Genetic Variant ENST00000241436.9:c.170A>G (chr5-75552506-A-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The ENST00000241436.9(POLK):c.170A>G(p.Glu57Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000616 in 1,460,454 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000062 ( 0 hom. )

Consequence

POLK
ENST00000241436.9 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 8.96

Variant links:

Genes affected

POLK (HGNC:9183): (DNA polymerase kappa) This gene encodes a member of the DNA polymerase type-Y family of proteins. The encoded protein is a specialized DNA polymerase that catalyzes translesion DNA synthesis, which allows DNA replication in the presence of DNA lesions. Human cell lines lacking a functional copy of this gene exhibit impaired genome integrity and enhanced susceptibility to oxidative damage. Mutations in this gene that impair enzyme activity may be associated with prostate cancer in human patients. [provided by RefSeq, Sep 2016]

POLK links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	Protein
POLK	NM_001387111.3 link	c.170A>G	p.Glu57Gly	missense_variant	Exon 3 of 16	NP_001374040.1
POLK	NM_001395894.1 link	c.170A>G	p.Glu57Gly	missense_variant	Exon 4 of 17	NP_001382823.1
POLK	NM_001395897.1 link	c.170A>G	p.Glu57Gly	missense_variant	Exon 4 of 16	NP_001382826.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
POLK	ENST00000241436.9 link	c.170A>G	p.Glu57Gly	missense_variant	Exon 3 of 15	1		ENSP00000241436.4		Q9UBT6-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000616

AC:

AN:

1460454

Hom.:

Cov.:

AF XY:

0.00000551

AC XY:

AN XY:

726538

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

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:

0.00000810

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Nov 08, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.170A>G (p.E57G) alteration is located in exon 3 (coding exon 2) of the POLK gene. This alteration results from a A to G substitution at nucleotide position 170, causing the glutamic acid (E) at amino acid position 57 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

Uncertain

0.38

BayesDel_addAF

Uncertain

0.16

BayesDel_noAF

Uncertain

-0.010

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.46

T;T;.;.;.

Eigen

Uncertain

0.65

Eigen_PC

Uncertain

0.62

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.97

D;D;D;D;D

M_CAP

Benign

0.034

MetaRNN

Uncertain

0.64

D;D;D;D;D

MetaSVM

Benign

-0.32

MutationAssessor

Uncertain

2.7

M;.;M;M;M

PrimateAI

Uncertain

0.58

PROVEAN

Pathogenic

-4.5

D;D;D;D;D

REVEL

Uncertain

0.36

Sift

Uncertain

0.0020

D;D;D;D;D

Sift4G

Uncertain

0.0080

D;D;D;D;D

Polyphen

0.99

D;.;D;.;D

Vest4

0.44

MutPred

0.34

Loss of ubiquitination at K56 (P = 0.0236);Loss of ubiquitination at K56 (P = 0.0236);Loss of ubiquitination at K56 (P = 0.0236);Loss of ubiquitination at K56 (P = 0.0236);Loss of ubiquitination at K56 (P = 0.0236);

MVP

0.84

MPC

0.22

ClinPred

0.98

GERP RS

6.1

Varity_R

0.46

gMVP

0.22

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

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