chr2-47378971-A-T

Position:

chr2-47378971-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 4P and 2B. PM1PM2BP4_Moderate

The NM_002354.3(EPCAM):c.574A>T(p.Thr192Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000214 in 1,545,022 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000021 ( 0 hom. )

Consequence

EPCAM
NM_002354.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 1.96

Variant links:

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]

EPCAM links:

EPCAM (HGNC:):

EPCAM links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM1

In a topological_domain Extracellular (size 241) in uniprot entity EPCAM_HUMAN there are 12 pathogenic changes around while only 2 benign (86%) in NM_002354.3

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.16377142).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
EPCAM	NM_002354.3 linkuse as main transcript	c.574A>T	p.Thr192Ser	missense_variant	6/9	ENST00000263735.9	NP_002345.2	P16422

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
EPCAM	ENST00000263735.9 linkuse as main transcript	c.574A>T	p.Thr192Ser	missense_variant	6/9	1	NM_002354.3	ENSP00000263735.4	P16422
EPCAM	ENST00000405271.5 linkuse as main transcript	c.658A>T	p.Thr220Ser	missense_variant	7/10	5		ENSP00000385476.1	B5MCA4
EPCAM	ENST00000456133.5 linkuse as main transcript	n.658A>T		non_coding_transcript_exon_variant	7/11	5		ENSP00000410675.1	B5MCA4
EPCAM	ENST00000490733.1 linkuse as main transcript	n.423A>T		non_coding_transcript_exon_variant	4/6	3

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152200

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00115

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000518

AC:

AN:

251062

Hom.:

AF XY:

0.0000589

AC XY:

AN XY:

135746

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000116

Gnomad ASJ exome

AF:

0.000595

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000881

Gnomad OTH exome

AF:

0.000327

GnomAD4 exome

AF:

0.0000208

AC:

AN:

1392822

Hom.:

Cov.:

AF XY:

0.0000272

AC XY:

AN XY:

697262

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000112

Gnomad4 ASJ exome

AF:

0.000546

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000191

Gnomad4 OTH exome

AF:

0.000138

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152200

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74354

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00115

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000240

Hom.:

Bravo

AF:

0.0000416

ExAC

AF:

0.0000330

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Lynch syndrome 8;C2750737:Congenital diarrhea 5 with tufting enteropathy

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Oct 27, 2021

- -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 18, 2016

This sequence change replaces threonine with serine at codon 192 of the EPCAM protein (p.Thr192Ser). The threonine residue is highly conserved and there is a small physicochemical difference between threonine and serine. This variant is present in population databases (rs587780769, ExAC 0.006%) but has not been reported in the literature in individuals with a EPCAM-related disease. ClinVar contains an entry for this variant (Variation ID: 136026). 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 is a rare missense change that is not predicted to affect protein function or cause disease. However, the evidence is insufficient at this time to prove that conclusively. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.22

BayesDel_addAF

Benign

-0.22

BayesDel_noAF

Benign

-0.33

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.034

T;T

Eigen

Benign

0.057

Eigen_PC

Benign

0.11

FATHMM_MKL

Uncertain

0.79

LIST_S2

Benign

0.29

.;T

M_CAP

Benign

0.024

MetaRNN

Benign

0.16

T;T

MetaSVM

Benign

-0.84

MutationAssessor

Uncertain

2.7

.;M

PrimateAI

Benign

0.45

PROVEAN

Benign

-1.8

N;N

REVEL

Benign

0.061

Sift

Benign

0.21

T;T

Sift4G

Benign

0.38

T;T

Polyphen

0.79

P;P

Vest4

0.53

MutPred

0.32

Gain of sheet (P = 0.0344);.;

MVP

0.62

MPC

0.024

ClinPred

0.070

GERP RS

3.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.19

gMVP

0.21

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over