rs72955212

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_001267550.2(TTN):c.11019C>T(p.Cys3673Cys) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0136 in 1,613,732 control chromosomes in the GnomAD database, including 185 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.010 ( 22 hom., cov: 32)

Exomes 𝑓: 0.014 ( 163 hom. )

Consequence

TTN
NM_001267550.2 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:16

Conservation

PhyloP100: 0.0220

Publications

2 publications found

Variant links:

Genes affected

TTN (HGNC:12403): (titin) This gene encodes a large abundant protein of striated muscle. The product of this gene is divided into two regions, a N-terminal I-band and a C-terminal A-band. The I-band, which is the elastic part of the molecule, contains two regions of tandem immunoglobulin domains on either side of a PEVK region that is rich in proline, glutamate, valine and lysine. The A-band, which is thought to act as a protein-ruler, contains a mixture of immunoglobulin and fibronectin repeats, and possesses kinase activity. An N-terminal Z-disc region and a C-terminal M-line region bind to the Z-line and M-line of the sarcomere, respectively, so that a single titin molecule spans half the length of a sarcomere. Titin also contains binding sites for muscle associated proteins so it serves as an adhesion template for the assembly of contractile machinery in muscle cells. It has also been identified as a structural protein for chromosomes. Alternative splicing of this gene results in multiple transcript variants. Considerable variability exists in the I-band, the M-line and the Z-disc regions of titin. Variability in the I-band region contributes to the differences in elasticity of different titin isoforms and, therefore, to the differences in elasticity of different muscle types. Mutations in this gene are associated with familial hypertrophic cardiomyopathy 9, and autoantibodies to titin are produced in patients with the autoimmune disease scleroderma. [provided by RefSeq, Feb 2012]

TTN links:

TTN-AS1 (HGNC:44124): (TTN antisense RNA 1) This gene encodes a non-coding RNA transcribed from the opposite strand to the titin gene. [provided by RefSeq, Aug 2016]

TTN-AS1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.88).

BP6

Variant 2-178756457-G-A is Benign according to our data. Variant chr2-178756457-G-A is described in ClinVar as [Benign]. Clinvar id is 47850.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=0.022 with no splicing effect.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.0102 (1554/152276) while in subpopulation NFE AF = 0.0156 (1064/68018). AF 95% confidence interval is 0.0149. There are 22 homozygotes in GnomAd4. There are 743 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 22 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TTN	NM_001267550.2 link	c.11019C>T	p.Cys3673Cys	synonymous_variant	Exon 46 of 363	ENST00000589042.5	NP_001254479.2	A0A0A0MTS7
TTN	NM_133379.5 link	c.10303+2527C>T		intron_variant	Intron 44 of 45	ENST00000360870.10	NP_596870.2	Q8WZ42-6Q7Z3B7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TTN	ENST00000589042.5 link	c.11019C>T	p.Cys3673Cys	synonymous_variant	Exon 46 of 363	5	NM_001267550.2	ENSP00000467141.1		A0A0A0MTS7
TTN	ENST00000360870.10 link	c.10303+2527C>T		intron_variant	Intron 44 of 45	5	NM_133379.5	ENSP00000354117.4		Q8WZ42-6

Frequencies

GnomAD3 genomes

AF:

0.0102

AC:

1555

AN:

152158

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00251

Gnomad AMI

AF:

0.00549

Gnomad AMR

AF:

0.00550

Gnomad ASJ

AF:

0.00576

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.0236

Gnomad MID

AF:

0.0285

Gnomad NFE

AF:

0.0156

Gnomad OTH

AF:

0.00765

GnomAD2 exomes

AF:

0.0111

AC:

2750

AN:

248618

AF XY:

0.0108

show subpopulations

Gnomad AFR exome

AF:

0.00245

Gnomad AMR exome

AF:

0.00453

Gnomad ASJ exome

AF:

0.00607

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0243

Gnomad NFE exome

AF:

0.0166

Gnomad OTH exome

AF:

0.0101

GnomAD4 exome

AF:

0.0139

AC:

20321

AN:

1461456

Hom.:

163

Cov.:

AF XY:

0.0135

AC XY:

9808

AN XY:

727030

show subpopulations

African (AFR)

AF:

0.00176

AC:

AN:

33468

American (AMR)

AF:

0.00463

AC:

207

AN:

44702

Ashkenazi Jewish (ASJ)

AF:

0.00650

AC:

170

AN:

26136

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39650

South Asian (SAS)

AF:

0.00124

AC:

107

AN:

86256

European-Finnish (FIN)

AF:

0.0248

AC:

1322

AN:

53328

Middle Eastern (MID)

AF:

0.00711

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.0159

AC:

17712

AN:

1111782

Other (OTH)

AF:

0.0116

AC:

702

AN:

60368

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.481

Heterozygous variant carriers

1214

2428

3642

4856

6070

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0102

AC:

1554

AN:

152276

Hom.:

Cov.:

AF XY:

0.00998

AC XY:

743

AN XY:

74462

show subpopulations

African (AFR)

AF:

0.00250

AC:

104

AN:

41562

American (AMR)

AF:

0.00550

AC:

AN:

15286

Ashkenazi Jewish (ASJ)

AF:

0.00576

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5174

South Asian (SAS)

AF:

0.000414

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.0236

AC:

251

AN:

10618

Middle Eastern (MID)

AF:

0.0272

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0156

AC:

1064

AN:

68018

Other (OTH)

AF:

0.00757

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.501

Heterozygous variant carriers

166

248

331

414

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0137

Hom.:

Bravo

AF:

0.00872

Asia WGS

AF:

0.00115

AC:

AN:

3478

EpiCase

AF:

0.0137

EpiControl

AF:

0.0146

ClinVar

Significance: Benign

Submissions summary: Benign:16

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:7

Apr 09, 2025

Molecular Diagnostic Laboratory for Inherited Cardiovascular Disease, Montreal Heart Institute

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Clinical Genetics, Academic Medical Center

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Oct 12, 2011

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Silent variant: classified as benign based on population frequency of >1% -

Jan 09, 2014

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Apr 25, 2024

Athena Diagnostics

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

- -

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

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

not provided

Benign:4

Nov 07, 2023

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Autosomal recessive limb-girdle muscular dystrophy type 2J

Benign:1

Sep 10, 2021

Genome-Nilou Lab

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Autosomal recessive limb-girdle muscular dystrophy type 2J;C1858763:Dilated cardiomyopathy 1G

Benign:1

Feb 04, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Early-onset myopathy with fatal cardiomyopathy

Benign:1

Sep 10, 2021

Genome-Nilou Lab

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Myopathy, myofibrillar, 9, with early respiratory failure

Benign:1

Sep 10, 2021

Genome-Nilou Lab

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Tibial muscular dystrophy

Benign:1

Sep 10, 2021

Genome-Nilou Lab

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

-0.88

CADD

Benign

0.061

(source)

DANN

Benign

0.72

PhyloP100

0.022

Mutation Taster

=99/1

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

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rs72955212

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over