11-1934782-G-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS2

The NM_006757.4(TNNT3):c.591-47G>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00166 in 1,606,850 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0017 ( 3 hom. )

Consequence

TNNT3
NM_006757.4 intron

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: 0.225

Publications

0 publications found

Variant links:

Genes affected

TNNT3 (HGNC:11950): (troponin T3, fast skeletal type) The binding of Ca(2+) to the trimeric troponin complex initiates the process of muscle contraction. Increased Ca(2+) concentrations produce a conformational change in the troponin complex that is transmitted to tropomyosin dimers situated along actin filaments. The altered conformation permits increased interaction between a myosin head and an actin filament which, ultimately, produces a muscle contraction. The troponin complex has protein subunits C, I, and T. Subunit C binds Ca(2+) and subunit I binds to actin and inhibits actin-myosin interaction. Subunit T binds the troponin complex to the tropomyosin complex and is also required for Ca(2+)-mediated activation of actomyosin ATPase activity. There are 3 different troponin T genes that encode tissue-specific isoforms of subunit T for fast skeletal-, slow skeletal-, and cardiac-muscle. This gene encodes fast skeletal troponin T protein; also known as troponin T type 3. Alternative splicing results in multiple transcript variants encoding additional distinct troponin T type 3 isoforms. A developmentally regulated switch between fetal/neonatal and adult troponin T type 3 isoforms occurs. Additional splice variants have been described but their biological validity has not been established. Mutations in this gene may cause distal arthrogryposis multiplex congenita type 2B (DA2B). [provided by RefSeq, Oct 2009]

TNNT3 Gene-Disease associations (from GenCC):

distal arthrogryposis type 2B1
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
congenital myopathy
Inheritance: AR Classification: STRONG Submitted by: G2P
arthrogryposis, distal, type 2B2
Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
nemaline myopathy
Inheritance: AR Classification: MODERATE, LIMITED Submitted by: Ambry Genetics, ClinGen
digitotalar dysmorphism
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Sheldon-hall syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

TNNT3 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -16 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.86).

BP6

Variant 11-1934782-G-T is Benign according to our data. Variant chr11-1934782-G-T is described in ClinVar as Likely_benign. ClinVar VariationId is 260028.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS2

High Homozygotes in GnomAdExome4 at 3 AD,AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006757.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
TNNT3	NM_006757.4	MANE Select	c.591-47G>T	intron	N/A	NP_006748.1
TNNT3	NM_001367846.1		c.624-47G>T	intron	N/A	NP_001354775.1
TNNT3	NM_001363561.2		c.600-47G>T	intron	N/A	NP_001350490.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
TNNT3	ENST00000278317.11	TSL:5 MANE Select	c.591-47G>T	intron	N/A	ENSP00000278317.6
TNNT3	ENST00000381589.7	TSL:1	c.585-47G>T	intron	N/A	ENSP00000371001.3
TNNT3	ENST00000381579.7	TSL:1	c.567-47G>T	intron	N/A	ENSP00000370991.3

Frequencies

GnomAD3 genomes

AF:

0.00131

AC:

200

AN:

152226

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000386

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00190

Gnomad ASJ

AF:

0.00202

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.00210

Gnomad OTH

AF:

0.00143

GnomAD2 exomes

AF:

0.00131

AC:

329

AN:

250226

AF XY:

0.00143

show subpopulations

Gnomad AFR exome

AF:

0.000681

Gnomad AMR exome

AF:

0.00147

Gnomad ASJ exome

AF:

0.00319

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000140

Gnomad NFE exome

AF:

0.00198

Gnomad OTH exome

AF:

0.00131

GnomAD4 exome

AF:

0.00169

AC:

2464

AN:

1454506

Hom.:

Cov.:

AF XY:

0.00173

AC XY:

1249

AN XY:

724014

show subpopulations

African (AFR)

AF:

0.000300

AC:

AN:

33352

American (AMR)

AF:

0.00141

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00341

AC:

AN:

26090

East Asian (EAS)

AF:

0.00

AC:

AN:

39668

South Asian (SAS)

AF:

0.00

AC:

AN:

86124

European-Finnish (FIN)

AF:

0.0000960

AC:

AN:

52076

Middle Eastern (MID)

AF:

0.000697

AC:

AN:

5742

European-Non Finnish (NFE)

AF:

0.00199

AC:

2201

AN:

1106590

Other (OTH)

AF:

0.00153

AC:

AN:

60142

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

143

286

430

573

716

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

172

258

344

430

<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:

0.00131

AC:

200

AN:

152344

Hom.:

Cov.:

AF XY:

0.00118

AC XY:

AN XY:

74490

show subpopulations

African (AFR)

AF:

0.000385

AC:

AN:

41580

American (AMR)

AF:

0.00189

AC:

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.00202

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10628

Middle Eastern (MID)

AF:

0.00680

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00210

AC:

143

AN:

68028

Other (OTH)

AF:

0.00142

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.496

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:

0.00211

Hom.:

Bravo

AF:

0.00139

ClinVar

ClinVar submissions as Germline

Significance:Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.86

CADD

Benign

2.0

(source)

DANN

Benign

0.73

PhyloP100

0.23

Mutation Taster

=100/0

polymorphism

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

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