3-14132577-G-A

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 1P and 7B. PP3BP4_ModerateBP6BS2

The NM_024334.3(TMEM43):c.424G>A(p.Glu142Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00105 in 1,614,138 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 Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00068 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0011 ( 0 hom. )

Consequence

TMEM43
NM_024334.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:13

Conservation

PhyloP100: 8.23

Variant links:

Genes affected

TMEM43 (HGNC:28472): (transmembrane protein 43) This gene belongs to the TMEM43 family. Defects in this gene are the cause of familial arrhythmogenic right ventricular dysplasia type 5 (ARVD5), also known as arrhythmogenic right ventricular cardiomyopathy type 5 (ARVC5). Arrhythmogenic right ventricular dysplasia is an inherited disorder, often involving both ventricles, and is characterized by ventricular tachycardia, heart failure, sudden cardiac death, and fibrofatty replacement of cardiomyocytes. This gene contains a response element for PPAR gamma (an adipogenic transcription factor), which may explain the fibrofatty replacement of the myocardium, a characteristic pathological finding in ARVC. [provided by RefSeq, Oct 2008]

TMEM43 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

PP3

Multiple lines of computational evidence support a deleterious effect 7: AlphaMissense, BayesDel_noAF, Cadd, Dann, FATHMM_MKL, MutationAssessor, phyloP100way_vertebrate [when BayesDel_addAF, max_spliceai, M_CAP, MetaRNN, MutationTaster was below the threshold]

BP4

Computational evidence support a benign effect (MetaRNN=0.15352347).

BP6

Variant 3-14132577-G-A is Benign according to our data. Variant chr3-14132577-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 46147.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=2, Likely_benign=7}. Variant chr3-14132577-G-A is described in Lovd as [Benign]. Variant chr3-14132577-G-A is described in Lovd as [Likely_benign].

BS2

High AC in GnomAd4 at 104 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TMEM43	NM_024334.3 link	c.424G>A	p.Glu142Lys	missense_variant	Exon 5 of 12	ENST00000306077.5	NP_077310.1	Q9BTV4A0A024R2F9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
TMEM43	ENST00000306077.5 link	c.424G>A	p.Glu142Lys	missense_variant	Exon 5 of 12	1	NM_024334.3	ENSP00000303992.5	Q9BTV4
TMEM43	ENST00000432444.2 link	n.*454G>A		non_coding_transcript_exon_variant	Exon 6 of 13	3		ENSP00000395617.1	F8WDL3
TMEM43	ENST00000432444.2 link	n.*454G>A		3_prime_UTR_variant	Exon 6 of 13	3		ENSP00000395617.1	F8WDL3

Frequencies

GnomAD3 genomes

AF:

0.000683

AC:

104

AN:

152172

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000327

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000283

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00126

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000545

AC:

137

AN:

251372

Hom.:

AF XY:

0.000567

AC XY:

AN XY:

135880

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.000405

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000231

Gnomad NFE exome

AF:

0.000994

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.00109

AC:

1593

AN:

1461848

Hom.:

Cov.:

AF XY:

0.00106

AC XY:

769

AN XY:

727228

show subpopulations

Gnomad4 AFR exome

AF:

0.000239

Gnomad4 AMR exome

AF:

0.000358

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.000169

Gnomad4 NFE exome

AF:

0.00134

Gnomad4 OTH exome

AF:

0.00124

GnomAD4 genome

AF:

0.000683

AC:

104

AN:

152290

Hom.:

Cov.:

AF XY:

0.000591

AC XY:

AN XY:

74466

show subpopulations

Gnomad4 AFR

AF:

0.000241

Gnomad4 AMR

AF:

0.000327

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000283

Gnomad4 NFE

AF:

0.00126

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000757

Hom.:

Bravo

AF:

0.000635

TwinsUK

AF:

0.00189

AC:

ALSPAC

AF:

0.00104

AC:

ESP6500AA

AF:

0.000908

AC:

ESP6500EA

AF:

0.00151

AC:

ExAC

AF:

0.000486

AC:

EpiCase

AF:

0.00120

EpiControl

AF:

0.000711

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:13

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:8

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Clinical Genetics, Academic Medical Center

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Jul 21, 2021

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 27153395, 23812740, 23161701, 24598986, 23861362, 30276209, 30847666, 31402444) -

Sep 07, 2023

Revvity Omics, Revvity

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jun 24, 2013

Biesecker Lab/Clinical Genomics Section, National Institutes of Health

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: research

- -

Oct 01, 2024

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

TMEM43: BS1 -

not specified

Uncertain:1Benign:1

Apr 10, 2015

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant classified as Uncertain Significance - Favor Benign. The p.Glu142Lys var iant in TMEM43 has been previously reported in 3 individuals with ARVC/D (Baskin 2013, Haywood 2013) and was identified by our laboratory in 1 Caucasian child w ith congenital DCM. In addition, this variant has been identified in 0.1% (49/66 614) of European chromosomes by the Exome Aggregation Consortium (ExAC, http://e xac.broadinstitute.org; dbSNP rs145619906) and was also identified in 1 homozygo us reportedly healthy control individual (Haywood 2013). Computational predictio n tools and conservation analysis suggest that this variant may impact the prote in, though this information is not predictive enough to determine pathogenicity. In summary, while the clinical significance of the p.Glu142Lys variant is uncer tain, the frequency of this variant and its presence in an unaffected homozygous control individual suggests that it is more likely to be benign. -

Nov 15, 2023

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

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: TMEM43 c.424G>A (p.Glu142Lys) results in a conservative amino acid change in the encoded protein sequence. Three of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 0.00055 in 251372 control chromosomes, predominantly at a frequency of 0.00099 within the Non-Finnish European subpopulation in the gnomAD database. The observed variant frequency within Non-Finnish European control individuals in the gnomAD database is approximately 119-fold of the estimated maximal expected allele frequency for a pathogenic variant in TMEM43 causing Arrhythmogenic Right Ventricular Dysplasia/Cardiomyopathy phenotype (8.3e-06), strongly suggesting that the variant is a benign polymorphism found primarily in populations of Non-Finnish European origin. c.424G>A has been reported in the literature in individuals affected with Arrhythmogenic Right Ventricular Dysplasia/Cardiomyopathy, without strong evidence for causality (e.g. Haywood_2013, Baskin_2013, Donate Puertas_2018, Begay_2016, van Lint_2019) and has also been reported in the homozygous state in an unaffected control individual (Haywood_2013). These reports do not provide unequivocal conclusions about association of the variant with Arrhythmogenic Right Ventricular Dysplasia/Cardiomyopathy. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publications have been ascertained in the context of this evaluation (PMID: 23812740, 28008423, 30276209, 23161701, 30847666). Six submitters have cited clinical-significance assessments for this variant to ClinVar after 2014. Four submitters classified the variant as likely benign and two classified it as VUS. Based on the evidence outlined above, the variant was classified as likely benign. -

Cardiomyopathy

Benign:1

Nov 05, 2019

Color Diagnostics, LLC DBA Color Health

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

TMEM43-related disorder

Benign:1

Jan 27, 2023

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Cardiovascular phenotype

Benign:1

May 25, 2023

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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. -

Arrhythmogenic right ventricular dysplasia 5

Benign:1

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.59

BayesDel_addAF

Benign

-0.030

BayesDel_noAF

Pathogenic

0.18

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.074

Eigen

Uncertain

0.59

Eigen_PC

Uncertain

0.57

FATHMM_MKL

Uncertain

0.97

LIST_S2

Uncertain

0.95

M_CAP

Benign

0.029

MetaRNN

Benign

0.15

MetaSVM

Benign

-0.91

MutationAssessor

Pathogenic

3.2

PrimateAI

Uncertain

0.63

PROVEAN

Uncertain

-2.6

REVEL

Uncertain

0.33

Sift

Uncertain

0.015

Sift4G

Uncertain

0.032

Polyphen

1.0

Vest4

0.84

MVP

0.55

MPC

0.43

ClinPred

0.20

GERP RS

4.3

Varity_R

0.49

gMVP

0.71

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over