rs115240600

Variant names:

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_003803.4(MYOM1):c.2673G>C(p.Leu891Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00243 in 1,613,892 control chromosomes in the GnomAD database, including 73 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.013 ( 36 hom., cov: 32)

Exomes 𝑓: 0.0013 ( 37 hom. )

Consequence

MYOM1
NM_003803.4 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: 2.75

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 -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.54).

BP6

Variant 18-3129353-C-G is Benign according to our data. Variant chr18-3129353-C-G is described in ClinVar as [Benign]. Clinvar id is 226814.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=2.75 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0131 (1999/152186) while in subpopulation AFR AF= 0.0455 (1888/41514). AF 95% confidence interval is 0.0438. There are 36 homozygotes in gnomad4. There are 954 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 36 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYOM1	NM_003803.4 link	c.2673G>C	p.Leu891Leu	synonymous_variant	Exon 18 of 38	ENST00000356443.9	NP_003794.3	P52179-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
MYOM1	ENST00000356443.9 link	c.2673G>C	p.Leu891Leu	synonymous_variant	Exon 18 of 38	1	NM_003803.4	ENSP00000348821.4	P52179-1
MYOM1	ENST00000261606.11 link	c.2506+2022G>C		intron_variant	Intron 17 of 36	1		ENSP00000261606.7	P52179-2
MYOM1	ENST00000582016.1 link	n.229G>C		non_coding_transcript_exon_variant	Exon 1 of 3	4

Frequencies

GnomAD3 genomes

AF:

0.0131

AC:

1997

AN:

152070

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0456

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00445

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000338

Gnomad OTH

AF:

0.00909

GnomAD3 exomes

AF:

0.00317

AC:

790

AN:

249256

Hom.:

AF XY:

0.00235

AC XY:

318

AN XY:

135218

show subpopulations

Gnomad AFR exome

AF:

0.0441

Gnomad AMR exome

AF:

0.00182

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000556

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000265

Gnomad OTH exome

AF:

0.00215

GnomAD4 exome

AF:

0.00132

AC:

1923

AN:

1461706

Hom.:

Cov.:

AF XY:

0.00112

AC XY:

817

AN XY:

727134

show subpopulations

Gnomad4 AFR exome

AF:

0.0439

Gnomad4 AMR exome

AF:

0.00224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000127

Gnomad4 OTH exome

AF:

0.00310

GnomAD4 genome

AF:

0.0131

AC:

1999

AN:

152186

Hom.:

Cov.:

AF XY:

0.0128

AC XY:

954

AN XY:

74398

show subpopulations

Gnomad4 AFR

AF:

0.0455

Gnomad4 AMR

AF:

0.00445

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000208

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000338

Gnomad4 OTH

AF:

0.00900

Alfa

AF:

0.00350

Hom.:

Bravo

AF:

0.0145

Asia WGS

AF:

0.00202

AC:

AN:

3478

EpiCase

AF:

0.000273

EpiControl

AF:

0.000474

ClinVar

Significance: Benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:1

Nov 24, 2014

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Leu891Leu in exon 18 of MYOM1: This variant is not expected to have clinical sig nificance because it does not alter an amino acid residue and is not located wit hin the splice consensus sequence. It has been identified in 4.1% (157/3794) of African American chromosomes from a broad population by the NHLBI Exome Sequenci ng Project (http://evs.gs.washington.edu/EVS; dbSNP rs115240600). -

not provided

Benign:1

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Hypertrophic cardiomyopathy

Benign:1

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Cardiovascular phenotype

Benign:1

Jan 24, 2013

Ambry Genetics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

General population or subpopulation frequency is too high to be a pathogenic mutation based on disease/syndrome prevalence and penetrance -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.54

CADD

Benign

DANN

Benign

0.52

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.18

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