rs1555792887

Variant names:

• chr19-50414953-C-T
• rs1555792887
• NM_002691.4:c.2527C>T

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP6

The NM_002691.4(POLD1):​c.2527C>T​(p.Leu843Leu) variant causes a synonymous change. The variant allele was found at a frequency of 0.000000688 in 1,453,722 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 Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. L843L) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: POLD1 NM_002691.4 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:2
• Conservation: PhyloP100: 3.66
• Publications: 0 publications found

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):

• mandibular hypoplasia-deafness-progeroid syndrome

  Inheritance: AD, AR Classification: DEFINITIVE, STRONG, SUPPORTIVE, LIMITED Submitted by: G2P, Orphanet, Ambry Genetics, Labcorp Genetics (formerly Invitae), ClinGen, Genomics England PanelApp
• 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: Ambry Genetics, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
• 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

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.34).
• BP6: Variant 19-50414953-C-T is Benign according to our data. Variant chr19-50414953-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 537160.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002691.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	POLD1	NM_002691.4	MANE Select	c.2527C>T	p.Leu843Leu	synonymous	Exon 20 of 27	NP_002682.2	P28340
	POLD1	NM_001308632.1		c.2605C>T	p.Leu869Leu	synonymous	Exon 19 of 26	NP_001295561.1	M0R2B7
	POLD1	NM_001256849.1		c.2527C>T	p.Leu843Leu	synonymous	Exon 20 of 27	NP_001243778.1	P28340

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	POLD1	ENST00000440232.7	TSL:1 MANE Select	c.2527C>T	p.Leu843Leu	synonymous	Exon 20 of 27	ENSP00000406046.1	P28340
	POLD1	ENST00000595904.6	TSL:1	c.2605C>T	p.Leu869Leu	synonymous	Exon 20 of 27	ENSP00000472445.1	M0R2B7
	POLD1	ENST00000599857.7	TSL:1	c.2527C>T	p.Leu843Leu	synonymous	Exon 20 of 27	ENSP00000473052.1	P28340

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.88e-7 AC: 1 AN: 1453722 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 722650

African (AFR) AF: 0.00 AC: 0 AN: 33312

American (AMR) AF: 0.00 AC: 0 AN: 43974

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25880

East Asian (EAS) AF: 0.0000254 AC: 1 AN: 39404

South Asian (SAS) AF: 0.00 AC: 0 AN: 85514

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52336

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5734

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1107598

Other (OTH) AF: 0.00 AC: 0 AN: 59970

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	-	1	Colorectal cancer, susceptibility to, 10 (1)
-	-	1	Hereditary cancer-predisposing syndrome (1)
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.34
CADD	Benign	10
DANN	Benign	0.93
PhyloP100		3.7
Mutation Taster		=87/13	polymorphism

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

Other links and lift over

dbSNP: rs1555792887; hg19: chr19-50918210;