3-14134845-G-T

Variant names:

• chr3-14134845-G-T
• rs570836197
• NM_024334.3:c.659G>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_024334.3(TMEM43):​c.659G>T​(p.Arg220Leu) variant causes a missense change. The variant allele was found at a frequency of 0.00000657 in 152,322 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R220H) has been classified as Uncertain significance.

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 33)
• Consequence: TMEM43 NM_024334.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.96
• Publications: 3 publications found

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 Gene-Disease associations (from GenCC):

• arrhythmogenic right ventricular dysplasia 5

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: ClinGen, Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
• autosomal dominant Emery-Dreifuss muscular dystrophy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• auditory neuropathy, autosomal dominant 3

  Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
• Emery-Dreifuss muscular dystrophy 7, autosomal dominant

  Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.11040294).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_024334.3. 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
	TMEM43	NM_024334.3	MANE Select	c.659G>T	p.Arg220Leu	missense	Exon 8 of 12	NP_077310.1	Q9BTV4
	TMEM43	NM_001407274.1		c.662G>T	p.Arg221Leu	missense	Exon 8 of 12	NP_001394203.1
	TMEM43	NM_001407275.1		c.659G>T	p.Arg220Leu	missense	Exon 8 of 12	NP_001394204.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TMEM43	ENST00000306077.5	TSL:1 MANE Select	c.659G>T	p.Arg220Leu	missense	Exon 8 of 12	ENSP00000303992.5	Q9BTV4
	TMEM43	ENST00000949127.1		c.662G>T	p.Arg221Leu	missense	Exon 8 of 12	ENSP00000619186.1
	TMEM43	ENST00000926410.1		c.659G>T	p.Arg220Leu	missense	Exon 8 of 12	ENSP00000596469.1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152204 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251260 AF XY: 0.00000736

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000880

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 32

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152322 Hom.: 0 Cov.: 33 AF XY: 0.0000134 AC XY: 1 AN XY: 74472

African (AFR) AF: 0.00 AC: 0 AN: 41564

American (AMR) AF: 0.00 AC: 0 AN: 15306

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

East Asian (EAS) AF: 0.00 AC: 0 AN: 5178

South Asian (SAS) AF: 0.00 AC: 0 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10614

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68038

Other (OTH) AF: 0.00 AC: 0 AN: 2114

Alfa AF: 0.00 Hom.: 0

ExAC AF: 0.00000824 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.37
BayesDel_addAF	Benign	-0.19	T
BayesDel_noAF	Benign	-0.51
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.0026	T
Eigen	Benign	-0.29
Eigen_PC	Benign	-0.025
FATHMM_MKL	Uncertain	0.77	D
LIST_S2	Benign	0.81	T
M_CAP	Benign	0.010	T
MetaRNN	Benign	0.11	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.69	N
PhyloP100		5.0
PrimateAI	Uncertain	0.50	T
PROVEAN	Benign	1.3	N
REVEL	Benign	0.083
Sift	Benign	0.36	T
Sift4G	Benign	0.26	T
Polyphen		0.052	B
Vest4		0.40
MutPred		0.57		Gain of sheet (P = 0.0085)
MVP		0.46
MPC		0.088
ClinPred		0.36	T
GERP RS		5.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.10
gMVP		0.48
Mutation Taster		=81/19	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs570836197; hg19: chr3-14176345;