4-2072981-T-A

Position:

• chr4-2072981-T-A

Variant summary

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

The NM_181808.4(POLN):​c.2504A>T​(p.Glu835Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: POLN NM_181808.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -1.28

Genes affected

POLN (HGNC:18870): (DNA polymerase nu) This gene encodes a DNA polymerase type-A family member. The encoded protein plays a role in DNA repair and homologous recombination. This gene shares its 5' exons with some transcripts from overlapping GeneID: 79441, which encodes an augmentin-like protein complex subunit. [provided by RefSeq, Dec 2014]

ACMG classification

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/exons	MANE	UniProt
POLN	NM_181808.4	c.2504A>T	p.Glu835Val	missense_variant	25/26	ENST00000511885.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
POLN	ENST00000511885.6	c.2504A>T	p.Glu835Val	missense_variant	25/26	5	NM_181808.4	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 22, 2023

The c.2504A>T (p.E835V) alteration is located in exon 23 (coding exon 23) of the POLN gene. This alteration results from a A to T substitution at nucleotide position 2504, causing the glutamic acid (E) at amino acid position 835 to be replaced by a valine (V). 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	0.15
BayesDel_addAF	Benign	-0.23	T
BayesDel_noAF	Benign	-0.57
CADD	Benign	17
DANN	Uncertain	0.98
DEOGEN2	Benign	0.18	T;T
Eigen	Benign	-0.17
Eigen_PC	Benign	-0.32
FATHMM_MKL	Benign	0.20	N
LIST_S2	Benign	0.53	T;.
M_CAP	Benign	0.011	T
MetaRNN	Uncertain	0.45	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.69	N;N
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.34	T
PROVEAN	Benign	-1.5	N;N
REVEL	Benign	0.11
Sift	Benign	0.052	T;T
Sift4G	Benign	0.091	T;T
Polyphen		0.97	D;D
Vest4		0.38
MutPred		0.66		Gain of sheet (P = 0.0344);Gain of sheet (P = 0.0344);
MVP		0.57
MPC		0.35
ClinPred		0.50	T
GERP RS		1.7
Varity_R		0.25
gMVP		0.41

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr4-2074708;