16-68813495-G-T

Variant names:

• chr16-68813495-G-T
• rs1555515925
• NM_004360.5:c.1320G>T

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM2 PP3_Strong PP5_Moderate

The NM_001317185.2(CDH1):​c.-296G>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CDH1 NM_001317185.2 5_prime_UTR_premature_start_codon_gain
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 8.51

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 Likely_pathogenic. Variant got 8 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
• PP5: Variant 16-68813495-G-T is Pathogenic according to our data. Variant chr16-68813495-G-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 438812.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr16-68813495-G-T is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CDH1	NM_004360.5	c.1320G>T	p.Lys440Asn	missense_variant, splice_region_variant	Exon 9 of 16	ENST00000261769.10	NP_004351.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CDH1	ENST00000261769.10	c.1320G>T	p.Lys440Asn	missense_variant, splice_region_variant	Exon 9 of 16	1	NM_004360.5	ENSP00000261769.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Blepharocheilodontic syndrome 1 Pathogenic:1

Sep 20, 2017

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Familial cancer of breast;C0476089:Endometrial carcinoma;C1140680:Ovarian cancer;C1708349:Hereditary diffuse gastric adenocarcinoma;C4551988:Blepharocheilodontic syndrome 1 Pathogenic:1

Feb 21, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.52
BayesDel_addAF	Uncertain	0.063	T
BayesDel_noAF	Benign	-0.15
CADD	Pathogenic	35
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.54	D;T;T;.
Eigen	Pathogenic	0.97
Eigen_PC	Pathogenic	0.94
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.94	D;D;T;D
M_CAP	Uncertain	0.088	D
MetaRNN	Pathogenic	0.75	D;D;D;D
MetaSVM	Uncertain	-0.084	T
MutationAssessor	Pathogenic	3.0	M;.;.;.
PrimateAI	Uncertain	0.59	T
PROVEAN	Pathogenic	-4.5	D;.;.;.
REVEL	Uncertain	0.62
Sift	Uncertain	0.0010	D;.;.;.
Sift4G	Pathogenic	0.0010	D;D;D;D
Polyphen		1.0	D;.;.;.
Vest4		0.72
MutPred		0.77		Loss of ubiquitination at K440 (P = 0.0283);Loss of ubiquitination at K440 (P = 0.0283);Loss of ubiquitination at K440 (P = 0.0283);Loss of ubiquitination at K440 (P = 0.0283);
MVP		0.93
MPC		0.98
ClinPred		0.99	D
GERP RS		5.8
Varity_R		0.84
gMVP		0.85

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.99
SpliceAI score (max)		0.68		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.68		Position offset: 0

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs1555515925; hg19: chr16-68847398; COSMIC: COSV55728800; COSMIC: COSV55728800;