16-68801894-G-A

Variant names:

• chr16-68801894-G-A
• rs587781919
• NM_004360.5:c.387+1G>A

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 3P and 1B. PS3_Supporting PVS1_Moderate BS2_Supporting

This summary comes from the ClinGen Evidence Repository: The c.387+1G>A variant is a canonical splice variant predicted to result in small in-frame amino acid deletions/insertions (PVS1_Moderate). This variant has an allele frequency of 0.00002 in gnomAD (4/245268) and is present with a frequency of 0.00012 (4/33552) in the Latino subpopulation (http://gnomad.broadinstitute.org). RT-PCR analysis demonstrated that this variant results in two additional in-frame transcripts, including a longer transcript with intronic retention of 57 bp and a shorter transcript with a 159 bp deletion (PS3_Supporting; https://jmd.amjpathol.org/article/S1525-1578(16)30178-7/pdf [G20]). This variant has also been reported in at least three individuals not meeting HDGC clinical criteria (BS2_Supporting; https://ascopubs.org/doi/full/10.1200/PO.16.00021, https://jmd.amjpathol.org/article/S1525-1578(16)30178-7/pdf [G20], PMID:26845104). In summary, this variant is classified as a variant of uncertain significance based on conflicting ACMG/AMP criteria applied as specified by the CDH1 Variant Curation Expert Panel (Variant Interpretation Guidelines Version 3.1): PVS1_Moderate, PS3_Supporting, BS2_Supporting. LINK:https://erepo.genome.network/evrepo/ui/classification/CA166072/MONDO:0007648/007

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000068 (0 hom.)
• Consequence: CDH1 NM_004360.5 splice_donor, intron
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Uncertain significance reviewed by expert panel U:11
• Conservation: PhyloP100: 5.28
• Publications: 4 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, Labcorp Genetics (formerly Invitae), G2P, Illumina
• CDH1-related diffuse gastric and lobular breast cancer syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), G2P
• hereditary breast carcinoma

  Inheritance: AD Classification: DEFINITIVE Submitted by: Ambry Genetics
• hereditary diffuse gastric adenocarcinoma

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics
• 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: Unknown Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PVS1: For more information check the summary or visit ClinGen Evidence Repository.
• PS3: For more information check the summary or visit ClinGen Evidence Repository.
• BS2: For more information check the summary or visit ClinGen Evidence Repository.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004360.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CDH1	NM_004360.5	MANE Select	c.387+1G>A		splice_donor intron	N/A	NP_004351.1	A0A0U2ZQU7
	CDH1	NM_001317184.2		c.387+1G>A		splice_donor intron	N/A	NP_001304113.1	P12830-2
	CDH1	NM_001317185.2		c.-1229+1G>A		splice_donor intron	N/A	NP_001304114.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CDH1	ENST00000261769.10	TSL:1 MANE Select	c.387+1G>A		splice_donor intron	N/A	ENSP00000261769.4	P12830-1
	CDH1	ENST00000422392.6	TSL:1	c.387+1G>A		splice_donor intron	N/A	ENSP00000414946.2	P12830-2
	CDH1	ENST00000562836.5	TSL:1	n.458+1G>A		splice_donor intron	N/A

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152220 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000160 AC: 4 AN: 250346 AF XY: 0.0000148

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000116

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 AF: 0.00000685 AC: 10 AN: 1460282 Hom.: 0 Cov.: 31 AF XY: 0.00000413 AC XY: 3 AN XY: 726600

African (AFR) AF: 0.00 AC: 0 AN: 33452

American (AMR) AF: 0.0000894 AC: 4 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26122

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86230

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53398

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5694

European-Non Finnish (NFE) AF: 0.00000540 AC: 6 AN: 1110650

Other (OTH) AF: 0.00 AC: 0 AN: 60318

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152220 Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1 AN XY: 74360

African (AFR) AF: 0.00 AC: 0 AN: 41452

American (AMR) AF: 0.0000655 AC: 1 AN: 15278

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5202

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10622

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68048

Other (OTH) AF: 0.00 AC: 0 AN: 2090

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000113

ExAC AF: 0.00000824 AC: 1

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: reviewed by expert panel

Pathogenic	VUS	Benign	Condition
-	4	-	Hereditary cancer-predisposing syndrome (4)
-	3	-	not provided (3)
-	2	-	Hereditary diffuse gastric adenocarcinoma (2)
-	1	-	CDH1-related diffuse gastric and lobular breast cancer syndrome (1)
-	1	-	Familial cancer of breast (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.21	T
BayesDel_noAF	Benign	-0.31
CADD	Uncertain	25
DANN	Benign	0.92
Eigen	Pathogenic	0.71
Eigen_PC	Uncertain	0.43
FATHMM_MKL	Uncertain	0.97	D
PhyloP100		5.3
GERP RS		4.3
Mutation Taster		=10/90	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.91
SpliceAI score (max)		1.0		Details are displayed if max score is > 0.2
DS_DL_spliceai		1.0		Position offset: -1

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

Other links and lift over

dbSNP: rs587781919; hg19: chr16-68835797;