NM_001276345.2:c.237G>A

Variant names:

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BA1

The NM_001276345.2(TNNT2):c.237G>A(p.Ser79Ser) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0663 in 1,613,624 control chromosomes in the GnomAD database, including 4,202 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. S79S) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.087 ( 730 hom., cov: 32)

Exomes 𝑓: 0.064 ( 3472 hom. )

Consequence

TNNT2
NM_001276345.2 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:20

Conservation

PhyloP100: -3.67

Variant links:

Genes affected

TNNT2 (HGNC:11949): (troponin T2, cardiac type) This gene encodes the cardiac isoform of troponin T. The encoded protein is the tropomyosin-binding subunit of the troponin complex, which is located on the thin filament of striated muscles and regulates muscle contraction in response to alterations in intracellular calcium ion concentration. Mutations in this gene have been associated with familial hypertrophic cardiomyopathy as well as with dilated cardiomyopathy. [provided by RefSeq, May 2022]

TNNT2 links:

ENSG00000286600 (HGNC:):

ENSG00000286600 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.54).

BP6

Variant 1-201365667-C-T is Benign according to our data. Variant chr1-201365667-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 43617.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-201365667-C-T is described in Lovd as [Benign].

BP7

Synonymous conserved (PhyloP=-3.67 with no splicing effect.

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.153 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TNNT2	NM_001276345.2 link	c.237G>A	p.Ser79Ser	synonymous_variant	Exon 9 of 17	ENST00000656932.1	NP_001263274.1	P45379-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TNNT2	ENST00000656932.1 link	c.237G>A	p.Ser79Ser	synonymous_variant	Exon 9 of 17		NM_001276345.2	ENSP00000499593.1		P45379-1

Frequencies

GnomAD3 genomes

AF:

0.0870

AC:

13235

AN:

152088

Hom.:

730

Cov.:

show subpopulations

Gnomad AFR

AF:

0.156

Gnomad AMI

AF:

0.0811

Gnomad AMR

AF:

0.0582

Gnomad ASJ

AF:

0.0571

Gnomad EAS

AF:

0.000577

Gnomad SAS

AF:

0.0558

Gnomad FIN

AF:

0.0662

Gnomad MID

AF:

0.0791

Gnomad NFE

AF:

0.0651

Gnomad OTH

AF:

0.0917

GnomAD3 exomes

AF:

0.0606

AC:

15184

AN:

250472

Hom.:

607

AF XY:

0.0600

AC XY:

8124

AN XY:

135340

show subpopulations

Gnomad AFR exome

AF:

0.155

Gnomad AMR exome

AF:

0.0378

Gnomad ASJ exome

AF:

0.0611

Gnomad EAS exome

AF:

0.000163

Gnomad SAS exome

AF:

0.0636

Gnomad FIN exome

AF:

0.0673

Gnomad NFE exome

AF:

0.0622

Gnomad OTH exome

AF:

0.0557

GnomAD4 exome

AF:

0.0642

AC:

93785

AN:

1461416

Hom.:

3472

Cov.:

AF XY:

0.0641

AC XY:

46576

AN XY:

726952

show subpopulations

Gnomad4 AFR exome

AF:

0.161

Gnomad4 AMR exome

AF:

0.0387

Gnomad4 ASJ exome

AF:

0.0600

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0636

Gnomad4 FIN exome

AF:

0.0616

Gnomad4 NFE exome

AF:

0.0647

Gnomad4 OTH exome

AF:

0.0650

GnomAD4 genome

AF:

0.0870

AC:

13236

AN:

152208

Hom.:

730

Cov.:

AF XY:

0.0852

AC XY:

6338

AN XY:

74418

show subpopulations

Gnomad4 AFR

AF:

0.156

Gnomad4 AMR

AF:

0.0581

Gnomad4 ASJ

AF:

0.0571

Gnomad4 EAS

AF:

0.000578

Gnomad4 SAS

AF:

0.0558

Gnomad4 FIN

AF:

0.0662

Gnomad4 NFE

AF:

0.0651

Gnomad4 OTH

AF:

0.0903

Alfa

AF:

0.0651

Hom.:

514

Bravo

AF:

0.0892

Asia WGS

AF:

0.0300

AC:

107

AN:

3478

EpiCase

AF:

0.0674

EpiControl

AF:

0.0704

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:20

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:7

Aug 29, 2017

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Apr 08, 2025

Molecular Diagnostic Laboratory for Inherited Cardiovascular Disease, Montreal Heart Institute

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Clinical Genetics, Academic Medical Center

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

PreventionGenetics, part of Exact Sciences

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Benign:2

Mar 03, 2015

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Hypertrophic cardiomyopathy

Benign:2

Jun 14, 2016

Illumina Laboratory Services, Illumina

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Sep 27, 2022

Cohesion Phenomics

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Dilated cardiomyopathy 1D

Benign:1

Apr 11, 2023

Genome-Nilou Lab

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Cardiomyopathy

Benign:1

Mar 15, 2018

Color Diagnostics, LLC DBA Color Health

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dilated Cardiomyopathy, Dominant

Benign:1

Jun 14, 2016

Illumina Laboratory Services, Illumina

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Cardiomyopathy, familial restrictive, 3

Benign:1

Apr 11, 2023

Genome-Nilou Lab

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Left ventricular noncompaction cardiomyopathy

Benign:1

Jun 14, 2016

Illumina Laboratory Services, Illumina

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Familial restrictive cardiomyopathy

Benign:1

Jun 14, 2016

Illumina Laboratory Services, Illumina

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hypertrophic cardiomyopathy 2

Benign:1

Apr 11, 2023

Genome-Nilou Lab

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Cardiovascular phenotype

Benign:1

Jun 15, 2015

Ambry Genetics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Dilated cardiomyopathy 1D;C1861864:Hypertrophic cardiomyopathy 2;C2676271:Cardiomyopathy, familial restrictive, 3

Benign:1

Feb 04, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.54

CADD

Benign

1.6

DANN

Benign

0.76

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

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