rs115418995
Variant summary
Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2
This summary comes from the ClinGen Evidence Repository: The c.371G>A (p.Arg124His) missense variant has a frequency of 0.02010% in Africans (5/24870 alleles) in the gnomAD v2.1.1 cohort. This variant has been observed in ≥10 (31) individuals without DGC, SRC tumours or LBC and whose families do not suggest HDGC (BS2; SCV000637819.6, SCV000184938.6). In summary, the clinical significance of this variant is classified as of likely benign based the ACMG/AMP criteria applied, as specified by the CDH1 Variant Curation Expert Panel (Variant Interpretation Guidelines Version 3.1): BS2. LINK:https://erepo.genome.network/evrepo/ui/classification/CA294161/MONDO:0007648/007
Frequency
Consequence
NM_004360.5 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_benign. Variant got -4 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
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CDH1 | NM_004360.5 | c.371G>A | p.Arg124His | missense_variant | Exon 3 of 16 | ENST00000261769.10 | NP_004351.1 | |
CDH1 | NM_001317184.2 | c.371G>A | p.Arg124His | missense_variant | Exon 3 of 15 | NP_001304113.1 | ||
CDH1 | NM_001317185.2 | c.-1245G>A | 5_prime_UTR_variant | Exon 3 of 16 | NP_001304114.1 | |||
CDH1 | NM_001317186.2 | c.-1449G>A | 5_prime_UTR_variant | Exon 3 of 15 | NP_001304115.1 |
Ensembl
Frequencies
GnomAD3 genomes AF: 0.0000263 AC: 4AN: 152104Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.0000239 AC: 6AN: 250586Hom.: 0 AF XY: 0.0000295 AC XY: 4AN XY: 135496
GnomAD4 exome AF: 0.0000137 AC: 20AN: 1461182Hom.: 0 Cov.: 32 AF XY: 0.0000138 AC XY: 10AN XY: 726944
GnomAD4 genome AF: 0.0000263 AC: 4AN: 152222Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2AN XY: 74426
ClinVar
Submissions by phenotype
Hereditary diffuse gastric adenocarcinoma Uncertain:5
This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 124 of the CDH1 protein (p.Arg124His). This variant is present in population databases (rs115418995, gnomAD 0.02%). This missense change has been observed in individual(s) with CDH1-related conditions (PMID: 24493355, 28873162, 36436516). ClinVar contains an entry for this variant (Variation ID: 141538). An algorithm developed to predict the effect of missense changes on protein structure and function outputs the following: PolyPhen-2: "Benign". The histidine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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. -
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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. -
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PS4_Supporting (PMID: 30311375) -
not provided Uncertain:3
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In silico analysis supports that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 28873162, 15235021, 36436516, 24493355, 36243179) -
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Hereditary cancer-predisposing syndrome Benign:2
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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CDH1-related disorder Uncertain:1
The CDH1 c.371G>A variant is predicted to result in the amino acid substitution p.Arg124His. This variant was reported in an individual with diffuse gastric cancer (Molinaro et al. 2014. PubMed ID: 24493355). This variant is reported in 0.020% of alleles in individuals of African descent in gnomAD (http://gnomad.broadinstitute.org/variant/16-68835780-G-A), and is listed in ClinVar with confliciting interpretations of uncertain, likely benign and benign (https://www.ncbi.nlm.nih.gov/clinvar/variation/141538/). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -
Malignant tumor of breast Uncertain:1
The CDH1 p.Arg124His variant was identified in 1 of 64 proband chromosomes (frequency: 0.016) from individuals or families with diffuse gastric cancer (Molinaro 2014). The variant was also identified in dbSNP (ID: rs115418995) as "With Uncertain significance allele", ClinVar (classified as likely benign by Ambry Genetics and classified as uncertain significance by GeneDx, Invitae, Counsyl, and one other clinical laboratory), and in Zhejiang University Database (1x). The variant was not identified in Cosmic or MutDB databases. The variant was identified in control databases in 6 of 276422 chromosomes at a frequency of 0.00002 (Genome Aggregation Database Feb 27, 2017). The variant was observed in the following populations: African in 4 of 24004 chromosomes (freq: 0.0002), European in 1 of 126036 chromosomes (freq: 0.000008), and East Asian in 1 of 18866 chromosomes (freq: 0.00005), while the variant was not observed in the Other, Latino, Ashkenazi Jewish, Finnish, or South Asian populations. The p.Arg124 residue is not conserved in mammals and computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) do not suggest a high likelihood of impact to the protein; however, this information is not predictive enough to rule out pathogenicity. The variant occurs outside of the splicing consensus sequence and in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer) do not predict a difference in splicing. In addition, single-nucleotide primer extension and RT-PCR assays did not detect allelic imbalance or aberrant splicing (Molinaro 2014). In summary, based on the above information, the clinical significance of this variant cannot be determined with certainty at this time. This variant is classified as a variant of uncertain significance. -
Ovarian cancer Benign:1
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CDH1-related diffuse gastric and lobular breast cancer syndrome Benign:1
The c.371G>A (p.Arg124His) missense variant has a frequency of 0.02010% in Africans (5/24870 alleles) in the gnomAD v2.1.1 cohort. This variant has been observed in at least 10 (31) individuals without DGC, SRC tumours or LBC and whose families do not suggest HDGC (BS2; SCV000637819.6, SCV000184938.6). In summary, the clinical significance of this variant is classified as of likely benign based the ACMG/AMP criteria applied, as specified by the CDH1 Variant Curation Expert Panel (Variant Interpretation Guidelines Version 3.1): BS2. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at