NM_006073.4:c.274G>C

Variant names:

• chr6-123548571-C-G
• rs34808221
• NM_006073.4:c.274G>C

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_006073.4(TRDN):​c.274G>C​(p.Val92Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000712 in 1,404,664 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 nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V92I) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 7.1e-7 (0 hom.)
• Consequence: TRDN NM_006073.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.19
• Publications: 0 publications found

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: AR, AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
• catecholaminergic polymorphic ventricular tachycardia 5

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
• familial long QT syndrome

  Inheritance: AR Classification: STRONG Submitted by: G2P
• long QT syndrome

  Inheritance: AR Classification: STRONG Submitted by: ClinGen

ENSG00000285691 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2873801).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006073.4. 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
	TRDN	NM_006073.4	MANE Select	c.274G>C	p.Val92Leu	missense	Exon 3 of 41	NP_006064.2	Q13061-1
	TRDN	NM_001251987.2		c.274G>C	p.Val92Leu	missense	Exon 3 of 21	NP_001238916.1	A0A590UJV0
	TRDN	NM_001407315.1		c.274G>C	p.Val92Leu	missense	Exon 3 of 20	NP_001394244.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TRDN	ENST00000334268.9	TSL:1 MANE Select	c.274G>C	p.Val92Leu	missense	Exon 3 of 41	ENSP00000333984.5	Q13061-1
	TRDN	ENST00000628709.2	TSL:1	c.274G>C	p.Val92Leu	missense	Exon 3 of 9	ENSP00000486095.1	Q13061-2
	TRDN	ENST00000546248.6	TSL:1	c.274G>C	p.Val92Leu	missense	Exon 3 of 8	ENSP00000439281.2	H9ME53

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 7.12e-7 AC: 1 AN: 1404664 Hom.: 0 Cov.: 35 AF XY: 0.00000144 AC XY: 1 AN XY: 695140

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 31776

American (AMR) AF: 0.00 AC: 0 AN: 37332

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 24890

East Asian (EAS) AF: 0.00 AC: 0 AN: 37502

South Asian (SAS) AF: 0.00 AC: 0 AN: 76818

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50854

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5632

European-Non Finnish (NFE) AF: 9.24e-7 AC: 1 AN: 1081856

Other (OTH) AF: 0.00 AC: 0 AN: 58004

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.42
BayesDel_addAF	Uncertain	0.036	T
BayesDel_noAF	Benign	-0.19
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.25	T
Eigen	Uncertain	0.35
Eigen_PC	Uncertain	0.36
FATHMM_MKL	Uncertain	0.83	D
LIST_S2	Benign	0.84	T
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.29	T
MetaSVM	Benign	-0.75	T
MutationAssessor	Uncertain	2.4	M
PhyloP100		2.2
PrimateAI	Uncertain	0.62	T
PROVEAN	Benign	-1.2	N
REVEL	Benign	0.14
Sift	Uncertain	0.0080	D
Sift4G	Benign	0.098	T
Polyphen		0.95	P
Vest4		0.52
MutPred		0.68		Loss of ubiquitination at K90 (P = 0.1264)
MVP		0.34
ClinPred		0.92	D
GERP RS		4.4
Varity_R		0.15
gMVP		0.25
Mutation Taster		=87/13	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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: rs34808221; hg19: chr6-123869716;