NM_002691.4:c.899C>G

Variant names:

• chr19-50402670-C-G
• rs775463372
• NM_002691.4:c.899C>G

Variant summary

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

The NM_002691.4(POLD1):​c.899C>G​(p.Pro300Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. 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. P300S) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: POLD1 NM_002691.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.36
• 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: 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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	POLD1	NM_002691.4	MANE Select	c.899C>G	p.Pro300Arg	missense	Exon 8 of 27	NP_002682.2	P28340
	POLD1	NM_001308632.1		c.899C>G	p.Pro300Arg	missense	Exon 7 of 26	NP_001295561.1	M0R2B7
	POLD1	NM_001256849.1		c.899C>G	p.Pro300Arg	missense	Exon 8 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.899C>G	p.Pro300Arg	missense	Exon 8 of 27	ENSP00000406046.1	P28340
	POLD1	ENST00000595904.6	TSL:1	c.899C>G	p.Pro300Arg	missense	Exon 8 of 27	ENSP00000472445.1	M0R2B7
	POLD1	ENST00000599857.7	TSL:1	c.899C>G	p.Pro300Arg	missense	Exon 8 of 27	ENSP00000473052.1	P28340

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.67
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.41
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.47	T
Eigen	Uncertain	0.36
Eigen_PC	Uncertain	0.30
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.97	D
M_CAP	Benign	0.043	D
MetaRNN	Uncertain	0.47	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Pathogenic	3.1	M
PhyloP100		3.4
PrimateAI	Uncertain	0.48	T
PROVEAN	Pathogenic	-7.7	D
REVEL	Benign	0.18
Sift	Uncertain	0.0020	D
Sift4G	Uncertain	0.039	D
Polyphen		0.98	D
Vest4		0.48
MutPred		0.42		Loss of catalytic residue at P299 (P = 0.0121)
MVP		0.72
MPC		0.74
ClinPred		1.0	D
GERP RS		3.6
Varity_R		0.89
gMVP		0.59
Mutation Taster		=87/13	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs775463372; hg19: chr19-50905927;