chr1-201359637-G-A

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP4_StrongBP6BP7

The NM_001276345.2(TNNT2):c.837C>T(p.Asn279Asn) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000745 in 1,598,172 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). The gene TNNT2 is included in the ClinGen Criteria Specification Registry.

Frequency

Genomes: 𝑓 0.000092 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000073 ( 0 hom. )

Consequence

TNNT2
NM_001276345.2 synonymous

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:12

Conservation

PhyloP100: -1.87

Publications

9 publications found

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 Gene-Disease associations (from GenCC):

dilated cardiomyopathy
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
dilated cardiomyopathy 1D
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
hypertrophic cardiomyopathy 2
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
hypertrophic cardiomyopathy 3
Inheritance: AD Classification: DEFINITIVE Submitted by: G2P
cardiomyopathy, familial restrictive, 3
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
hypertrophic cardiomyopathy
Inheritance: AD Classification: MODERATE Submitted by: ClinGen
familial isolated dilated cardiomyopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
familial isolated restrictive cardiomyopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
left ventricular noncompaction
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
cardiomyopathy
Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics
arrhythmogenic right ventricular cardiomyopathy
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

TNNT2 links:

ENSG00000286600 (HGNC:):

ENSG00000286600 links:

Genome browser will be placed here

ACMG classification

Specifications for TNNT2 are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Classification was made for transcript

Our verdict: Likely_benign. The variant received -6 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.7).

BP6

Variant 1-201359637-G-A is Benign according to our data. Variant chr1-201359637-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 43672.

BP7

Synonymous conserved (PhyloP=-1.87 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001276345.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
TNNT2	NM_001276345.2	MANE Select	c.837C>T	p.Asn279Asn	synonymous	Exon 16 of 17	NP_001263274.1	P45379-1
TNNT2	NM_000364.4		c.828C>T	p.Asn276Asn	synonymous	Exon 15 of 16	NP_000355.2
TNNT2	NM_001406723.1		c.828C>T	p.Asn276Asn	synonymous	Exon 15 of 16	NP_001393652.1	P45379-10

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
TNNT2	ENST00000656932.1	MANE Select	c.837C>T	p.Asn279Asn	synonymous	Exon 16 of 17	ENSP00000499593.1	P45379-1
TNNT2	ENST00000367322.6	TSL:1	c.795C>T	p.Asn265Asn	synonymous	Exon 14 of 15	ENSP00000356291.2	A0A499FJM7
TNNT2	ENST00000367320.6	TSL:1	c.708C>T	p.Asn236Asn	synonymous	Exon 14 of 15	ENSP00000356289.2	P45379-12

Frequencies

GnomAD3 genomes

AF:

0.0000920

AC:

AN:

152160

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.000176

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000886

AC:

AN:

225790

AF XY:

0.0000577

show subpopulations

Gnomad AFR exome

AF:

0.0000725

Gnomad AMR exome

AF:

0.0000305

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000580

Gnomad FIN exome

AF:

0.0000501

Gnomad NFE exome

AF:

0.000131

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000726

AC:

105

AN:

1445894

Hom.:

Cov.:

AF XY:

0.0000739

AC XY:

AN XY:

717576

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33160

American (AMR)

AF:

0.0000232

AC:

AN:

43180

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25838

East Asian (EAS)

AF:

0.0000510

AC:

AN:

39242

South Asian (SAS)

AF:

0.0000597

AC:

AN:

83762

European-Finnish (FIN)

AF:

0.0000191

AC:

AN:

52366

Middle Eastern (MID)

AF:

0.000174

AC:

AN:

5752

European-Non Finnish (NFE)

AF:

0.0000834

AC:

AN:

1102812

Other (OTH)

AF:

0.0000502

AC:

AN:

59782

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.460

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000919

AC:

AN:

152278

Hom.:

Cov.:

AF XY:

0.000134

AC XY:

AN XY:

74450

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41546

American (AMR)

AF:

0.0000653

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5178

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.000176

AC:

AN:

68018

Other (OTH)

AF:

0.00

AC:

AN:

2108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.479

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000106

Hom.:

Bravo

AF:

0.0000907

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (5)

Cardiomyopathy (3)

not provided (2)

Cardiovascular phenotype (1)

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

TNNT2-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.14

BayesDel_noAF

Benign

-0.70

CADD

Benign

1.0

(source)

DANN

Benign

0.73

PhyloP100

-1.9

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over