rs534339525

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_StrongBP6

The NM_001267550.2(TTN):c.34294C>T(p.Pro11432Ser) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000104 in 1,168,778 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 10/12 in silico tools predict a benign outcome for this variant. 1/1 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 0.00041 ( 1 hom., cov: 26)

Exomes 𝑓: 0.000065 ( 0 hom. )

Consequence

TTN
NM_001267550.2 missense, splice_region

Scores

Clinical Significance

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

Conservation

PhyloP100: 1.42

Publications

1 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:

LOC124906100 (HGNC:):

LOC124906100 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.05460459).

BP6

Variant 2-178677285-G-A is Benign according to our data. Variant chr2-178677285-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 238747.We mark this variant Likely_benign, oryginal submission is: [Conflicting_classifications_of_pathogenicity].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TTN	NM_001267550.2 link	c.34294C>T	p.Pro11432Ser	missense_variant, splice_region_variant	Exon 147 of 363	ENST00000589042.5	NP_001254479.2	A0A0A0MTS7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TTN	ENST00000589042.5 link	c.34294C>T	p.Pro11432Ser	missense_variant, splice_region_variant	Exon 147 of 363	5	NM_001267550.2	ENSP00000467141.1		A0A0A0MTS7

Frequencies

GnomAD3 genomes

AF:

0.000414

AC:

AN:

135374

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00119

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000553

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00714

Gnomad NFE

AF:

0.0000611

Gnomad OTH

AF:

0.00107

GnomAD4 exome

AF:

0.0000648

AC:

AN:

1033330

Hom.:

Cov.:

AF XY:

0.0000596

AC XY:

AN XY:

486812

show subpopulations

African (AFR)

AF:

0.000432

AC:

AN:

20830

American (AMR)

AF:

0.000146

AC:

AN:

6830

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

12714

East Asian (EAS)

AF:

0.00

AC:

AN:

20892

South Asian (SAS)

AF:

0.00

AC:

AN:

18898

European-Finnish (FIN)

AF:

0.00

AC:

AN:

17530

Middle Eastern (MID)

AF:

0.00151

AC:

AN:

2654

European-Non Finnish (NFE)

AF:

0.0000515

AC:

AN:

892736

Other (OTH)

AF:

0.000174

AC:

AN:

40246

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.476

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:

0.000406

AC:

AN:

135448

Hom.:

Cov.:

AF XY:

0.000430

AC XY:

AN XY:

65140

show subpopulations

African (AFR)

AF:

0.00119

AC:

AN:

34508

American (AMR)

AF:

0.000553

AC:

AN:

12668

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3368

East Asian (EAS)

AF:

0.00

AC:

AN:

4318

South Asian (SAS)

AF:

0.00

AC:

AN:

4042

European-Finnish (FIN)

AF:

0.00

AC:

AN:

8034

Middle Eastern (MID)

AF:

0.00385

AC:

AN:

260

European-Non Finnish (NFE)

AF:

0.0000611

AC:

AN:

65492

Other (OTH)

AF:

0.00106

AC:

AN:

1890

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.569

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:

0.0000843

Hom.:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

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

Uncertain:1

May 16, 2017

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Autosomal recessive limb-girdle muscular dystrophy type 2J;C1838244:Tibial muscular dystrophy;C1858763:Dilated cardiomyopathy 1G;C1861065:Hypertrophic cardiomyopathy 9;C1863599:Myopathy, myofibrillar, 9, with early respiratory failure;C2673677:Early-onset myopathy with fatal cardiomyopathy

Uncertain:1

Oct 01, 2021

Fulgent Genetics, Fulgent Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Uncertain:1

Mar 23, 2018

Athena Diagnostics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not specified

Benign:1

Apr 09, 2025

Molecular Diagnostic Laboratory for Inherited Cardiovascular Disease, Montreal Heart Institute

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.42

BayesDel_noAF

Benign

-0.48

CADD

Benign

(source)

DANN

Benign

0.63

FATHMM_MKL

Uncertain

0.84

LIST_S2

Benign

0.53

M_CAP

Benign

0.028

MetaRNN

Benign

0.055

PhyloP100

1.4

Vest4

0.14

MVP

0.68

GERP RS

1.7

Mutation Taster

=83/17

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.10

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over