rs192248377

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBP6BS2

The NM_003283.6(TNNT1):c.751-5C>T variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000474 in 1,613,166 control chromosomes in the GnomAD database, including 6 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00088 ( 1 hom., cov: 30)

Exomes 𝑓: 0.00043 ( 5 hom. )

Consequence

TNNT1
NM_003283.6 splice_region, intron

Scores

Splicing: ADA: 0.00003421

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:3

Conservation

PhyloP100: 0.0460

Publications

0 publications found

Variant links:

Genes affected

TNNT1 (HGNC:11948): (troponin T1, slow skeletal type) This gene encodes a protein that is a subunit of troponin, which is a regulatory complex located on the thin filament of the sarcomere. This complex regulates striated muscle contraction in response to fluctuations in intracellular calcium concentration. This complex is composed of three subunits: troponin C, which binds calcium, troponin T, which binds tropomyosin, and troponin I, which is an inhibitory subunit. This protein is the slow skeletal troponin T subunit. Mutations in this gene cause nemaline myopathy type 5, also known as Amish nemaline myopathy, a neuromuscular disorder characterized by muscle weakness and rod-shaped, or nemaline, inclusions in skeletal muscle fibers which affects infants, resulting in death due to respiratory insufficiency, usually in the second year. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

TNNT1 Gene-Disease associations (from GenCC):

nemaline myopathy 5
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, ClinGen, Labcorp Genetics (formerly Invitae), Ambry Genetics
nemaline myopathy 5B, autosomal recessive, childhood-onset
Inheritance: AR Classification: STRONG Submitted by: PanelApp Australia
nemaline myopathy
Inheritance: AD Classification: LIMITED Submitted by: PanelApp Australia, ClinGen
nemaline myopathy 5C, autosomal dominant
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)

TNNT1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.84).

BP6

Variant 19-55133932-G-A is Benign according to our data. Variant chr19-55133932-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 259035.

BS2

High Homozygotes in GnomAdExome4 at 5 AR,AD gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003283.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
TNNT1	NM_003283.6	MANE Select	c.751-5C>T	splice_region intron	N/A	NP_003274.3
TNNT1	NM_001126132.3		c.703-5C>T	splice_region intron	N/A	NP_001119604.1	P13805-3
TNNT1	NM_001126133.3		c.670-5C>T	splice_region intron	N/A	NP_001119605.1	P13805-2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
TNNT1	ENST00000588981.6	TSL:1 MANE Select	c.751-5C>T	splice_region intron	N/A	ENSP00000467176.1	P13805-1
TNNT1	ENST00000291901.12	TSL:1	c.703-5C>T	splice_region intron	N/A	ENSP00000291901.8	P13805-3
TNNT1	ENST00000356783.9	TSL:1	c.670-5C>T	splice_region intron	N/A	ENSP00000349233.4	P13805-2

Frequencies

GnomAD3 genomes

AF:

0.000877

AC:

133

AN:

151590

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00217

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000197

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00703

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.000957

GnomAD2 exomes

AF:

0.000926

AC:

232

AN:

250518

AF XY:

0.00120

show subpopulations

Gnomad AFR exome

AF:

0.00259

Gnomad AMR exome

AF:

0.000145

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000354

Gnomad OTH exome

AF:

0.000491

GnomAD4 exome

AF:

0.000432

AC:

632

AN:

1461460

Hom.:

Cov.:

AF XY:

0.000607

AC XY:

441

AN XY:

727012

show subpopulations

African (AFR)

AF:

0.00269

AC:

AN:

33480

American (AMR)

AF:

0.000134

AC:

AN:

44718

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39700

South Asian (SAS)

AF:

0.00559

AC:

482

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53006

Middle Eastern (MID)

AF:

0.000520

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000180

AC:

AN:

1112004

Other (OTH)

AF:

0.000497

AC:

AN:

60390

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.474

Heterozygous variant carriers

103

155

206

258

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

100

<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:

0.000877

AC:

133

AN:

151706

Hom.:

Cov.:

AF XY:

0.000944

AC XY:

AN XY:

74178

show subpopulations

African (AFR)

AF:

0.00217

AC:

AN:

41060

American (AMR)

AF:

0.000197

AC:

AN:

15248

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5154

South Asian (SAS)

AF:

0.00683

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10614

Middle Eastern (MID)

AF:

0.0102

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000441

AC:

AN:

68008

Other (OTH)

AF:

0.000947

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.494

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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:

0.000164

Hom.:

Bravo

AF:

0.000635

Asia WGS

AF:

0.00375

AC:

AN:

3478

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Nemaline myopathy 5 (2)

not provided (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.84

CADD

Benign

4.5

(source)

DANN

Benign

0.75

PhyloP100

0.046

Mutation Taster

=99/1

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.000034

dbscSNV1_RF

Benign

0.0

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

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