rs1555301269

chr12-132626299-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_006231.4(POLE):c.6349A>G(p.Asn2117Asp) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign 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. N2117S) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: POLE NM_006231.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.02

Genes affected

POLE (HGNC:9177): (DNA polymerase epsilon, catalytic subunit) This gene encodes the catalytic subunit of DNA polymerase epsilon. The enzyme is involved in DNA repair and chromosomal DNA replication. Mutations in this gene have been associated with colorectal cancer 12 and facial dysmorphism, immunodeficiency, livedo, and short stature. [provided by RefSeq, Sep 2013]

ACMG classification

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=0.41493937).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
POLE	NM_006231.4	c.6349A>G	p.Asn2117Asp	missense_variant	46/49	ENST00000320574.10
POLE	XM_011534795.4	c.6349A>G	p.Asn2117Asp	missense_variant	46/48
POLE	XM_011534797.4	c.5428A>G	p.Asn1810Asp	missense_variant	38/40
POLE	XM_011534802.4	c.3337A>G	p.Asn1113Asp	missense_variant	22/24

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
POLE	ENST00000320574.10	c.6349A>G	p.Asn2117Asp	missense_variant	46/49	1	NM_006231.4	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Mar 13, 2017

Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies. In summary, this variant is a novel missense change that is not predicted to affect protein function. There is no indication that it causes disease, but the available evidence is currently insufficient to prove that conclusively. Therefore, it has been classified as a Variant of Uncertain Significance. This sequence change replaces asparagine with aspartic acid at codon 2117 of the POLE protein (p.Asn2117Asp). The asparagine residue is moderately conserved and there is a small physicochemical difference between asparagine and aspartic acid. This variant is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a POLE-related disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.23
BayesDel_addAF	Benign	-0.090	T
BayesDel_noAF	Benign	-0.37
Cadd	Benign	23
Dann	Uncertain	0.99
DEOGEN2	Benign	0.082	T;.
Eigen	Benign	0.082
Eigen_PC	Benign	0.21
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.93	D;D
M_CAP	Benign	0.0068	T
MetaRNN	Benign	0.41	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.3	L;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Uncertain	0.69	T
PROVEAN	Benign	-2.1	N;N
REVEL	Benign	0.17
Sift	Benign	0.59	T;T
Sift4G	Benign	0.66	T;T
Polyphen		0.012	B;.
Vest4		0.69
MutPred		0.35		Gain of catalytic residue at D2115 (P = 0.0037);.;
MVP		0.34
MPC		0.22
ClinPred		0.94	D
GERP RS		4.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.27
gMVP		0.42

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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

Other links and lift over

dbSNP: rs1555301269; hg19: chr12-133202885; COSMIC: COSV100265420; COSMIC: COSV100265420;