rs1060501229

chr16-68808444-A-Gchr16-68808444-A-T

Variant summary

Our verdict is Benign. Variant got -11 ACMG points: 2P and 13B. PM2 BP4_Strong BP6_Very_Strong BP7

The NM_004360.5(CDH1):c.408A>G(p.Gln136=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,461,874 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: CDH1 NM_004360.5 synonymous
• Clinical Significance: Likely benign reviewed by expert panel U:1 B:6
• Conservation: PhyloP100: -1.02

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 Benign. Variant got -11 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).
• BP6: Variant 16-68808444-A-G is Benign according to our data. Variant chr16-68808444-A-G is described in ClinVar as [Likely_benign]. Clinvar id is 406639.Status of the report is reviewed_by_expert_panel, 3 stars.
• BP7: Synonymous conserved (PhyloP=-1.02 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CDH1	NM_004360.5	c.408A>G	p.Gln136=	synonymous_variant	4/16	ENST00000261769.10
CDH1	NM_001317184.2	c.408A>G	p.Gln136=	synonymous_variant	4/15
CDH1	NM_001317185.2	c.-1208A>G		5_prime_UTR_variant	4/16
CDH1	NM_001317186.2	c.-1412A>G		5_prime_UTR_variant	4/15

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CDH1	ENST00000261769.10	c.408A>G	p.Gln136=	synonymous_variant	4/16	1	NM_004360.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251380 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135856

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000880

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461874 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727240

Gnomad4 AFR exome AF: 0.0000299

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000360

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000413 Hom.: 0

Bravo AF: 0.00000378

EpiCase AF: 0.000109

EpiControl AF: 0.00

ClinVar

Significance: Likely benign

Submissions summary: Uncertain:1 Benign:6

Revision: reviewed by expert panel

Submissions by phenotype

not provided Uncertain:1 Benign:1

Benign, criteria provided, single submitter	clinical testing	GeneDx	Jul 05, 2015	- -
Uncertain significance, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	Apr 19, 2017	- -

Hereditary cancer-predisposing syndrome Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Sep 29, 2020	- -
Likely benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Sep 09, 2015	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. -

not specified Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Aug 28, 2019

- -

Hereditary diffuse gastric adenocarcinoma Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Nov 07, 2023

- -

CDH1-related diffuse gastric and lobular breast cancer syndrome Benign:1

Likely benign, reviewed by expert panel

curation

ClinGen CDH1 Variant Curation Expert Panel

Sep 25, 2023

The c.408A>G (p.Gln136=) variant results in a synonymous change in exon 4 of CDH1. This is a silent variant that occurs at a position that is not highly conserved and for which splicing predictors do not suggest an impact on splicing (BP4, BP7). This variant is absent from the gnomAD population database v3.1.2. This variant was identified in 29 individuals without DGC, LBC, SRC tumours and whose families do not suggest HDGC (BS2; PMID: 30287823, 36436516, and internal laboratory contributors). In summary, this variant is classified as likely benign based on ACMG/AMP criteria applied as likely benign specified by the CDH1 Variant Curation Expert Panel: BS2, BP4, BP7. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
Cadd	Benign	0.17
Dann	Benign	0.25

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs1060501229; hg19: chr16-68842347;