dbSNP rs115240600: MYOM1:p.Leu891Leu (chr18-3129353-C-G) – ACMG Classification: Benign (-21 pts)

Variant summary

Our verdict is Benign. The variant received -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

Publications

1 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:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -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 VariationId 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 the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 1999 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003803.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MYOM1	NM_003803.4	MANE Select	c.2673G>C	p.Leu891Leu	synonymous	Exon 18 of 38	NP_003794.3
	MYOM1	NM_019856.2		c.2506+2022G>C		intron	N/A	NP_062830.1	P52179-2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
MYOM1	ENST00000356443.9	TSL:1 MANE Select	c.2673G>C	p.Leu891Leu	synonymous	Exon 18 of 38	ENSP00000348821.4	P52179-1
MYOM1	ENST00000261606.11	TSL:1	c.2506+2022G>C		intron	N/A	ENSP00000261606.7	P52179-2
MYOM1	ENST00000941943.1		c.2673G>C	p.Leu891Leu	synonymous	Exon 18 of 38	ENSP00000612002.1

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

GnomAD2 exomes

AF:

0.00317

AC:

790

AN:

249256

AF XY:

0.00235

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 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

African (AFR)

AF:

0.0439

AC:

1469

AN:

33478

American (AMR)

AF:

0.00224

AC:

100

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000232

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53400

Middle Eastern (MID)

AF:

0.00416

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000127

AC:

141

AN:

1111868

Other (OTH)

AF:

0.00310

AC:

187

AN:

60374

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.464

Heterozygous variant carriers

105

210

314

419

524

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

150

200

250

<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:

0.0131

AC:

1999

AN:

152186

Hom.:

Cov.:

AF XY:

0.0128

AC XY:

954

AN XY:

74398

show subpopulations

African (AFR)

AF:

0.0455

AC:

1888

AN:

41514

American (AMR)

AF:

0.00445

AC:

AN:

15286

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5176

South Asian (SAS)

AF:

0.000208

AC:

AN:

4816

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10596

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000338

AC:

AN:

68014

Other (OTH)

AF:

0.00900

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.502

Heterozygous variant carriers

179

269

358

448

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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

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

ClinVar submissions

Significance:Benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Cardiovascular phenotype (1)

Hypertrophic cardiomyopathy (1)

not provided (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.54

CADD

Benign

(source)

DANN

Benign

0.52

PhyloP100

2.8

Mutation Taster

=99/1

polymorphism

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over