chr18-3215114-G-A

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP4BP6BS2

The NM_003803.4(MYOM1):c.110C>T(p.Ala37Val) variant causes a missense change. The variant allele was found at a frequency of 0.000291 in 1,613,604 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00024 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00030 ( 0 hom. )

Consequence

MYOM1
NM_003803.4 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 6.71

Publications

2 publications found

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 Gene-Disease associations (from GenCC):

hypertrophic cardiomyopathy
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

MYOM1 links:

ENSG00000265399 (HGNC:):

ENSG00000265399 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.27630842).

BP6

Variant 18-3215114-G-A is Benign according to our data. Variant chr18-3215114-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 239564.

BS2

High AC in GnomAd4 at 36 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYOM1	NM_003803.4 link	c.110C>T	p.Ala37Val	missense_variant	Exon 2 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.110C>T	p.Ala37Val	missense_variant	Exon 2 of 38	1	NM_003803.4	ENSP00000348821.4	P52179-1
MYOM1	ENST00000261606.11 link	c.110C>T	p.Ala37Val	missense_variant	Exon 2 of 37	1		ENSP00000261606.7	P52179-2
ENSG00000265399	ENST00000580139.1 link	n.198-1878G>A		intron_variant	Intron 2 of 4	2

Frequencies

GnomAD3 genomes

AF:

0.000237

AC:

AN:

152034

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000652

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.0000883

Gnomad OTH

AF:

0.000958

GnomAD2 exomes

AF:

0.000125

AC:

AN:

248278

AF XY:

0.000119

show subpopulations

Gnomad AFR exome

AF:

0.000520

Gnomad AMR exome

AF:

0.000145

Gnomad ASJ exome

AF:

0.000200

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000125

Gnomad OTH exome

AF:

0.000332

GnomAD4 exome

AF:

0.000296

AC:

433

AN:

1461570

Hom.:

Cov.:

AF XY:

0.000289

AC XY:

210

AN XY:

727078

show subpopulations

African (AFR)

AF:

0.000777

AC:

AN:

33480

American (AMR)

AF:

0.000157

AC:

AN:

44712

Ashkenazi Jewish (ASJ)

AF:

0.000191

AC:

AN:

26126

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.00

AC:

AN:

86252

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53320

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

0.000349

AC:

388

AN:

1111848

Other (OTH)

AF:

0.000116

AC:

AN:

60370

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.476

Heterozygous variant carriers

103

129

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000237

AC:

AN:

152034

Hom.:

Cov.:

AF XY:

0.000215

AC XY:

AN XY:

74268

show subpopulations

African (AFR)

AF:

0.000652

AC:

AN:

41396

American (AMR)

AF:

0.0000654

AC:

AN:

15280

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5162

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000883

AC:

AN:

67968

Other (OTH)

AF:

0.000958

AC:

AN:

2088

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.501

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000214

Hom.:

Bravo

AF:

0.000234

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000778

AC:

ESP6500AA

AF:

0.000726

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000140

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000109

EpiControl

AF:

0.000237

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

Dec 26, 2023

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.110C>T (p.A37V) alteration is located in exon 2 (coding exon 1) of the MYOM1 gene. This alteration results from a C to T substitution at nucleotide position 110, causing the alanine (A) at amino acid position 37 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Hypertrophic cardiomyopathy

Benign:1

Jan 23, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.22

BayesDel_addAF

Benign

-0.30

BayesDel_noAF

Benign

-0.24

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.036

T;.

Eigen

Uncertain

0.30

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.89

D;D

M_CAP

Benign

0.015

MetaRNN

Benign

0.28

T;T

MetaSVM

Benign

-0.65

MutationAssessor

Uncertain

2.1

M;M

PhyloP100

6.7

PrimateAI

Uncertain

0.52

PROVEAN

Benign

-0.79

N;N

REVEL

Benign

0.11

Sift

Uncertain

0.0040

D;D

Sift4G

Uncertain

0.017

D;D

Polyphen

0.47

P;P

Vest4

0.61

MVP

0.88

MPC

0.14

ClinPred

0.076

GERP RS

5.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.15

gMVP

0.67

Mutation Taster

=80/20

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over