rs1801025

Positions:

• chr16-68822033-C-A
• chr16-68822033-C-G
• chr16-68822033-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001317186.2(CDH1):​c.-222C>A variant causes a 5 prime UTR premature start codon gain 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. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: CDH1 NM_001317186.2 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.0870

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.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.25980228).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CDH1	NM_004360.5	c.1744C>A	p.Leu582Met	missense_variant	12/16	ENST00000261769.10	NP_004351.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CDH1	ENST00000261769.10	c.1744C>A	p.Leu582Met	missense_variant	12/16	1	NM_004360.5	ENSP00000261769.4

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary diffuse gastric adenocarcinoma Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 22, 2021

This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with CDH1-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). 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. This sequence change replaces leucine with methionine at codon 582 of the CDH1 protein (p.Leu582Met). The leucine residue is moderately conserved and there is a small physicochemical difference between leucine and methionine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.44
CADD	Benign	20
DANN	Uncertain	0.97
DEOGEN2	Benign	0.19	T;T;T;.;.
Eigen	Benign	-0.10
Eigen_PC	Benign	-0.22
FATHMM_MKL	Benign	0.15	N
LIST_S2	Benign	0.63	T;T;T;T;T
M_CAP	Benign	0.052	D
MetaRNN	Benign	0.26	T;T;T;T;T
MetaSVM	Benign	-0.66	T
MutationAssessor	Uncertain	2.0	M;.;.;.;.
PrimateAI	Benign	0.45	T
PROVEAN	Benign	-0.56	N;.;.;.;N
REVEL	Benign	0.20
Sift	Benign	0.22	T;.;.;.;T
Sift4G	Benign	0.23	T;T;T;T;T
Polyphen		0.79	P;.;.;.;.
Vest4		0.27
MutPred		0.44		Loss of catalytic residue at L582 (P = 0.004);Loss of catalytic residue at L582 (P = 0.004);.;Loss of catalytic residue at L582 (P = 0.004);.;
MVP		0.70
MPC		0.85
ClinPred		0.37	T
GERP RS		4.6
Varity_R		0.039
gMVP		0.33

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

Publications

LitVar

Other links and lift over

dbSNP: rs1801025; hg19: chr16-68855936;