NM_006790.3:c.179C>T

Variant names:

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PS1_ModeratePM5PP5_Very_Strong

The NM_006790.3(MYOT):c.179C>T(p.Ser60Phe) variant causes a missense change. The variant allele was found at a frequency of 0.0000155 in 1,614,066 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely pathogenic in UniProt. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S60C) has been classified as Likely pathogenic.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

MYOT
NM_006790.3 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:12

Conservation

PhyloP100: 5.43

Variant links:

Genes affected

MYOT (HGNC:12399): (myotilin) This gene encodes a cystoskeletal protein which plays a significant role in the stability of thin filaments during muscle contraction. This protein binds F-actin, crosslinks actin filaments, and prevents latrunculin A-induced filament disassembly. Mutations in this gene have been associated with limb-girdle muscular dystrophy and myofibrillar myopathies. Several alternatively spliced transcript variants of this gene have been described, but the full-length nature of some of these variants has not been determined.[provided by RefSeq, Oct 2008]

MYOT links:

PKD2L2-DT (HGNC:55557): (PKD2L2 divergent transcript)

PKD2L2-DT links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 12 ACMG points.

PS1

Transcript NM_006790.3 (MYOT) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in UniProt

PM5

Other missense variant is known to change same aminoacid residue: Variant chrnull-null-null-null is described in UniProt as null.

PP5

Variant 5-137870830-C-T is Pathogenic according to our data. Variant chr5-137870830-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 5837.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr5-137870830-C-T is described in Lovd as [Pathogenic]. Variant chr5-137870830-C-T is described in Lovd as [Likely_pathogenic]. Variant chr5-137870830-C-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYOT	NM_006790.3 link	c.179C>T	p.Ser60Phe	missense_variant	Exon 2 of 10	ENST00000239926.9	NP_006781.1	Q9UBF9A0A0C4DFM5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MYOT	ENST00000239926.9 link	c.179C>T	p.Ser60Phe	missense_variant	Exon 2 of 10	1	NM_006790.3	ENSP00000239926.4		A0A0C4DFM5

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152176

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000361

AC:

AN:

249028

Hom.:

AF XY:

0.0000371

AC XY:

AN XY:

134792

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000719

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000157

AC:

AN:

1461890

Hom.:

Cov.:

AF XY:

0.0000179

AC XY:

AN XY:

727248

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000189

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152176

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74336

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000264

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000412

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000119

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:12

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Myofibrillar myopathy 3

Pathogenic:6

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces serine, which is neutral and polar, with phenylalanine, which is neutral and non-polar, at codon 60 of the MYOT protein (p.Ser60Phe). This variant is present in population databases (rs121908458, gnomAD 0.007%). This missense change has been observed in individuals with myofibrillar myopathy (PMID: 15111675, 15947064, 16793270, 19225410, 19590214, 21676617, 25208129, 26842778, 27854214). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 5837). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt MYOT protein function with a negative predictive value of 80%. Experimental studies have shown that this missense change affects MYOT function (PMID: 21361873). For these reasons, this variant has been classified as Pathogenic. -

Apr 27, 2004

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Jun 07, 2019

Institute of Human Genetics Munich, Klinikum Rechts Der Isar, TU München

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Nov 13, 2023

Revvity Omics, Revvity

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

May 17, 2022

MGZ Medical Genetics Center

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Feb 28, 2024

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

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: MYOT c.179C>T (p.Ser60Phe) results in a non-conservative amino acid change in the encoded protein sequence. Three of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 3.6e-05 in 249028 control chromosomes. c.179C>T has been reported in the literature in multiple individuals affected with dominant late-onset myofibrillar myopathy (e.g. Rudolf_2016). These data indicate that the variant is very likely to be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication has been ascertained in the context of this evaluation (PMID: 27854214). ClinVar contains an entry for this variant (Variation ID: 5837). Based on the evidence outlined above, the variant was classified as pathogenic. -

not provided

Pathogenic:5

Dec 27, 2023

Clinical Genetics Laboratory, Skane University Hospital Lund

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jul 28, 2021

Athena Diagnostics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is statistically more frequent in affected individuals than in the general population and/or healthy controls and is therefore consistent with pathogenicity. This variant appears to be associated with disease in at least one family. At least one other missense variant at this codon is considered to be pathogenic or likely pathogenic, suggesting this variant may also cause disease. Computational tools predict that this variant is damaging. -

Mar 01, 2021

CeGaT Center for Human Genetics Tuebingen

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Oct 06, 2016

Eurofins Ntd Llc (ga)

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 17, 2021

GeneDx

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Reported previously as a heterozygous change in an individual with onset of symptoms of myofibrillar myopathy at age 77 (Selcen et al., 2004; Functional studies of MYOT constructs encoding S60F failed to exhibit altered myotube dynamics; however, the authors suggested that other aspects of protein function not tested by their assay may be affected (Wang et al., 2011); Missense variants in this gene are often considered pathogenic (Stenson et al., 2014); In silico analysis supports that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 32528171, 31589614, 32419263, 32647524, 32509353, 32403337, 31407473, 25208129, 31517061, 19590214, 15111675, 22021208, 27854214) -

MYOT-related disorder

Pathogenic:1

Jul 27, 2023

PreventionGenetics, part of Exact Sciences

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The MYOT c.179C>T variant is predicted to result in the amino acid substitution p.Ser60Phe. This variant has been reported in the heterozygous state in many unrelated individuals with myofibrillar myopathy (Selcen et al. 2004. PubMed ID: 15111675; McNeill et al. 2009. PubMed ID: 19590214; Semmler et al. 2014. PubMed ID: 25208129; Finsterer et al. 2020 PubMed ID: 32509353; Pénisson-Besnier et al. 2006. PubMed ID: 16793270). Additionally, an alternate substitution at this amino acid position (p.Ser60Cys) has been reported as causative in individuals with myofibrillar myopathy (Selcen et al. 2004. PubMed ID: 15111675). This variant is reported in 0.0071% of alleles in individuals of European (Non-Finnish) descent in gnomAD (http://gnomad.broadinstitute.org/variant/5-137206519-C-T). This variant is interpreted as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.39

BayesDel_addAF

Pathogenic

0.19

BayesDel_noAF

Pathogenic

0.22

CADD

Pathogenic

DANN

Uncertain

1.0

Eigen

Uncertain

0.48

Eigen_PC

Uncertain

0.59

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.88

M_CAP

Benign

0.051

MetaRNN

Uncertain

0.70

MetaSVM

Benign

-0.62

PrimateAI

Uncertain

0.56

PROVEAN

Benign

-0.93

REVEL

Uncertain

0.41

Sift

Uncertain

0.0020

Sift4G

Benign

0.067

Vest4

0.87

MVP

0.90

MPC

0.71

ClinPred

0.30

GERP RS

6.0

gMVP

0.71

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