16-68833300-C-T

Variant names:

• chr16-68833300-C-T
• rs587782024
• NM_004360.5:c.2450C>T

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BS2

This summary comes from the ClinGen Evidence Repository: The c.2450C>T (p.Ala817Val) variant results in a missense change in the last exon of CDH1. This variant is present at a frequency 3.3x10-5 (5 of 152,172 alleles) in the gnomAD population database v3.1.2. This variant has been observed in 104 individuals without DGC, LBC or SRC tumours and whose families do not suggest HDGC (BS2; internal laboratory contributors). In vitro studies of the A817V variant suggest reduced binding of B-catenin and reduced cell aggregation in a HEK293T cell model (PMID:33929593). However, evaluation of the use of functional data by the VCEP indicates that functional data currently available for missense variants cannot yet predict the pathogenicity of CDH1 variants, and it is therefore not considered in the classification for any CDH1 missense variant (Lee et al, 2018; PMID:30311375). As such, published information from in vitro or in vivo assays assessing impact on function for this missense variant has not been considered for variant curation. In summary, this variant is classified as likely benign based on ACMG/AMP criteria applied as specified by the CDH1 Variant Curation Expert Panel: BS2. LINK:https://erepo.genome.network/evrepo/ui/classification/CA166465/MONDO:0100488/007

• Frequency:
  • Genomes: 𝑓 0.000033 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000016 (0 hom.)
• Consequence: CDH1 NM_004360.5 missense
• Clinical Significance: Likely benign reviewed by expert panel U:7 B:3
• Conservation: PhyloP100: 7.91
• Publications: 13 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: Likely_benign. The variant received -4 ACMG points.

• BS2: 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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CDH1	NM_004360.5	MANE Select	c.2450C>T	p.Ala817Val	missense	Exon 16 of 16	NP_004351.1
	CDH1	NM_001317184.2		c.2267C>T	p.Ala756Val	missense	Exon 15 of 15	NP_001304113.1
	CDH1	NM_001317185.2		c.902C>T	p.Ala301Val	missense	Exon 16 of 16	NP_001304114.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CDH1	ENST00000261769.10	TSL:1 MANE Select	c.2450C>T	p.Ala817Val	missense	Exon 16 of 16	ENSP00000261769.4
	CDH1	ENST00000422392.6	TSL:1	c.2267C>T	p.Ala756Val	missense	Exon 15 of 15	ENSP00000414946.2
	CDH1	ENST00000562836.5	TSL:1	n.2521C>T		non_coding_transcript_exon	Exon 15 of 15

Frequencies

GnomAD3 genomes AF: 0.0000329 AC: 5 AN: 152172 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000588

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000239 AC: 6 AN: 251458 AF XY: 0.0000294

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: 0.0000352

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.0000164 AC: 24 AN: 1461674 Hom.: 0 Cov.: 32 AF XY: 0.0000165 AC XY: 12 AN XY: 727166

African (AFR) AF: 0.00 AC: 0 AN: 33476

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26130

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.0000232 AC: 2 AN: 86252

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53410

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 0.0000189 AC: 21 AN: 1111828

Other (OTH) AF: 0.0000166 AC: 1 AN: 60390

GnomAD4 genome AF: 0.0000329 AC: 5 AN: 152172 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74334

African (AFR) AF: 0.0000241 AC: 1 AN: 41452

American (AMR) AF: 0.00 AC: 0 AN: 15262

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5206

South Asian (SAS) AF: 0.00 AC: 0 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10602

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000588 AC: 4 AN: 68034

Other (OTH) AF: 0.00 AC: 0 AN: 2090

Alfa AF: 0.0000712 Hom.: 0

Bravo AF: 0.0000264

ExAC AF: 0.0000165 AC: 2

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

Revision: reviewed by expert panel

Pathogenic	VUS	Benign	Condition
-	1	1	Hereditary cancer-predisposing syndrome (2)
-	2	-	not provided (2)
-	1	-	Breast and/or ovarian cancer (1)
-	-	1	CDH1-related diffuse gastric and lobular breast cancer syndrome (1)
-	1	-	CDH1-related disorder (1)
-	1	-	Familial cancer of breast (1)
-	-	1	Hereditary diffuse gastric adenocarcinoma (1)
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.21
BayesDel_addAF	Pathogenic	0.16	D
BayesDel_noAF	Uncertain	0.090
CADD	Pathogenic	29
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.44	T
Eigen	Pathogenic	0.71
Eigen_PC	Pathogenic	0.67
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.96	D
M_CAP	Benign	0.080	D
MetaRNN	Benign	0.42	T
MetaSVM	Uncertain	0.19	D
MutationAssessor	Uncertain	2.6	M
PhyloP100		7.9
PrimateAI	Uncertain	0.69	T
PROVEAN	Uncertain	-3.0	D
REVEL	Uncertain	0.57
Sift	Uncertain	0.0070	D
Sift4G	Uncertain	0.033	D
Polyphen		1.0	D
Vest4		0.61
MutPred		0.60		Gain of methylation at K816 (P = 0.0385)
MVP		0.93
MPC		0.90
ClinPred		0.95	D
GERP RS		6.0
Varity_R		0.38
gMVP		0.58
Mutation Taster		=30/70	disease causing

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

Other links and lift over

dbSNP: rs587782024; hg19: chr16-68867203; COSMIC: COSV55732374;