2-47369516-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_002354.3(EPCAM):c.11C>G(p.Pro4Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000142 in 1,411,234 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. P4L) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: EPCAM NM_002354.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.251

Genes affected

EPCAM (HGNC:11529): (epithelial cell adhesion molecule) This gene encodes a carcinoma-associated antigen and is a member of a family that includes at least two type I membrane proteins. This antigen is expressed on most normal epithelial cells and gastrointestinal carcinomas and functions as a homotypic calcium-independent cell adhesion molecule. The antigen is being used as a target for immunotherapy treatment of human carcinomas. Mutations in this gene result in congenital tufting enteropathy. [provided by RefSeq, Dec 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.1611779).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EPCAM	NM_002354.3	c.11C>G	p.Pro4Arg	missense_variant	1/9	ENST00000263735.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EPCAM	ENST00000263735.9	c.11C>G	p.Pro4Arg	missense_variant	1/9	1	NM_002354.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000142 AC: 2 AN: 1411234 Hom.: 0 Cov.: 31 AF XY: 0.00000143 AC XY: 1 AN XY: 698524

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: 0.00000183

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000854 AC: 1

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

Mar 27, 2022

The p.P4R variant (also known as c.11C>G), located in coding exon 1 of the EPCAM gene, results from a C to G substitution at nucleotide position 11. The proline at codon 4 is replaced by arginine, an amino acid with dissimilar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. 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	0.067
BayesDel_addAF	Uncertain	0.037	T
BayesDel_noAF	Benign	-0.18
Cadd	Benign	11
Dann	Benign	0.65
DEOGEN2	Benign	0.20	T;.
Eigen	Benign	-0.58
Eigen_PC	Benign	-0.76
FATHMM_MKL	Benign	0.10	N
LIST_S2	Benign	0.40	T;T
M_CAP	Pathogenic	0.87	D
MetaRNN	Benign	0.16	T;T
MetaSVM	Benign	-0.52	T
MutationAssessor	Uncertain	2.3	M;.
MutationTaster	Benign	1.0	N;N
PrimateAI	Uncertain	0.68	T
PROVEAN	Benign	-1.7	N;N
REVEL	Benign	0.23
Sift	Benign	0.69	T;D
Sift4G	Benign	0.087	T;D
Polyphen		0.94	P;.
Vest4		0.28
MutPred		0.27		Loss of loop (P = 0.0073);Loss of loop (P = 0.0073);
MVP		0.36
MPC		0.013
ClinPred		0.21	T
GERP RS		1.2
Varity_R		0.042
gMVP		0.65

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

Other links and lift over

dbSNP: rs778641299; hg19: chr2-47596655;