rs199777048

Positions:

• chr12-132639279-C-A
• chr12-132639279-C-G
• chr12-132639279-C-T

Variant summary

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

The NM_006231.4(POLE):​c.5398G>T​(p.Val1800Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,770 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: 6.8e-7 (0 hom.)
• Consequence: POLE NM_006231.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.86

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]

POLE (HGNC:):

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	Protein	UniProt
POLE	NM_006231.4	c.5398G>T	p.Val1800Leu	missense_variant	40/49	ENST00000320574.10	NP_006222.2
POLE	XM_011534795.4	c.5398G>T	p.Val1800Leu	missense_variant	40/48		XP_011533097.1
POLE	XM_011534797.4	c.4477G>T	p.Val1493Leu	missense_variant	32/40		XP_011533099.1
POLE	XM_011534802.4	c.2386G>T	p.Val796Leu	missense_variant	16/24		XP_011533104.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
POLE	ENST00000320574.10	c.5398G>T	p.Val1800Leu	missense_variant	40/49	1	NM_006231.4	ENSP00000322570.5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461770 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727166

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: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Colorectal cancer, susceptibility to, 12 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 25, 2021

This sequence change replaces valine with leucine at codon 1800 of the POLE protein (p.Val1800Leu). The valine residue is moderately conserved and there is a small physicochemical difference between valine and leucine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals affected with POLE-related conditions. 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. 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.26
BayesDel_addAF	Uncertain	0.055	T
BayesDel_noAF	Benign	-0.16
CADD	Benign	21
DANN	Benign	0.97
DEOGEN2	Benign	0.047	T;.
Eigen	Uncertain	0.25
Eigen_PC	Uncertain	0.35
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.96	D;D
M_CAP	Benign	0.0097	T
MetaRNN	Uncertain	0.62	D;D
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.70	N;.
PrimateAI	Uncertain	0.61	T
PROVEAN	Benign	-0.64	N;N
REVEL	Benign	0.21
Sift	Benign	0.41	T;T
Sift4G	Benign	0.33	T;T
Polyphen		0.031	B;.
Vest4		0.76
MutPred		0.48		Gain of catalytic residue at V1800 (P = 0);.;
MVP		0.28
MPC		0.20
ClinPred		0.77	D
GERP RS		4.7
RBP_binding_hub_radar		0.92
RBP_regulation_power_radar		2.0
Varity_R		0.23
gMVP		0.43

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: chr12-133215865;