18-3151724-G-C

Position:

chr18-3151724-G-C

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBP6

The NM_003803.4(MYOM1):c.1813C>G(p.Leu605Val) variant causes a missense change. The variant allele was found at a frequency of 0.000129 in 1,613,772 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00067 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000073 ( 0 hom. )

Consequence

MYOM1
NM_003803.4 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 5.30

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 Likely_benign. Variant got -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.018050015).

BP6

Variant 18-3151724-G-C is Benign according to our data. Variant chr18-3151724-G-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 454432.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYOM1	NM_003803.4 linkuse as main transcript	c.1813C>G	p.Leu605Val	missense_variant	12/38	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.1813C>G	p.Leu605Val	missense_variant	12/38	1	NM_003803.4	ENSP00000348821	P2	P52179-1
MYOM1	ENST00000261606.11 linkuse as main transcript	c.1813C>G	p.Leu605Val	missense_variant	12/37	1		ENSP00000261606	A2	P52179-2

Frequencies

GnomAD3 genomes

AF:

0.000670

AC:

102

AN:

152150

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00237

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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:

0.00

Gnomad OTH

AF:

0.000959

GnomAD3 exomes

AF:

0.000213

AC:

AN:

249100

Hom.:

AF XY:

0.000148

AC XY:

AN XY:

135126

show subpopulations

Gnomad AFR exome

AF:

0.00323

Gnomad AMR exome

AF:

0.0000580

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000725

AC:

106

AN:

1461504

Hom.:

Cov.:

AF XY:

0.0000633

AC XY:

AN XY:

727030

show subpopulations

Gnomad4 AFR exome

AF:

0.00266

Gnomad4 AMR exome

AF:

0.000112

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:

9.00e-7

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.000670

AC:

102

AN:

152268

Hom.:

Cov.:

AF XY:

0.000524

AC XY:

AN XY:

74448

show subpopulations

Gnomad4 AFR

AF:

0.00236

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000949

Alfa

AF:

0.000101

Hom.:

Bravo

AF:

0.000782

ESP6500AA

AF:

0.00371

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000224

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 16, 2023

The p.L605V variant (also known as c.1813C>G), located in coding exon 11 of the MYOM1 gene, results from a C to G substitution at nucleotide position 1813. The leucine at codon 605 is replaced by valine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Hypertrophic cardiomyopathy

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 01, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.14

BayesDel_addAF

Benign

-0.42

BayesDel_noAF

Benign

-0.39

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.035

T;.;.

Eigen

Uncertain

0.42

Eigen_PC

Uncertain

0.43

FATHMM_MKL

Uncertain

0.82

LIST_S2

Benign

0.85

D;T;T

M_CAP

Benign

0.021

MetaRNN

Benign

0.018

T;T;T

MetaSVM

Benign

-0.68

MutationAssessor

Benign

1.2

L;.;L

MutationTaster

Benign

0.99

D;D;N

PrimateAI

Benign

0.42

PROVEAN

Benign

-1.4

N;.;N

REVEL

Benign

0.14

Sift

Benign

0.067

T;.;T

Sift4G

Uncertain

0.043

D;D;D

Polyphen

0.93

P;.;P

Vest4

0.35

MVP

0.76

MPC

0.32

ClinPred

0.052

GERP RS

4.2

Varity_R

0.35

gMVP

0.33

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