6-123393666-C-A

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_006073.4(TRDN):c.1063G>T(p.Ala355Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000206 in 1,454,222 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000021 ( 0 hom. )

Consequence

TRDN
NM_006073.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: -0.498

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:

TRDN-AS1 (HGNC:40592): (TRDN antisense RNA 1)

TRDN-AS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.015891671).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TRDN	NM_006073.4 link	c.1063G>T	p.Ala355Ser	missense_variant	Exon 13 of 41	ENST00000334268.9	NP_006064.2	Q13061-1
TRDN	NM_001251987.2 link	c.1066G>T	p.Ala356Ser	missense_variant	Exon 13 of 21		NP_001238916.1	A0A590UJV0Q8IVK2
TRDN	NM_001407315.1 link	c.1006G>T	p.Ala336Ser	missense_variant	Exon 12 of 20		NP_001394244.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
TRDN	ENST00000334268.9 link	c.1063G>T	p.Ala355Ser	missense_variant	Exon 13 of 41	1	NM_006073.4	ENSP00000333984.5	Q13061-1
TRDN	ENST00000662930.1 link	c.1066G>T	p.Ala356Ser	missense_variant	Exon 13 of 21			ENSP00000499585.1	A0A590UJV0
TRDN-AS1	ENST00000587106.6 link	n.55+4191C>A		intron_variant	Intron 1 of 8	5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000673

AC:

AN:

237568

Hom.:

AF XY:

0.0000776

AC XY:

AN XY:

128836

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000480

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000206

AC:

AN:

1454222

Hom.:

Cov.:

AF XY:

0.0000263

AC XY:

AN XY:

722812

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000410

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000253

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000812

Gnomad4 OTH exome

AF:

0.0000333

GnomAD4 genome

Cov.:

Bravo

AF:

0.0000113

ExAC

AF:

0.0000663

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Catecholaminergic polymorphic ventricular tachycardia 1

Uncertain:1

Jul 10, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces alanine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 355 of the TRDN protein (p.Ala355Ser). This variant is present in population databases (rs776657049, gnomAD 0.05%). 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: 660929). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The serine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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

Jan 16, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1063G>T (p.A355S) alteration is located in exon 13 (coding exon 13) of the TRDN gene. This alteration results from a G to T substitution at nucleotide position 1063, causing the alanine (A) at amino acid position 355 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.084

BayesDel_addAF

Benign

-0.48

BayesDel_noAF

Benign

-0.59

CADD

Benign

DANN

Benign

0.86

DEOGEN2

Benign

0.089

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.056

LIST_S2

Benign

0.38

M_CAP

Benign

0.028

MetaRNN

Benign

0.016

MetaSVM

Benign

-1.2

MutationAssessor

Benign

0.34

PrimateAI

Benign

0.26

PROVEAN

Benign

-0.17

REVEL

Benign

0.048

Sift

Benign

0.27

Sift4G

Benign

0.60

Polyphen

0.0080

Vest4

0.15

MutPred

0.20

Gain of phosphorylation at A355 (P = 0.0137);

MVP

0.076

ClinPred

0.030

GERP RS

-5.9

Varity_R

0.056

gMVP

0.011

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

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