12-132649826-C-A

Position:

• chr12-132649826-C-A

Variant summary

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

The NM_006231.4(POLE):​c.3646G>T​(p.Gly1216Cys) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: POLE NM_006231.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.55

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 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.3646G>T	p.Gly1216Cys	missense_variant	30/49	ENST00000320574.10	NP_006222.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
POLE	ENST00000320574.10	c.3646G>T	p.Gly1216Cys	missense_variant	30/49	1	NM_006231.4	ENSP00000322570	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 16, 2023

The p.G1216C variant (also known as c.3646G>T), located in coding exon 30 of the POLE gene, results from a G to T substitution at nucleotide position 3646. The glycine at codon 1216 is replaced by cysteine, an amino acid with highly dissimilar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Uncertain	0.055	T
BayesDel_noAF	Benign	-0.16
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.56	D;.
Eigen	Benign	-0.015
Eigen_PC	Benign	0.10
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.83	T;T
M_CAP	Benign	0.012	T
MetaRNN	Uncertain	0.66	D;D
MetaSVM	Benign	-1.1	T
MutationAssessor	Pathogenic	3.1	M;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.54	T
PROVEAN	Uncertain	-3.8	D;D
REVEL	Benign	0.16
Sift	Uncertain	0.0040	D;D
Sift4G	Benign	0.079	T;T
Polyphen		0.017	B;B
Vest4		0.83
MutPred		0.36		Gain of catalytic residue at L1217 (P = 0.0016);.;
MVP		0.50
MPC		0.21
ClinPred		0.99	D
GERP RS		5.0
Varity_R		0.33
gMVP		0.63

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: rs200114024; hg19: chr12-133226412;