chr16-68815695-G-T

Variant names:

• chr16-68815695-G-T
• rs368690400
• NM_004360.5:c.1501G>T

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP6

The NM_004360.5(CDH1):​c.1501G>T​(p.Val501Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V501M) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CDH1 NM_004360.5 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:1
• Conservation: PhyloP100: 1.87
• Publications: 7 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

ENSG00000260798 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.23130721).
• BP6: Variant 16-68815695-G-T is Benign according to our data. Variant chr16-68815695-G-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 935181.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CDH1	NM_004360.5	c.1501G>T	p.Val501Leu	missense_variant	Exon 10 of 16	ENST00000261769.10	NP_004351.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CDH1	ENST00000261769.10	c.1501G>T	p.Val501Leu	missense_variant	Exon 10 of 16	1	NM_004360.5	ENSP00000261769.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251476 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Hereditary diffuse gastric adenocarcinoma Uncertain:1

Oct 27, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces valine, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 501 of the CDH1 protein (p.Val501Leu). This variant is present in population databases (rs368690400, gnomAD 0.003%). This variant has not been reported in the literature in individuals affected with CDH1-related conditions. ClinVar contains an entry for this variant (Variation ID: 935181). An algorithm developed to predict the effect of missense changes on protein structure and function outputs the following: PolyPhen-2: "Benign". The leucine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

not provided Uncertain:1

Mar 27, 2024

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The CDH1 c.1501G>T (p.Val501Leu) variant has not been reported in individuals with CDH1-related conditions in the published literature. The frequency of this variant in the general population, 0.000004 (1/251476 chromosomes (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is uninformative in the assessment of its pathogenicity. Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded predictions that this variant is benign. Based on the available information, we are unable to determine the clinical significance of this variant. -

Hereditary cancer-predisposing syndrome Benign:1

Dec 06, 2023

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.41
CADD	Benign	19
DANN	Uncertain	0.99
DEOGEN2	Benign	0.31	T;T;T;.;.
Eigen	Benign	-0.19
Eigen_PC	Benign	-0.17
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Benign	0.78	T;T;T;T;T
M_CAP	Benign	0.017	T
MetaRNN	Benign	0.23	T;T;T;T;T
MetaSVM	Benign	-0.98	T
MutationAssessor	Uncertain	2.1	M;.;.;.;.
PhyloP100		1.9
PrimateAI	Benign	0.35	T
PROVEAN	Benign	-1.7	N;.;.;.;N
REVEL	Benign	0.071
Sift	Benign	0.16	T;.;.;.;T
Sift4G	Benign	0.16	T;T;T;T;T
Polyphen		0.0060	B;.;.;.;.
Vest4		0.18
MutPred		0.53		Loss of catalytic residue at Q503 (P = 0.1564);Loss of catalytic residue at Q503 (P = 0.1564);.;Loss of catalytic residue at Q503 (P = 0.1564);.;
MVP		0.82
MPC		0.25
ClinPred		0.65	D
GERP RS		3.5
Varity_R		0.064
gMVP		0.32

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: rs368690400; hg19: chr16-68849598;