18-3102596-A-T

Position:

chr18-3102596-A-T

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_003803.4(MYOM1):c.3453T>A(p.Asp1151Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000965 in 1,613,928 control chromosomes in the GnomAD database, including 13 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0054 ( 6 hom., cov: 32)

Exomes 𝑓: 0.00051 ( 7 hom. )

Consequence

MYOM1
NM_003803.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: 0.513

Variant links:

Genes affected

MYOM1 (HGNC:7613): (myomesin 1) The giant protein titin, together with its associated proteins, interconnects the major structure of sarcomeres, the M bands and Z discs. The C-terminal end of the titin string extends into the M line, where it binds tightly to M-band constituents of apparent molecular masses of 190 kD (myomesin 1) and 165 kD (myomesin 2). This protein, myomesin 1, like myomesin 2, titin, and other myofibrillar proteins contains structural modules with strong homology to either fibronectin type III (motif I) or immunoglobulin C2 (motif II) domains. Myomesin 1 and myomesin 2 each have a unique N-terminal region followed by 12 modules of motif I or motif II, in the arrangement II-II-I-I-I-I-I-II-II-II-II-II. The two proteins share 50% sequence identity in this repeat-containing region. The head structure formed by these 2 proteins on one end of the titin string extends into the center of the M band. The integrating structure of the sarcomere arises from muscle-specific members of the superfamily of immunoglobulin-like proteins. Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Jul 2008]

MYOM1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.008228898).

BP6

Variant 18-3102596-A-T is Benign according to our data. Variant chr18-3102596-A-T is described in ClinVar as [Likely_benign]. Clinvar id is 226818.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00538 (819/152330) while in subpopulation AFR AF= 0.0188 (781/41576). AF 95% confidence interval is 0.0177. There are 6 homozygotes in gnomad4. There are 381 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 6 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYOM1	NM_003803.4 linkuse as main transcript	c.3453T>A	p.Asp1151Glu	missense_variant	23/38	ENST00000356443.9	NP_003794.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MYOM1	ENST00000356443.9 linkuse as main transcript	c.3453T>A	p.Asp1151Glu	missense_variant	23/38	1	NM_003803.4	ENSP00000348821	P2	P52179-1
MYOM1	ENST00000261606.11 linkuse as main transcript	c.3165T>A	p.Asp1055Glu	missense_variant	22/37	1		ENSP00000261606	A2	P52179-2

Frequencies

GnomAD3 genomes

AF:

0.00537

AC:

817

AN:

152212

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0188

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00190

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:

0.0000147

Gnomad OTH

AF:

0.00382

GnomAD3 exomes

AF:

0.00135

AC:

337

AN:

249120

Hom.:

AF XY:

0.000932

AC XY:

126

AN XY:

135142

show subpopulations

Gnomad AFR exome

AF:

0.0196

Gnomad AMR exome

AF:

0.000841

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000266

Gnomad OTH exome

AF:

0.000166

GnomAD4 exome

AF:

0.000506

AC:

739

AN:

1461598

Hom.:

Cov.:

AF XY:

0.000433

AC XY:

315

AN XY:

727082

show subpopulations

Gnomad4 AFR exome

AF:

0.0184

Gnomad4 AMR exome

AF:

0.000828

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000126

Gnomad4 OTH exome

AF:

0.000977

GnomAD4 genome

AF:

0.00538

AC:

819

AN:

152330

Hom.:

Cov.:

AF XY:

0.00512

AC XY:

381

AN XY:

74486

show subpopulations

Gnomad4 AFR

AF:

0.0188

Gnomad4 AMR

AF:

0.00189

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00378

Alfa

AF:

0.000834

Hom.:

Bravo

AF:

0.00556

ESP6500AA

AF:

0.0176

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00162

AC:

196

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

Benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Nov 24, 2014	Asp1151Glu in exon 23 of MYOM1: This variant is not expected to have clinical si gnificance because it has been identified in 1.8% (67/3808) of African American chromosomes from a broad population by the NHLBI Exome Sequencing Project (http: //evs.gs.washington.edu/EVS; dbSNP rs143879853). -
Likely benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Sep 05, 2022	This alteration is classified as likely 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. -

MYOM1-related disorder

Benign:1

Benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Feb 20, 2019

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

not provided

Benign:1

Benign, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

- -

Hypertrophic cardiomyopathy

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 31, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.35

BayesDel_addAF

Benign

-0.68

BayesDel_noAF

Benign

-0.73

CADD

Benign

DANN

Benign

0.87

DEOGEN2

Benign

0.035

T;.;.

Eigen

Benign

-0.68

Eigen_PC

Benign

-0.48

FATHMM_MKL

Benign

0.71

LIST_S2

Benign

0.82

T;T;T

MetaRNN

Benign

0.0082

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.93

L;.;.

MutationTaster

Benign

0.99

D;D;D

PrimateAI

Benign

0.33

PROVEAN

Benign

-0.50

N;.;N

REVEL

Benign

0.073

Sift

Benign

1.0

T;.;T

Sift4G

Benign

1.0

T;T;T

Polyphen

0.0010

B;.;B

Vest4

0.26

MutPred

0.25

Gain of sheet (P = 0.0477);.;.;

MVP

0.56

MPC

0.14

ClinPred

0.0049

GERP RS

1.7

Varity_R

0.077

gMVP

0.43

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