16-68737418-G-C

Variant names:

• chr16-68737418-G-C
• rs878854691
• NM_004360.5:c.3G>C

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PS1_Moderate PM2

The ENST00000261769.10(CDH1):​c.3G>C​(p.Met1?) variant causes a start lost change involving the alteration of a non-conserved nucleotide. 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.

• Frequency: Genomes: not found (cov: 33)
• Consequence: CDH1 ENST00000261769.10 start_lost
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.00
• Publications: 0 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: Pathogenic. The variant received 12 ACMG points.

• PVS1: Start lost variant, next in-frame start position is after 176 pathogenic variants. Next in-frame start position is after 246 codons. Genomic position: 68810245. Lost 0.278 part of the original CDS.
• PS1: Another start lost variant in ENST00000261769.10 (CDH1) was described as [Pathogenic] in ClinVar
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000261769.10. 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.3G>C	p.Met1?	start_lost	Exon 1 of 16	NP_004351.1
	CDH1	NM_001317184.2		c.3G>C	p.Met1?	start_lost	Exon 1 of 15	NP_001304113.1
	CDH1	NM_001317185.2		c.-1613G>C		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.3G>C	p.Met1?	start_lost	Exon 1 of 16	ENSP00000261769.4
	CDH1	ENST00000422392.6	TSL:1	c.3G>C	p.Met1?	start_lost	Exon 1 of 15	ENSP00000414946.2
	CDH1	ENST00000566612.5	TSL:1	n.3G>C		non_coding_transcript_exon	Exon 1 of 15	ENSP00000454782.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.26	D
BayesDel_noAF	Uncertain	0.13
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.44	T
Eigen	Benign	-0.00073
Eigen_PC	Benign	0.12
FATHMM_MKL	Benign	0.46	N
LIST_S2	Uncertain	0.90	D
M_CAP	Pathogenic	0.96	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Benign	-0.95	T
PhyloP100		2.0
PROVEAN	Benign	-1.4	N
REVEL	Uncertain	0.29
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		0.13	B
Vest4		0.76
MutPred		1.0		Loss of disorder (P = 0.0796)
MVP		0.79
ClinPred		0.99	D
GERP RS		5.0
PromoterAI		-0.094	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.6
Varity_R		0.92
gMVP		0.62
Mutation Taster		=3/197	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: rs878854691; hg19: chr16-68771321;