomAD4 exome

AF:

0.000910

AC:

1325

AN:

1455284

Hom.:

Cov.:

AF XY:

0.000765

AC XY:

553

AN XY:

723022

show subpopulations

African (AFR)

AF:

0.0311

AC:

1035

AN:

33332

American (AMR)

AF:

0.00282

AC:

125

AN:

44350

Ashkenazi Jewish (ASJ)

AF:

0.0000767

AC:

AN:

26066

East Asian (EAS)

AF:

0.00

AC:

AN:

39428

South Asian (SAS)

AF:

0.0000819

AC:

AN:

85522

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52738

Middle Eastern (MID)

AF:

0.000869

AC:

AN:

5756

European-Non Finnish (NFE)

AF:

0.0000262

AC:

AN:

1108016

Other (OTH)

AF:

0.00203

AC:

122

AN:

60076

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.501

Heterozygous variant carriers

131

196

262

327

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

128

160

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00912

AC:

1388

AN:

152164

Hom.:

Cov.:

AF XY:

0.00885

AC XY:

658

AN XY:

74386

show subpopulations

African (AFR)

AF:

0.0310

AC:

1286

AN:

41498

American (AMR)

AF:

0.00524

AC:

AN:

15280

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.000208

AC:

AN:

4816

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10604

Middle Eastern (MID)

AF:

0.00680

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000882

AC:

AN:

67992

Other (OTH)

AF:

0.00616

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.505

Heterozygous variant carriers

138

207

276

345

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00358

Hom.:

Bravo

AF:

0.0105

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Benign:12

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:5

Mar 04, 2025

Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 06, 2017

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Aug 04, 2016

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Oct 12, 2017

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

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: The POLD1 c.1761C>T (p.Ile587Ile) variant involves the alteration of a non-conserved nucleotide causing a synonymous change and 5/5 splice prediction tools predict no significant impact on normal splicing. ESE finder predicts that this variant does not alter ESE binding. However, these predictions have yet to be confirmed by functional studies. This variant was found in 868/268896 control chromosomes (gnomAD), predominantly observed in the African subpopulation at a frequency of 0.032564 (753/23124, 13 homozygotes). This frequency is about 2292 times the estimated maximal expected allele frequency of a pathogenic POLD1 variant (0.0000142), suggesting this is likely a benign polymorphism found primarily in the populations of African origin. Multiple clinical diagnostic laboratories classified this variant as benign. The variant of interest has not, to our knowledge, been reported in affected individuals via publications. Taken together, this variant is classified as benign. -

May 25, 2017

GeneDx

Significance: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. -

not provided

Benign:2

Jan 06, 2023

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Colorectal cancer, susceptibility to, 10

Benign:2

Feb 04, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jul 07, 2023

KCCC/NGS Laboratory, Kuwait Cancer Control Center

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Hereditary cancer-predisposing syndrome

Benign:2

Oct 25, 2017

True Health Diagnostics

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

May 20, 2015

Ambry Genetics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as 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. -

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 POLD1 p.Ile587= variant was not identified in the literature nor was it identified in Cosmic or MutDB. The variant was identified in dbSNP (ID: rs3218755 as With Likely benign allele) and ClinVar (classified as benign by Invitae, GeneDx, Ambry Genetics and Quest Diagnostics). The variant was also identified in control databases in 868 of 268896 chromosomes (13 homozygous) at a frequency of 0.003, increasing the likelihood this could be a low frequency benign variant (Genome Aggregation Database Feb 27, 2017). This variant was observed in the following populations: African in 753 of 23124 chromosomes (freq: 0.03), Other in 10 of 6290 chromosomes (freq: 0.002), Latino in 96 of 33914 chromosomes (freq: 0.003), European Non-Finnish in 8 of 122672 chromosomes (freq: 0.00007), and Ashkenazi Jewish in 1 of 9970 chromosomes (freq: 0.0001), while the variant was not observed in the East Asian, Finnish, or South Asian populations. The p.Ile587= variant is not expected to have clinical significance because it does not result in a change of amino acid and c.1761 is not a well conserved nucleotide. In addition, the variant is not located in a known consensus splice site and in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer) do not predict a difference in splicing. In summary, the clinical significance of this variant cannot be determined with certainty at this time, although the available information suggests a benign role for this variant. This variant is classified as likely benign. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.24

CADD

Benign

4.1

(source)

DANN

Benign

0.82

PhyloP100

-1.0

Mutation Taster

=98/2

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over