NM_001943.5(DSG2):c.545A>G (p.Asn182Ser) AND not specified

Clinical significance:Likely benign (Last evaluated: Nov 25, 2019)

Review status:2 stars out of maximum of 4 stars

criteria provided, multiple submitters, no conflicts

Based on:
2 submissions [Details]
Record status:
current
Accession:
RCV000037311.7

Allele description [Variation Report for NM_001943.5(DSG2):c.545A>G (p.Asn182Ser)]

NM_001943.5(DSG2):c.545A>G (p.Asn182Ser)

Gene:
DSG2:desmoglein 2 [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
18q12.1
Genomic location:
Preferred name:
NM_001943.5(DSG2):c.545A>G (p.Asn182Ser)
HGVS:
  • NC_000018.10:g.31522104A>G
  • NG_007072.3:g.28863A>G
  • NM_001943.5:c.545A>GMANE SELECT
  • NP_001934.2:p.Asn182Ser
  • LRG_397t1:c.545A>G
  • LRG_397:g.28863A>G
  • NC_000018.9:g.29102067A>G
  • NM_001943.3:c.545A>G
  • NM_001943.4:c.545A>G
  • c.545A>G
Protein change:
N182S
Links:
dbSNP: rs368512832
NCBI 1000 Genomes Browser:
rs368512832
Molecular consequence:
  • NM_001943.5:c.545A>G - missense variant - [Sequence Ontology: SO:0001583]
Observations:
3

Condition(s)

Synonyms:
AllHighlyPenetrant
Identifiers:
MedGen: CN169374

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Assertion and evidence details

Submission AccessionSubmitterReview Status
(Assertion method)
Clinical Significance
(Last evaluated)
OriginMethodCitations
SCV000060968Laboratory for Molecular Medicine, Partners HealthCare Personalized Medicinecriteria provided, single submitter
Likely benign
(Apr 13, 2015)
germlineclinical testing

PubMed (1)
[See all records that cite this PMID]

SCV001361557Women's Health and Genetics/Laboratory Corporation of America, LabCorpcriteria provided, single submitter
Likely benign
(Nov 25, 2019)
germlineclinical testing

PubMed (4)
[See all records that cite these PMIDs]

Citation Link

Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineunknownnot providednot providednot providednot providednot providedclinical testing
not providedgermlinenot provided33not providednot providednot providedclinical testing

Citations

PubMed

A systematic approach to assessing the clinical significance of genetic variants.

Duzkale H, Shen J, McLaughlin H, Alfares A, Kelly MA, Pugh TJ, Funke BH, Rehm HL, Lebo MS.

Clin Genet. 2013 Nov;84(5):453-63. doi: 10.1111/cge.12257.

PubMed [citation]
PMID:
24033266
PMCID:
PMC3995020

Genetic complexity in hypertrophic cardiomyopathy revealed by high-throughput sequencing.

Lopes LR, Zekavati A, Syrris P, Hubank M, Giambartolomei C, Dalageorgou C, Jenkins S, McKenna W; Uk10k Consortium., Plagnol V, Elliott PM.

J Med Genet. 2013 Apr;50(4):228-39. doi: 10.1136/jmedgenet-2012-101270. Epub 2013 Feb 8.

PubMed [citation]
PMID:
23396983
PMCID:
PMC3607113
See all PubMed Citations (5)

Details of each submission

From Laboratory for Molecular Medicine, Partners HealthCare Personalized Medicine, SCV000060968.5

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not provided3not providednot providedclinical testing PubMed (1)

Description

p.Asn182Ser in exon 6 of DSG2: This variant is not expected to have clinical sig nificance due to a lack of conservation across species, including mammals. Of no te, multiple mammals, including cat, dog, rock hyrax, and armadillo, have a seri ne (Ser) at this position despite high nearby amino acid conservation. In additi on, computational prediction tools do not suggest a high likelihood of impact to the protein. This variant has also been identified in 5/9798 African chromosome s by the Exome Aggregation Consortium (ExAC, http://exac.broadinstitute.org; dbS NP rs368512832).

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlinenot providednot providednot providednot provided3not provided3not provided

From Women's Health and Genetics/Laboratory Corporation of America, LabCorp, SCV001361557.1

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testing PubMed (4)

Description

Variant summary: DSG2 c.545A>G (p.Asn182Ser) results in a conservative amino acid change located in the second cadherin repeat (IPR002126) of the encoded protein sequence, which might affect a potential N-glycosylation site (Debus_2019). 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 6.1e-05 in 280730 control chromosomes, predominantly at a frequency of 0.00058 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 20 fold of the estimated maximal expected allele frequency for a pathogenic variant in DSG2 causing Cardiomyopathy phenotype (2.5e-05), strongly suggesting that the variant is a benign polymorphism found primarily in populations of African or African-American origin. The variant, c.545A>G, has been reported in the literature in individuals affected with hypertrophic- or dilated cardiomyopathy, however without strong evidence for causality (Lopes_2013, Pugh_2014, Walsh_2017). In addition, co-occurrence with another pathogenic variant has been reported (TTR c.424G>A, p.Val142Ile; in an internal LCA sample), providing supporting evidence for a benign role. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Five ClinVar submitters have cited the variant as uncertain significance (4x) or likely benign (1x). Based on the evidence outlined above, the variant was classified as likely benign.

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

Last Updated: Sep 23, 2021

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