rs202219343

Variant summary

Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PVS1PM2PP5

The NM_006073.4(TRDN):c.1282C>T(p.Arg428Ter) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000323 in 1,612,400 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.00024 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00033 ( 1 hom. )

Consequence

TRDN
NM_006073.4 stop_gained

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:2U:4

Conservation

PhyloP100: 1.66

Variant links:

Genes affected

TRDN (HGNC:12261): (triadin) This gene encodes an integral membrane protein found in skeletal and cardiac muscle. The encoded protein plays a role in skeletal muscle excitation-contraction coupling as part of the calcium release complex and is required for normal skeletal muscle strength. This protein indirectly links triads and microtubules in skeletal muscle. Mutations in this gene are associated with cardiac arrythmia syndrome and some variants in this gene may be associated with sudden cardiac death. [provided by RefSeq, May 2022]

TRDN links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 11 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 6-123366174-G-A is Pathogenic according to our data. Variant chr6-123366174-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 532333.We mark this variant Likely_pathogenic, oryginal submissions are: {Uncertain_significance=4, Likely_pathogenic=2}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
TRDN	NM_006073.4 linkuse as main transcript	c.1282C>T	p.Arg428Ter	stop_gained	20/41	ENST00000334268.9
TRDN	NM_001251987.2 linkuse as main transcript	c.1285C>T	p.Arg429Ter	stop_gained	20/21
TRDN	NM_001407315.1 linkuse as main transcript	c.1225C>T	p.Arg409Ter	stop_gained	19/20

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TRDN	ENST00000334268.9 linkuse as main transcript	c.1282C>T	p.Arg428Ter	stop_gained	20/41	1	NM_006073.4	A2	Q13061-1
TRDN	ENST00000662930.1 linkuse as main transcript	c.1285C>T	p.Arg429Ter	stop_gained	20/21

Frequencies

GnomAD3 genomes

AF:

0.000237

AC:

AN:

152024

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000242

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:

0.000382

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000129

AC:

AN:

248510

Hom.:

AF XY:

0.000104

AC XY:

AN XY:

134830

show subpopulations

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000275

Gnomad OTH exome

AF:

0.000166

GnomAD4 exome

AF:

0.000331

AC:

484

AN:

1460376

Hom.:

Cov.:

AF XY:

0.000332

AC XY:

241

AN XY:

726472

show subpopulations

Gnomad4 AFR exome

AF:

0.0000598

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000186

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000397

Gnomad4 OTH exome

AF:

0.000414

GnomAD4 genome

AF:

0.000237

AC:

AN:

152024

Hom.:

Cov.:

AF XY:

0.000162

AC XY:

AN XY:

74238

show subpopulations

Gnomad4 AFR

AF:

0.000242

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000382

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000210

Hom.:

Bravo

AF:

0.000253

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.000549

AC:

ESP6500EA

AF:

0.000735

AC:

ExAC

AF:

0.000132

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000437

EpiControl

AF:

0.000178

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:2Uncertain:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Pathogenic:1Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Dec 01, 2023	TRDN: PM2 -
Likely pathogenic, criteria provided, single submitter	clinical testing	AiLife Diagnostics, AiLife Diagnostics	Feb 22, 2022	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Aug 05, 2022	Has not been previously published in association with a TRDN-related disorder to our knowledge; Nonsense variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss-of-function is a not a known mechanism of disease; This variant is associated with the following publications: (PMID: 31589614, 31980526) -

Catecholaminergic polymorphic ventricular tachycardia 5

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Revvity Omics, Revvity

Dec 21, 2022

- -

Catecholaminergic polymorphic ventricular tachycardia 1

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jan 15, 2024

This sequence change creates a premature translational stop signal (p.Arg428*) in the TRDN gene. However, it is currently unclear if variants that occur in this region of the gene cause disease. This variant is present in population databases (rs202219343, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with TRDN-related conditions. ClinVar contains an entry for this variant (Variation ID: 532333). 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. -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 14, 2023

The p.R428* variant (also known as c.1282C>T), located in coding exon 20 of the TRDN gene, results from a C to T substitution at nucleotide position 1282. This changes the amino acid from an arginine to a stop codon within coding exon 20. This variant has been detected in the heterozygous state on exome sequencing in a case with infantile seizures and has also been detected in additional exome sequencing cohorts; however, clinical details were limited (Capalbo A et al. PLoS Genet, 2019 10;15:e1008409; Salfati EL et al. Genome Med, 2019 12;11:83; Hou YC et al. Proc Natl Acad Sci U S A, 2020 02;117:3053-3062; Park J et al. Nat Med, 2021 01;27:66-72). This alteration is expected to result in loss of function by premature protein truncation or nonsense-mediated mRNA decay. However, this alteration does not impact the predominant cardiac isoform of TRDN (NM_001256021.1; Kobayashi YM et al. J. Biol. Chem., 1999 Oct;274:28660-8). Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.41

BayesDel_noAF

Pathogenic

0.57

Cadd

Pathogenic

Dann

Uncertain

1.0

Eigen

Uncertain

0.64

Eigen_PC

Uncertain

0.44

FATHMM_MKL

Benign

0.75

MutationTaster

Benign

1.0

A;A

Vest4

0.76

GERP RS

4.7

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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