rs1060501219

Positions:

• chr16-68812139-T-A
• chr16-68812139-T-C
• chr16-68812139-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 4P and 4B. PM1 PM2 BP4_Strong

The NM_004360.5(CDH1):​c.1013T>A​(p.Phe338Tyr) 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. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CDH1 NM_004360.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 0.279

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 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM1: In a domain Cadherin 2 (size 112) in uniprot entity CADH1_HUMAN there are 7 pathogenic changes around while only 3 benign (70%) in NM_004360.5
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.037987232).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CDH1	NM_004360.5	c.1013T>A	p.Phe338Tyr	missense_variant	8/16	ENST00000261769.10	NP_004351.1
CDH1	NM_001317184.2	c.1013T>A	p.Phe338Tyr	missense_variant	8/15		NP_001304113.1
CDH1	NM_001317185.2	c.-603T>A		5_prime_UTR_variant	8/16		NP_001304114.1
CDH1	NM_001317186.2	c.-807T>A		5_prime_UTR_variant	8/15		NP_001304115.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CDH1	ENST00000261769.10	c.1013T>A	p.Phe338Tyr	missense_variant	8/16	1	NM_004360.5	ENSP00000261769.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Hereditary diffuse gastric adenocarcinoma Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Apr 09, 2020

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. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The tyrosine amino acid residue is found in multiple mammalian species, suggesting that this missense change does not adversely affect protein function. These predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This variant has not been reported in the literature in individuals with CDH1-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change replaces phenylalanine with tyrosine at codon 338 of the CDH1 protein (p.Phe338Tyr). The phenylalanine residue is weakly conserved and there is a small physicochemical difference between phenylalanine and tyrosine. -

Hereditary cancer-predisposing syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 08, 2020

The p.F338Y variant (also known as c.1013T>A), located in coding exon 8 of the CDH1 gene, results from a T to A substitution at nucleotide position 1013. The phenylalanine at codon 338 is replaced by tyrosine, an amino acid with highly similar properties. This amino acid position is not well conserved in available vertebrate species, and tyrosine is the reference amino acid in other vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.078
BayesDel_addAF	Benign	-0.31	T
BayesDel_noAF	Benign	-0.69
CADD	Benign	7.3
DANN	Benign	0.72
DEOGEN2	Benign	0.17	T;T;T;.;.
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.073	N
LIST_S2	Benign	0.57	T;T;T;T;T
M_CAP	Benign	0.0053	T
MetaRNN	Benign	0.038	T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-0.24	N;.;.;.;N
PrimateAI	Benign	0.31	T
PROVEAN	Benign	-0.28	N;.;.;.;N
REVEL	Benign	0.019
Sift	Benign	0.18	T;.;.;.;T
Sift4G	Benign	0.56	T;T;T;T;T
Polyphen		0.0010	B;.;.;.;.
Vest4		0.19
MutPred		0.46		Gain of disorder (P = 0.0981);Gain of disorder (P = 0.0981);Gain of disorder (P = 0.0981);Gain of disorder (P = 0.0981);Gain of disorder (P = 0.0981);
MVP		0.41
MPC		0.29
ClinPred		0.038	T
GERP RS		1.9
Varity_R		0.29
gMVP		0.36

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		Details are displayed if max score is > 0.2

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

Publications

LitVar

Other links and lift over

dbSNP: rs1060501219; hg19: chr16-68846042;