chr19-50415421-G-A

Position:

• chr19-50415421-G-A

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PP3_Moderate BP6 BS2

The NM_002691.4(POLD1):​c.2565-17G>A variant causes a splice polypyrimidine tract, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000514 in 1,604,110 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.00073 (2 hom., cov: 33)
  • Exomes 𝑓: 0.00049 (2 hom.)
• Consequence: POLD1 NM_002691.4 splice_polypyrimidine_tract, intron
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:5
• Conservation: PhyloP100: 0.0400

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]

ACMG classification

Verdict is Likely_benign. Variant got -3 ACMG points.

• PP3: Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
• BP6: Variant 19-50415421-G-A is Benign according to our data. Variant chr19-50415421-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 371997.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=4, Benign=1, Uncertain_significance=2}.
• BS2: High AC in GnomAd4 at 111 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
POLD1	NM_002691.4	c.2565-17G>A		splice_polypyrimidine_tract_variant, intron_variant		ENST00000440232.7	NP_002682.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
POLD1	ENST00000440232.7	c.2565-17G>A		splice_polypyrimidine_tract_variant, intron_variant		1	NM_002691.4	ENSP00000406046	P1

Frequencies

GnomAD3 genomes AF: 0.000729 AC: 111 AN: 152172 Hom.: 2 Cov.: 33

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00669

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000514

Gnomad OTH AF: 0.00143

GnomAD3 exomes AF: 0.000777 AC: 191 AN: 245866 Hom.: 0 AF XY: 0.000784 AC XY: 105 AN XY: 133966

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000550

Gnomad SAS exome AF: 0.0000658

Gnomad FIN exome AF: 0.00535

Gnomad NFE exome AF: 0.000636

Gnomad OTH exome AF: 0.000664

GnomAD4 exome AF: 0.000491 AC: 713 AN: 1451820 Hom.: 2 Cov.: 32 AF XY: 0.000505 AC XY: 364 AN XY: 720466

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000254

Gnomad4 SAS exome AF: 0.0000349

Gnomad4 FIN exome AF: 0.00614

Gnomad4 NFE exome AF: 0.000324

Gnomad4 OTH exome AF: 0.000468

GnomAD4 genome AF: 0.000729 AC: 111 AN: 152290 Hom.: 2 Cov.: 33 AF XY: 0.000846 AC XY: 63 AN XY: 74472

Gnomad4 AFR AF: 0.0000241

Gnomad4 AMR AF: 0.0000654

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00669

Gnomad4 NFE AF: 0.000515

Gnomad4 OTH AF: 0.00142

Alfa AF: 0.000969 Hom.: 1

Bravo AF: 0.000178

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:5

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Colorectal cancer, susceptibility to, 10 Benign:3

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 29, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	Counsyl	Oct 04, 2016	- -
Likely benign, criteria provided, single submitter	clinical testing	KCCC/NGS Laboratory, Kuwait Cancer Control Center	Jul 07, 2023	- -

not specified Uncertain:1 Benign:1

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Jul 17, 2017	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. -
Uncertain significance, criteria provided, single submitter	clinical testing	Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital	Jul 31, 2024	- -

not provided Uncertain:1 Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Institute for Clinical Genetics, University Hospital TU Dresden, University Hospital TU Dresden	Nov 03, 2021	- -
Likely benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	Jul 27, 2017	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	1.4
DANN	Benign	0.69
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.90		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.90		Position offset: 2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs200576676; hg19: chr19-50918678;