rs142498771
Variant summary
Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BS2
This summary comes from the ClinGen Evidence Repository: The NM_004360.5(CDH1):c.394G>A (p.Val132Ile) variant has been observed in >10 individuals without a diagnosis of diffuse gastric cancer, signet ring tumor or lobular breast cancer and whose family histories do not suggest HDGC (BS2; internal laboratory contributors). In summary, the clinical significance of this variant is classified as likely benign based on BS2 alone. ACMG/AMP criteria applied, as specified by the CDH1 Variant Curation Expert Panel: BS2. (CDH1 VCEP specifications version 3.1; 04/24/2023) LINK:https://erepo.genome.network/evrepo/ui/classification/CA168677/MONDO:0100488/007
Frequency
Consequence
NM_004360.5 missense
Scores
Clinical Significance
Conservation
Publications
- blepharocheilodontic syndrome 1Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, Illumina, Labcorp Genetics (formerly Invitae), G2P
- CDH1-related diffuse gastric and lobular breast cancer syndromeInheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, G2P
- hereditary breast carcinomaInheritance: AD Classification: DEFINITIVE Submitted by: Ambry Genetics
- hereditary diffuse gastric adenocarcinomaInheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet
- cleft soft palateInheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
- orofacial cleft 3Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
- blepharocheilodontic syndromeInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
- familial ovarian cancerInheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
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ACMG classification
Our verdict: Likely_benign. The variant received -4 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
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CDH1 | NM_004360.5 | c.394G>A | p.Val132Ile | missense_variant | Exon 4 of 16 | ENST00000261769.10 | NP_004351.1 | |
CDH1 | NM_001317184.2 | c.394G>A | p.Val132Ile | missense_variant | Exon 4 of 15 | NP_001304113.1 | ||
CDH1 | NM_001317185.2 | c.-1222G>A | 5_prime_UTR_variant | Exon 4 of 16 | NP_001304114.1 | |||
CDH1 | NM_001317186.2 | c.-1426G>A | 5_prime_UTR_variant | Exon 4 of 15 | NP_001304115.1 |
Ensembl
Frequencies
GnomAD3 genomes AF: 0.000138 AC: 21AN: 152040Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.0000318 AC: 8AN: 251326 AF XY: 0.0000368 show subpopulations
GnomAD4 exome AF: 0.0000308 AC: 45AN: 1461864Hom.: 0 Cov.: 32 AF XY: 0.0000358 AC XY: 26AN XY: 727234 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.000138 AC: 21AN: 152158Hom.: 0 Cov.: 32 AF XY: 0.000121 AC XY: 9AN XY: 74366 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
Hereditary diffuse gastric adenocarcinoma Uncertain:2Benign:1
This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -
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This variant is classified as a variant of uncertain significance as there is insufficient evidence to determine its impact on protein function and/or cancer risk. -
Hereditary cancer-predisposing syndrome Benign:3
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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. -
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not provided Benign:2
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In silico analysis supports that this missense variant does not alter protein structure/function; Observed in individuals with breast or colorectal cancer (Tung 2015, Yurgelun 2017); This variant is associated with the following publications: (PMID: 28135145, 25186627) -
CDH1-related disorder Uncertain:1
The CDH1 c.394G>A variant is predicted to result in the amino acid substitution p.Val132Ile. This variant has been identified in an individual with breast cancer (Supplementary data, Tung et al. 2015. PubMed ID: 25186627), as well as in an individual with colorectal cancer (Table A4, Yurgelun et al. 2017. PubMed ID: 28135145). This variant is reported in 0.048% of alleles in individuals of African descent in gnomAD and has conflicting interpretations regarding its pathogenicity in ClinVar, ranging from benign to uncertain (https://www.ncbi.nlm.nih.gov/clinvar/variation/142546/). Although we suspect that this variant may be benign, at this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -
not specified Benign:1
Variant summary: CDH1 c.394G>A (p.Val132Ile) results in a conservative amino acid change in the encoded protein sequence. Five of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 5.3e-05 in 282708 control chromosomes, predominantly at a frequency of 0.00048 within the African or African-American subpopulation in the gnomAD database. The observed variant frequency within African or African-American control individuals in the gnomAD database is approximately 23 fold of the estimated maximal expected allele frequency for a pathogenic variant in CDH1 causing Hereditary Breast And Ovarian Cancer Syndrome phenotype (2.1e-05), strongly suggesting that the variant is a benign polymorphism found primarily in populations of African or African-American origin. c.394G>A has been reported in the literature in sequencing studies of individuals affected with breast cancer and colorectal cancer (example, Tung_2015, Yurgelun_2017). These report(s) do not provide unequivocal conclusions about association of the variant with Hereditary Breast And Ovarian Cancer Syndrome. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Seven clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. Multiple laboratories reported the variant with conflicting assessments (benign, n=1; likely benign, n=3; VUS, n=3) with an emerging consensus towards a benign outcome since its previous evaluation. Based on the evidence outlined above, the variant was re-classified as benign. -
CDH1-related diffuse gastric and lobular breast cancer syndrome Benign:1
The NM_004360.5(CDH1):c.394G>A (p.Val132Ile) variant has been observed in >10 individuals without a diagnosis of diffuse gastric cancer, signet ring tumor or lobular breast cancer and whose family histories do not suggest HDGC (BS2; internal laboratory contributors). In summary, the clinical significance of this variant is classified as likely benign based on BS2 alone. ACMG/AMP criteria applied, as specified by the CDH1 Variant Curation Expert Panel: BS2. (CDH1 VCEP specifications version 3.1; 04/24/2023) -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at