6-123267707-C-T

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PP3_Strong

The NM_006073.4(TRDN):c.1783G>A(p.Asp595Asn) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000268 in 1,565,760 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000027 ( 0 hom. )

Consequence

TRDN
NM_006073.4 missense, splice_region

Scores

Splicing: ADA: 1.000

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 3.54

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

catecholaminergic polymorphic ventricular tachycardia
Inheritance: AD, AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
catecholaminergic polymorphic ventricular tachycardia 5
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Genomics England PanelApp
familial long QT syndrome
Inheritance: AR Classification: STRONG Submitted by: G2P
long QT syndrome
Inheritance: AR Classification: STRONG Submitted by: ClinGen

TRDN links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PP3

Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TRDN	NM_006073.4 link	c.1783G>A	p.Asp595Asn	missense_variant, splice_region_variant	Exon 32 of 41	ENST00000334268.9	NP_006064.2	Q13061-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TRDN	ENST00000334268.9 link	c.1783G>A	p.Asp595Asn	missense_variant, splice_region_variant	Exon 32 of 41	1	NM_006073.4	ENSP00000333984.5		Q13061-1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

151844

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000657

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:

0.0000294

Gnomad OTH

AF:

0.000479

GnomAD2 exomes

AF:

0.0000201

AC:

AN:

198842

AF XY:

0.0000187

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000363

Gnomad ASJ exome

AF:

0.000116

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000227

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000269

AC:

AN:

1413916

Hom.:

Cov.:

AF XY:

0.0000314

AC XY:

AN XY:

700916

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

31400

American (AMR)

AF:

0.0000517

AC:

AN:

38678

Ashkenazi Jewish (ASJ)

AF:

0.0000402

AC:

AN:

24892

East Asian (EAS)

AF:

0.00

AC:

AN:

37926

South Asian (SAS)

AF:

0.00

AC:

AN:

78252

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5562

European-Non Finnish (NFE)

AF:

0.0000304

AC:

AN:

1087296

Other (OTH)

AF:

0.0000343

AC:

AN:

58292

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.470

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000263

AC:

AN:

151844

Hom.:

Cov.:

AF XY:

0.0000270

AC XY:

AN XY:

74152

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41340

American (AMR)

AF:

0.0000657

AC:

AN:

15226

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.00

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10576

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

67922

Other (OTH)

AF:

0.000479

AC:

AN:

2086

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.550

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000676

Hom.:

Bravo

AF:

0.0000113

ExAC

AF:

0.00000832

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Catecholaminergic polymorphic ventricular tachycardia 1;C3809536:Catecholaminergic polymorphic ventricular tachycardia 5

Uncertain:1

Sep 10, 2021

Fulgent Genetics, Fulgent Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Catecholaminergic polymorphic ventricular tachycardia 1

Uncertain:1

Apr 25, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces aspartic acid, which is acidic and polar, with asparagine, which is neutral and polar, at codon 595 of the TRDN protein (p.Asp595Asn). This variant also falls at the last nucleotide of exon 32, which is part of the consensus splice site for this exon. This variant is present in population databases (rs771170294, gnomAD 0.01%). 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: 532385). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. 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

Dec 13, 2023

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.1783G>A variant (also known as p.D595N), located in coding exon 32 of the TRDN gene, results from a G to A substitution at nucleotide position 1783. The amino acid change results in aspartic acid to asparagine at codon 595, an amino acid with highly similar properties. However, this change occurs in the last base pair of coding exon 32, which makes it likely to have some effect on normal mRNA splicing. This nucleotide position is highly conserved in available vertebrate species. This amino acid position is well conserved in available vertebrate species. In silico splice site analysis predicts that this alteration will weaken the native splice donor site. In addition, as a missense substitution, this is predicted to be tolerated by in silico analysis. 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

AlphaMissense

Benign

0.097

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.62

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.11

Eigen

Benign

0.14

Eigen_PC

Benign

0.16

FATHMM_MKL

Uncertain

0.83

LIST_S2

Benign

0.62

M_CAP

Benign

0.012

MetaRNN

Benign

0.21

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.90

PhyloP100

3.5

PrimateAI

Benign

0.41

PROVEAN

Benign

0.070

REVEL

Benign

0.11

Sift

Uncertain

0.0040

Sift4G

Benign

0.16

Polyphen

0.91

Vest4

0.15

MutPred

0.40

Loss of ubiquitination at K593 (P = 0.044);

MVP

0.26

ClinPred

0.40

GERP RS

4.1

Varity_R

0.10

gMVP

0.027

Mutation Taster

=54/46

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

1.0

SpliceAI score (max)

0.70

Details are displayed if max score is > 0.2

DS_DL_spliceai

0.70

Position offset: 0

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

Publications

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6-123267707-C-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over