rs1060501817
Positions:
Variant summary
Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate
The NM_002691.4(POLD1):c.649C>G(p.Pro217Ala) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P217L) has been classified as Uncertain significance.
Frequency
Genomes: not found (cov: 33)
Consequence
POLD1
NM_002691.4 missense
NM_002691.4 missense
Scores
5
10
3
Clinical Significance
Conservation
PhyloP100: 7.16
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]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 4 ACMG points.
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
MetaRNN computational evidence supports a deleterious effect, 0.913
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
POLD1 | NM_002691.4 | c.649C>G | p.Pro217Ala | missense_variant | 6/27 | ENST00000440232.7 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
POLD1 | ENST00000440232.7 | c.649C>G | p.Pro217Ala | missense_variant | 6/27 | 1 | NM_002691.4 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 33
GnomAD3 genomes
?
Cov.:
33
GnomAD4 exome Cov.: 34
GnomAD4 exome
Cov.:
34
GnomAD4 genome ? Cov.: 33
GnomAD4 genome
?
Cov.:
33
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Colorectal cancer, susceptibility to, 10 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Apr 10, 2019 | In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals with POLD1-related conditions. ClinVar contains an entry for this variant (Variation ID: 407994). This variant is not present in population databases (ExAC no frequency). This sequence change replaces proline with alanine at codon 217 of the POLD1 protein (p.Pro217Ala). The proline residue is highly conserved and there is a small physicochemical difference between proline and alanine. - |
Hereditary cancer-predisposing syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Sep 08, 2022 | The p.P217A variant (also known as c.649C>G), located in coding exon 5 of the POLD1 gene, results from a C to G substitution at nucleotide position 649. The proline at codon 217 is replaced by alanine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Uncertain
D
BayesDel_noAF
Benign
CADD
Uncertain
DANN
Uncertain
DEOGEN2
Uncertain
D;.;.;D
Eigen
Uncertain
Eigen_PC
Uncertain
FATHMM_MKL
Pathogenic
D
M_CAP
Uncertain
D
MetaRNN
Pathogenic
D;D;D;D
MetaSVM
Benign
T
MutationAssessor
Pathogenic
M;.;.;M
MutationTaster
Benign
D
PrimateAI
Uncertain
T
PROVEAN
Pathogenic
D;.;.;.
REVEL
Uncertain
Sift
Uncertain
D;.;.;.
Sift4G
Uncertain
D;D;D;D
Polyphen
D;.;.;D
Vest4
MutPred
Loss of stability (P = 0.027);Loss of stability (P = 0.027);Loss of stability (P = 0.027);Loss of stability (P = 0.027);
MVP
MPC
ClinPred
D
GERP RS
RBP_binding_hub_radar
RBP_regulation_power_radar
Varity_R
gMVP
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at