16-68822081-C-T

Variant names:

• chr16-68822081-C-T
• rs121964877
• NM_004360.5:c.1792C>T

Variant summary

Our verdict is Pathogenic. The variant received 22 ACMG points: 22P and 0B. PM5_Supporting PVS1 PM2_Supporting PS2 PS4 PP1_Strong

This summary comes from the ClinGen Evidence Repository: The c.1792C>T (p.Arg598*) variant is predicted to result in a premature stop codon that leads to a truncated or absent protein (PVS1, PM5_Supporting). This variant is absent in the gnomAD cohort (PM2_Supporting; http://gnomad.broadinstitute.org). This variant was found to co-segregate with disease in multiple affected family members, with >7 meioses observed across at least two families (PP1_Strong; PMID:21696387, 16061854, 11419427 and SCV000275702.5). This variant has also been reported in at least four families meeting HDGC clinical criteria (PS4_Strong; PMID:9751616, 21696387, 16061854, 11419427). There is one known de novo observation of this variant with parental confirmation in a patient with diffuse gastric cancer and/or lobular breast cancer (PS2; PMID:21696387). In summary, this variant meets criteria to be classified as pathogenic based on the ACMG/AMP criteria applied as specified by the CDH1 Variant Curation Expert Panel (Variant Interpretation Guidelines Version 3.1): PVS1, PM2_Supporting, PP1_Strong, PS4, PS2, PM5_Supporting. LINK:https://erepo.genome.network/evrepo/ui/classification/CA281000/MONDO:0007648/007

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: CDH1 NM_001317186.2 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Pathogenic reviewed by expert panel P:16
• Conservation: PhyloP100: 5.42
• Publications: 39 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, Labcorp Genetics (formerly Invitae), G2P, Illumina
• CDH1-related diffuse gastric and lobular breast cancer syndrome

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

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

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics
• 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: Unknown Classification: NO_KNOWN Submitted by: ClinGen

ENSG00000260798 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 22 ACMG points.

• PVS1: For more information check the summary or visit ClinGen Evidence Repository.
• PS2: For more information check the summary or visit ClinGen Evidence Repository.
• PS4: For more information check the summary or visit ClinGen Evidence Repository.
• PM2: For more information check the summary or visit ClinGen Evidence Repository.
• PM5: For more information check the summary or visit ClinGen Evidence Repository.
• PP1: For more information check the summary or visit ClinGen Evidence Repository.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001317186.2. 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.1792C>T	p.Arg598*	stop_gained	Exon 12 of 16	NP_004351.1	A0A0U2ZQU7
	CDH1	NM_001317186.2		c.-174C>T		5_prime_UTR_premature_start_codon_gain	Exon 11 of 15	NP_001304115.1
	CDH1	NM_001317184.2		c.1609C>T	p.Arg537*	stop_gained	Exon 11 of 15	NP_001304113.1	P12830-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CDH1	ENST00000261769.10	TSL:1 MANE Select	c.1792C>T	p.Arg598*	stop_gained	Exon 12 of 16	ENSP00000261769.4	P12830-1
	CDH1	ENST00000422392.6	TSL:1	c.1609C>T	p.Arg537*	stop_gained	Exon 11 of 15	ENSP00000414946.2	P12830-2
	CDH1	ENST00000562836.5	TSL:1	n.1863C>T		non_coding_transcript_exon	Exon 11 of 15

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461874 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727240

African (AFR) AF: 0.00 AC: 0 AN: 33480

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

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

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

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111996

Other (OTH) AF: 0.00 AC: 0 AN: 60392

GnomAD4 genome Cov.: 31

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: reviewed by expert panel

Pathogenic	VUS	Benign	Condition
6	-	-	Hereditary diffuse gastric adenocarcinoma (6)
6	-	-	not provided (6)
2	-	-	Hereditary cancer-predisposing syndrome (2)
1	-	-	CDH1-related diffuse gastric and lobular breast cancer syndrome (1)
1	-	-	Familial cancer of breast (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.61	D
BayesDel_noAF	Pathogenic	0.63
CADD	Pathogenic	37
DANN	Uncertain	1.0
Eigen	Pathogenic	0.73
Eigen_PC	Uncertain	0.55
FATHMM_MKL	Pathogenic	0.99	D
PhyloP100		5.4
Vest4		0.88
GERP RS		5.3
Mutation Taster		=0/200	disease causing (ClinVar)

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: rs121964877; hg19: chr16-68855984; COSMIC: COSV55731120; COSMIC: COSV55731120;