15-63059641-C-A

Variant names:

Variant summary

Our verdict is Benign. Variant got -19 ACMG points: 0P and 19B. BP4_ModerateBP6_Very_StrongBP7BA1

The NM_001018005.2(TPM1):c.453C>A(p.Ala151Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.664 in 1,610,730 control chromosomes in the GnomAD database, including 357,799 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.65 ( 32801 hom., cov: 31)

Exomes 𝑓: 0.66 ( 324998 hom. )

Consequence

TPM1
NM_001018005.2 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:20O:1

Conservation

PhyloP100: 3.42

Variant links:

Genes affected

TPM1 (HGNC:12010): (tropomyosin 1) This gene is a member of the tropomyosin family of highly conserved, widely distributed actin-binding proteins involved in the contractile system of striated and smooth muscles and the cytoskeleton of non-muscle cells. Tropomyosin is composed of two alpha-helical chains arranged as a coiled-coil. It is polymerized end to end along the two grooves of actin filaments and provides stability to the filaments. The encoded protein is one type of alpha helical chain that forms the predominant tropomyosin of striated muscle, where it also functions in association with the troponin complex to regulate the calcium-dependent interaction of actin and myosin during muscle contraction. In smooth muscle and non-muscle cells, alternatively spliced transcript variants encoding a range of isoforms have been described. Mutations in this gene are associated with type 3 familial hypertrophic cardiomyopathy and dilated cardiomyopathy 1Y. [provided by RefSeq, Jun 2022]

TPM1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -19 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.28).

BP6

Variant 15-63059641-C-A is Benign according to our data. Variant chr15-63059641-C-A is described in ClinVar as [Benign]. Clinvar id is 31888.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr15-63059641-C-A is described in Lovd as [Benign]. Variant chr15-63059641-C-A is described in Lovd as [Likely_benign].

BP7

Synonymous conserved (PhyloP=3.41 with no splicing effect.

BA1

GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.927 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TPM1	NM_001018005.2 link	c.453C>A	p.Ala151Ala	synonymous_variant	Exon 4 of 10	ENST00000403994.9	NP_001018005.1	P09493-1D9YZV4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TPM1	ENST00000403994.9 link	c.453C>A	p.Ala151Ala	synonymous_variant	Exon 4 of 10	1	NM_001018005.2	ENSP00000385107.4		P09493-1

Frequencies

GnomAD3 genomes

AF:

0.652

AC:

99022

AN:

151884

Hom.:

32785

Cov.:

show subpopulations

Gnomad AFR

AF:

0.613

Gnomad AMI

AF:

0.741

Gnomad AMR

AF:

0.577

Gnomad ASJ

AF:

0.653

Gnomad EAS

AF:

0.949

Gnomad SAS

AF:

0.724

Gnomad FIN

AF:

0.698

Gnomad MID

AF:

0.608

Gnomad NFE

AF:

0.657

Gnomad OTH

AF:

0.636

GnomAD3 exomes

AF:

0.670

AC:

168498

AN:

251338

Hom.:

57700

AF XY:

0.674

AC XY:

91516

AN XY:

135852

show subpopulations

Gnomad AFR exome

AF:

0.614

Gnomad AMR exome

AF:

0.555

Gnomad ASJ exome

AF:

0.660

Gnomad EAS exome

AF:

0.958

Gnomad SAS exome

AF:

0.704

Gnomad FIN exome

AF:

0.703

Gnomad NFE exome

AF:

0.652

Gnomad OTH exome

AF:

0.674

GnomAD4 exome

AF:

0.665

AC:

969963

AN:

1458728

Hom.:

324998

Cov.:

AF XY:

0.666

AC XY:

483250

AN XY:

725788

show subpopulations

Gnomad4 AFR exome

AF:

0.616

Gnomad4 AMR exome

AF:

0.563

Gnomad4 ASJ exome

AF:

0.665

Gnomad4 EAS exome

AF:

0.952

Gnomad4 SAS exome

AF:

0.702

Gnomad4 FIN exome

AF:

0.698

Gnomad4 NFE exome

AF:

0.656

Gnomad4 OTH exome

AF:

0.674

GnomAD4 genome

AF:

0.652

AC:

99072

AN:

152002

Hom.:

32801

Cov.:

AF XY:

0.656

AC XY:

48748

AN XY:

74284

show subpopulations

Gnomad4 AFR

AF:

0.613

Gnomad4 AMR

AF:

0.577

Gnomad4 ASJ

AF:

0.653

Gnomad4 EAS

AF:

0.950

Gnomad4 SAS

AF:

0.724

Gnomad4 FIN

AF:

0.698

Gnomad4 NFE

AF:

0.657

Gnomad4 OTH

AF:

0.639

Alfa

AF:

0.656

Hom.:

75761

Bravo

AF:

0.646

Asia WGS

AF:

0.818

AC:

2845

AN:

3478

EpiCase

AF:

0.645

EpiControl

AF:

0.644

ClinVar

Significance: Benign

Submissions summary: Benign:20Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:8

Clinical Genetics, Academic 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

- -

Sep 25, 2012

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. -

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Apr 10, 2023

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: TPM1 c.453C>A alters a conserved nucleotide resulting in a synonymous change. The variant allele was found at a frequency of 0.67 in 251338 control chromosomes, suggesting that it is the major allele and therefore benign. The observed variant frequency is approximately 9000 fold of the estimated maximal expected allele frequency for a pathogenic variant in TPM1 causing Cardiomyopathy phenotype (7.5e-05), strongly suggesting that the variant is benign. Seven clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 and all laboratories classified the variant as benign. Based on the evidence outlined above, the variant was classified as benign. -

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Jan 18, 2008

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hypertrophic cardiomyopathy 3

Benign:2

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Sep 10, 2021

Genome-Nilou Lab

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Cardiomyopathy

Benign:2

Sep 27, 2022

Cohesion Phenomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Apr 03, 2018

Color Diagnostics, LLC DBA Color Health

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dilated cardiomyopathy 1Y

Benign:2

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Sep 10, 2021

Genome-Nilou Lab

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hypertrophic cardiomyopathy

Benign:2

Feb 04, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Oct 02, 2024

All of Us Research Program, National Institutes of Health

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Benign:1Other:1

Apr 15, 2012

Leiden Muscular Dystrophy (TPM1)

Significance: not provided

Review Status: no classification provided

Collection Method: curation

- -

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Cardiovascular phenotype

Benign:1

Mar 11, 2015

Ambry Genetics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

TPM1-related disorder

Benign:1

Dec 07, 2023

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Hypertrophic cardiomyopathy 1

Benign:1

May 28, 2019

Mendelics

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

-0.28

CADD

Benign

DANN

Benign

0.95

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over