chr16-68737420-G-T

Variant names:

• chr16-68737420-G-T
• rs878854692
• NM_004360.5:c.5G>T

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 1P and 0B. PM2_Supporting

This summary comes from the ClinGen Evidence Repository: The CDH1 c.5G>T (p.Gly2Val) variant is absent in the gnomAD cohort (PM2_Supporting; http://gnomad.broadinstitute.org). To our knowledge, this variant has not been reported in the literature. In summary, this variant meets criteria to be classified as a variant of uncertain significance based on the ACMG/AMP criteria applied as specified by the CDH1 Variant Curation Expert Panel (Variant Interpretation Guidelines Version 3.1): PM2_Supporting. LINK:https://erepo.genome.network/evrepo/ui/classification/CA10583400/MONDO:0007648/007

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: CDH1 NM_004360.5 missense
• Clinical Significance: Uncertain significance reviewed by expert panel U:5
• Conservation: PhyloP100: 1.96
• Publications: 5 publications found

Genes affected

CDH1 (HGNC:1748): (cadherin 1) This gene encodes a classical cadherin of the cadherin superfamily. Alternative splicing results in multiple transcript variants, at least one of which encodes a preproprotein that is proteolytically processed to generate the mature glycoprotein. This calcium-dependent cell-cell adhesion protein is comprised of five extracellular cadherin repeats, a transmembrane region and a highly conserved cytoplasmic tail. Mutations in this gene are correlated with gastric, breast, colorectal, thyroid and ovarian cancer. Loss of function of this gene is thought to contribute to cancer progression by increasing proliferation, invasion, and/or metastasis. The ectodomain of this protein mediates bacterial adhesion to mammalian cells and the cytoplasmic domain is required for internalization. This gene is present in a gene cluster with other members of the cadherin family on chromosome 16. [provided by RefSeq, Nov 2015]

CDH1 Gene-Disease associations (from GenCC):

• blepharocheilodontic syndrome 1

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, Illumina, Labcorp Genetics (formerly Invitae), G2P
• CDH1-related diffuse gastric and lobular breast cancer syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, G2P
• hereditary breast carcinoma

  Inheritance: AD Classification: DEFINITIVE Submitted by: Ambry Genetics
• hereditary diffuse gastric adenocarcinoma

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet
• cleft soft palate

  Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
• orofacial cleft 3

  Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
• blepharocheilodontic syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• familial ovarian cancer

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: For more information check the summary or visit ClinGen Evidence Repository.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004360.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CDH1	NM_004360.5	MANE Select	c.5G>T	p.Gly2Val	missense	Exon 1 of 16	NP_004351.1
	CDH1	NM_001317184.2		c.5G>T	p.Gly2Val	missense	Exon 1 of 15	NP_001304113.1
	CDH1	NM_001317185.2		c.-1611G>T		5_prime_UTR	Exon 1 of 16	NP_001304114.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CDH1	ENST00000261769.10	TSL:1 MANE Select	c.5G>T	p.Gly2Val	missense	Exon 1 of 16	ENSP00000261769.4
	CDH1	ENST00000422392.6	TSL:1	c.5G>T	p.Gly2Val	missense	Exon 1 of 15	ENSP00000414946.2
	CDH1	ENST00000566612.5	TSL:1	n.5G>T		non_coding_transcript_exon	Exon 1 of 15	ENSP00000454782.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00 AC: 0 AN: 128392 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 7.24e-7 AC: 1 AN: 1381472 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 681970

African (AFR) AF: 0.00 AC: 0 AN: 31242

American (AMR) AF: 0.00 AC: 0 AN: 35768

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25102

East Asian (EAS) AF: 0.00 AC: 0 AN: 35686

South Asian (SAS) AF: 0.0000127 AC: 1 AN: 78966

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 34416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4064

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1078538

Other (OTH) AF: 0.00 AC: 0 AN: 57690

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: reviewed by expert panel

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:2

May 27, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.G2V variant (also known as c.5G>T), located in coding exon 1 of the CDH1 gene, results from a G to T substitution at nucleotide position 5. The glycine at codon 2 is replaced by valine, an amino acid with dissimilar properties. This amino acid position is highly conserved in available vertebrate species. 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.

Nov 07, 2022

Color Diagnostics, LLC DBA Color Health

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This missense variant replaces glycine with valine at codon 2 of the CDH1 protein. To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with CDH1-related disorders in the literature. This variant has not been identified in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance.

Hereditary diffuse gastric adenocarcinoma Uncertain:1

Jul 18, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glycine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 2 of the CDH1 protein (p.Gly2Val). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with CDH1-related conditions. ClinVar contains an entry for this variant (Variation ID: 239909). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. 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.

not provided Uncertain:1

Aug 11, 2022

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge

CDH1-related diffuse gastric and lobular breast cancer syndrome Uncertain:1

Aug 21, 2023

ClinGen CDH1 Variant Curation Expert Panel

Significance: Uncertain significance

Review Status: reviewed by expert panel

Collection Method: curation

The CDH1 c.5G>T (p.Gly2Val) variant is absent in the gnomAD cohort (PM2_Supporting; http://gnomad.broadinstitute.org). To our knowledge, this variant has not been reported in the literature. In summary, this variant meets criteria to be classified as a variant of uncertain significance based on the ACMG/AMP criteria applied as specified by the CDH1 Variant Curation Expert Panel (Variant Interpretation Guidelines Version 3.1): PM2_Supporting.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.013	T
BayesDel_noAF	Benign	-0.26
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.71	D
Eigen	Uncertain	0.34
Eigen_PC	Uncertain	0.33
FATHMM_MKL	Benign	0.28	N
LIST_S2	Benign	0.62	T
M_CAP	Pathogenic	0.30	D
MetaRNN	Uncertain	0.50	T
MetaSVM	Benign	-0.79	T
MutationAssessor	Uncertain	2.5	M
PhyloP100		2.0
PrimateAI	Uncertain	0.56	T
PROVEAN	Benign	-2.1	N
REVEL	Benign	0.17
Sift	Uncertain	0.013	D
Sift4G	Pathogenic	0.0	D
Polyphen		0.96	D
Vest4		0.30
MutPred		0.42		Loss of disorder (P = 0.0821)
MVP		0.87
MPC		1.0
ClinPred		0.93	D
GERP RS		4.0
PromoterAI		-0.062	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.23
gMVP		0.62

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: rs878854692; hg19: chr16-68771323;