Genetic Variant POLB:p.Glu129Gly (chr8-42355531-A-G) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_002690.3(POLB):c.386A>G(p.Glu129Gly) variant causes a missense change. The variant allele was found at a frequency of 0.0000133 in 1,582,230 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: 𝑓 0.000099 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000042 ( 0 hom. )

Consequence

POLB
NM_002690.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.96

Variant links:

Genes affected

POLB (HGNC:9174): (DNA polymerase beta) The protein encoded by this gene is a DNA polymerase involved in base excision and repair, also called gap-filling DNA synthesis. The encoded protein, acting as a monomer, is normally found in the cytoplasm, but it translocates to the nucleus upon DNA damage. Several transcript variants of this gene exist, but the full-length nature of only one has been described to date. [provided by RefSeq, Sep 2011]

POLB links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.28171593).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
POLB	NM_002690.3 link	c.386A>G	p.Glu129Gly	missense_variant	Exon 7 of 14	ENST00000265421.9	NP_002681.1	P06746

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
POLB	ENST00000265421.9 link	c.386A>G	p.Glu129Gly	missense_variant	Exon 7 of 14	1	NM_002690.3	ENSP00000265421.4		P06746

Frequencies

GnomAD3 genomes

AF:

0.0000985

AC:

AN:

152236

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000982

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000399

AC:

AN:

250416

Hom.:

AF XY:

0.00000738

AC XY:

AN XY:

135422

show subpopulations

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:

0.00

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.00000420

AC:

AN:

1429994

Hom.:

Cov.:

AF XY:

0.00000280

AC XY:

AN XY:

713646

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000113

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:

0.00

Gnomad4 OTH exome

AF:

0.0000169

GnomAD4 genome

AF:

0.0000985

AC:

AN:

152236

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74376

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000982

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.000144

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Nov 28, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.386A>G (p.E129G) alteration is located in exon 7 (coding exon 7) of the POLB gene. This alteration results from a A to G substitution at nucleotide position 386, causing the glutamic acid (E) at amino acid position 129 to be replaced by a glycine (G). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Benign

-0.082

BayesDel_noAF

Benign

-0.36

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.37

.;T;T

Eigen

Uncertain

0.31

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Uncertain

0.90

LIST_S2

Uncertain

0.94

D;D;D

M_CAP

Benign

0.013

MetaRNN

Benign

0.28

T;T;T

MetaSVM

Benign

-0.86

MutationAssessor

Benign

1.4

.;L;.

PrimateAI

Uncertain

0.71

PROVEAN

Uncertain

-3.9

D;D;D

REVEL

Benign

0.11

Sift

Uncertain

0.0050

D;D;D

Sift4G

Benign

0.064

T;T;T

Polyphen

0.92

.;P;.

Vest4

0.47

MutPred

0.48

.;Loss of loop (P = 0.0203);.;

MVP

0.44

MPC

0.88

ClinPred

0.98

GERP RS

5.3

Varity_R

0.45

gMVP

0.75

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over