19-50402065-G-T

Variant names:

• chr19-50402065-G-T
• rs3218750
• NM_002691.4:c.530G>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_002691.4(POLD1):​c.530G>T​(p.Arg177Leu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R177H) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: POLD1 NM_002691.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.66
• 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):

• 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

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	POLD1	NM_002691.4	MANE Select	c.530G>T	p.Arg177Leu	missense	Exon 5 of 27	NP_002682.2
	POLD1	NM_001308632.1		c.530G>T	p.Arg177Leu	missense	Exon 4 of 26	NP_001295561.1
	POLD1	NM_001256849.1		c.530G>T	p.Arg177Leu	missense	Exon 5 of 27	NP_001243778.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	POLD1	ENST00000440232.7	TSL:1 MANE Select	c.530G>T	p.Arg177Leu	missense	Exon 5 of 27	ENSP00000406046.1
	POLD1	ENST00000595904.6	TSL:1	c.530G>T	p.Arg177Leu	missense	Exon 5 of 27	ENSP00000472445.1
	POLD1	ENST00000599857.7	TSL:1	c.530G>T	p.Arg177Leu	missense	Exon 5 of 27	ENSP00000473052.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.35
BayesDel_addAF	Benign	-0.062	T
BayesDel_noAF	Benign	-0.33
CADD	Uncertain	23
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.45	T
Eigen	Benign	0.18
Eigen_PC	Benign	0.14
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.86	D
M_CAP	Benign	0.076	D
MetaRNN	Uncertain	0.73	D
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.8	M
PhyloP100		4.7
PrimateAI	Uncertain	0.55	T
PROVEAN	Pathogenic	-6.1	D
REVEL	Benign	0.20
Sift	Uncertain	0.025	D
Sift4G	Uncertain	0.041	D
Polyphen		0.41	B
Vest4		0.60
MutPred		0.65		Loss of disorder (P = 0.0514)
MVP		0.58
MPC		0.83
ClinPred		0.99	D
GERP RS		3.0
RBP_binding_hub_radar		0.92
RBP_regulation_power_radar		2.1
Varity_R		0.40
gMVP		0.66
Mutation Taster		=13/87	disease causing

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: rs3218750; hg19: chr19-50905322;