16-68810269-G-C

Variant names:

• chr16-68810269-G-C
• rs1555515445
• NM_004360.5:c.760G>C

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2_Supporting PS4_Supporting

This summary comes from the ClinGen Evidence Repository: The c.760G>C (p.Asp254His) variant is absent in the gnomAD cohort (PM2_Supporting). This variant has been reported in at least one family meeting HDGC clinical criteria (PS4_Supporting; internal laboratory contributor). In summary, the clinical significance of this variant is uncertain. ACMG/AMP criteria applied, as specified by the CDH1 Variant Curation Expert Panel (Variant Interpretation Guidelines Version 3.1): PM2_Supporting, PS4_Supporting. LINK:https://erepo.genome.network/evrepo/ui/classification/CA396458612/MONDO:0007648/007

• Frequency: Genomes: not found (cov: 31)
• Consequence: CDH1 NM_004360.5 missense
• Clinical Significance: Uncertain significance reviewed by expert panel U:2
• Conservation: PhyloP100: 9.60

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PS4: For more information check the summary or visit ClinGen Evidence Repository.
• PM2: For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CDH1	NM_004360.5	c.760G>C	p.Asp254His	missense_variant	Exon 6 of 16	ENST00000261769.10	NP_004351.1
CDH1	NM_001317184.2	c.760G>C	p.Asp254His	missense_variant	Exon 6 of 15		NP_001304113.1
CDH1	NM_001317185.2	c.-856G>C		5_prime_UTR_variant	Exon 6 of 16		NP_001304114.1
CDH1	NM_001317186.2	c.-1060G>C		5_prime_UTR_variant	Exon 6 of 15		NP_001304115.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CDH1	ENST00000261769.10	c.760G>C	p.Asp254His	missense_variant	Exon 6 of 16	1	NM_004360.5	ENSP00000261769.4

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: reviewed by expert panel

Submissions by phenotype

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 c.760G>C (p.Asp254His) variant is absent in the gnomAD cohort (PM2_Supporting). This variant has been reported in at least one family meeting HDGC clinical criteria (PS4_Supporting; internal laboratory contributor). In summary, the clinical significance of this variant is uncertain. ACMG/AMP criteria applied, as specified by the CDH1 Variant Curation Expert Panel (Variant Interpretation Guidelines Version 3.1): PM2_Supporting, PS4_Supporting. -

Hereditary cancer-predisposing syndrome Uncertain:1

May 13, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.D254H variant (also known as c.760G>C), located in coding exon 6 of the CDH1 gene, results from a G to C substitution at nucleotide position 760. The aspartic acid at codon 254 is replaced by histidine, an amino acid with similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Based on the available evidence, the clinical significance of this variant remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.48	D
BayesDel_noAF	Pathogenic	0.46
CADD	Pathogenic	30
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.68	D;T;T;.;.
Eigen	Pathogenic	1.0
Eigen_PC	Pathogenic	0.90
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Pathogenic	0.97	D;D;D;D;D
M_CAP	Pathogenic	0.41	D
MetaRNN	Pathogenic	0.98	D;D;D;D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	5.0	H;.;.;.;H
PrimateAI	Uncertain	0.66	T
PROVEAN	Pathogenic	-6.5	D;.;.;.;D
REVEL	Pathogenic	0.95
Sift	Uncertain	0.0010	D;.;.;.;D
Sift4G	Uncertain	0.017	D;D;D;D;D
Polyphen		1.0	D;.;.;.;.
Vest4		0.99
MutPred		0.84		Loss of loop (P = 0.1242);Loss of loop (P = 0.1242);Loss of loop (P = 0.1242);Loss of loop (P = 0.1242);Loss of loop (P = 0.1242);
MVP		0.98
MPC		0.99
ClinPred		1.0	D
GERP RS		5.2
Varity_R		0.97
gMVP		0.88

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs1555515445; hg19: chr16-68844172; COSMIC: COSV55735587; COSMIC: COSV55735587;