chr19-50416407-C-G

Variant names:

• chr19-50416407-C-G
• rs143974331
• NM_002691.4:c.2832C>G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_002691.4(POLD1):​c.2832C>G​(p.Phe944Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000215 in 1,396,956 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: POLD1 NM_002691.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: -1.06

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]

ENSG00000142539 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.31300992).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
POLD1	NM_002691.4	c.2832C>G	p.Phe944Leu	missense_variant	Exon 23 of 27	ENST00000440232.7	NP_002682.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
POLD1	ENST00000440232.7	c.2832C>G	p.Phe944Leu	missense_variant	Exon 23 of 27	1	NM_002691.4	ENSP00000406046.1
ENSG00000142539	ENST00000599632.1	c.39C>G	p.Phe13Leu	missense_variant	Exon 2 of 10	5		ENSP00000473233.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000647 AC: 1 AN: 154658 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 81894

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: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000168

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000215 AC: 3 AN: 1396956 Hom.: 0 Cov.: 31 AF XY: 0.00000145 AC XY: 1 AN XY: 689156

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: 0.00000278

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000540 Hom.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:1

Dec 18, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.F944L variant (also known as c.2832C>G), located in coding exon 22 of the POLD1 gene, results from a C to G substitution at nucleotide position 2832. The phenylalanine at codon 944 is replaced by leucine, an amino acid with highly similar 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. -

Colorectal cancer, susceptibility to, 10;C3715192:Mandibular hypoplasia-deafness-progeroid syndrome;C5935622:Immunodeficiency 120 Uncertain:1

Apr 13, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.95
BayesDel_addAF	Benign	-0.21	T
BayesDel_noAF	Benign	-0.52
CADD	Benign	16
DANN	Uncertain	0.99
DEOGEN2	Benign	0.38	T;.;.;T
Eigen	Benign	-0.64
Eigen_PC	Benign	-0.78
FATHMM_MKL	Benign	0.19	N
LIST_S2	Pathogenic	0.99	.;.;D;D
M_CAP	Uncertain	0.15	D
MetaRNN	Benign	0.31	T;T;T;T
MetaSVM	Benign	-0.74	T
MutationAssessor	Benign	1.8	L;.;.;L
PrimateAI	Pathogenic	0.85	D
PROVEAN	Uncertain	-4.3	D;.;.;.
REVEL	Benign	0.064
Sift	Uncertain	0.0010	D;.;.;.
Sift4G	Uncertain	0.0020	D;D;D;D
Polyphen		0.30	B;.;.;B
Vest4		0.43
MutPred		0.61		Loss of helix (P = 0.1299);.;.;Loss of helix (P = 0.1299);
MVP		0.48
MPC		0.93
ClinPred		0.95	D
GERP RS		-3.3
Varity_R		0.43
gMVP		0.45

Splicing

Name	Calibrated prediction	Score	Prediction
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

Other links and lift over

dbSNP: rs143974331; hg19: chr19-50919664;