2-47379944-C-G

Variant names:

• chr2-47379944-C-G
• rs778825812
• NM_002354.3:c.833C>G

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_002354.3(EPCAM):​c.833C>G​(p.Ala278Gly) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A278V) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: EPCAM NM_002354.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.64
• Publications: 1 publications found

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 Gene-Disease associations (from GenCC):

• Lynch syndrome

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
• Lynch syndrome 8

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, G2P, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
• congenital diarrhea 5 with tufting enteropathy

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P, Orphanet
• hereditary breast carcinoma

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.829

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002354.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EPCAM	NM_002354.3	MANE Select	c.833C>G	p.Ala278Gly	missense	Exon 7 of 9	NP_002345.2	P16422

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EPCAM	ENST00000263735.9	TSL:1 MANE Select	c.833C>G	p.Ala278Gly	missense	Exon 7 of 9	ENSP00000263735.4	P16422
	EPCAM	ENST00000405271.5	TSL:5	c.917C>G	p.Ala306Gly	missense	Exon 8 of 10	ENSP00000385476.1	B5MCA4
	EPCAM	ENST00000895681.1		c.833C>G	p.Ala278Gly	missense	Exon 7 of 9	ENSP00000565740.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.48
BayesDel_addAF	Uncertain	0.13	D
BayesDel_noAF	Uncertain	-0.040
CADD	Benign	23
DANN	Uncertain	1.0
DEOGEN2	Benign	0.39	T
Eigen	Uncertain	0.55
Eigen_PC	Uncertain	0.47
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.91	D
M_CAP	Benign	0.054	D
MetaRNN	Pathogenic	0.83	D
MetaSVM	Uncertain	0.32	D
MutationAssessor	Pathogenic	3.2	M
PhyloP100		4.6
PrimateAI	Uncertain	0.63	T
PROVEAN	Uncertain	-3.5	D
REVEL	Uncertain	0.39
Sift	Uncertain	0.010	D
Sift4G	Uncertain	0.022	D
Polyphen		1.0	D
Vest4		0.65
MutPred		0.33		Loss of stability (P = 0.0755)
MVP		0.68
MPC		0.092
ClinPred		0.98	D
GERP RS		5.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.31
gMVP		0.55
Mutation Taster		=44/56	disease causing

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

Other links and lift over

dbSNP: rs778825812; hg19: chr2-47607083;