Genetic Variant MYOM2:p.Gln18* (chr8-2050818-C-T) – ACMG Classification: Likely_benign (-6 pts)

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP6_ModerateBS2

The NM_003970.4(MYOM2):c.52C>T(p.Gln18*) variant causes a stop gained change. The variant allele was found at a frequency of 0.000754 in 1,613,596 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.00060 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00077 ( 2 hom. )

Consequence

MYOM2
NM_003970.4 stop_gained

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 4.90

Publications

9 publications found

Variant links:

Genes affected

MYOM2 (HGNC:7614): (myomesin 2) 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 and 165 kD. The predicted MYOM2 protein contains 1,465 amino acids. Like MYOM1, MYOM2 has a unique N-terminal domain followed by 12 repeat domains with strong homology to either fibronectin type III or immunoglobulin C2 domains. Protein sequence comparisons suggested that the MYOM2 protein and bovine M protein are identical. [provided by RefSeq, Jul 2008]

MYOM2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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

BP6

Variant 8-2050818-C-T is Benign according to our data. Variant chr8-2050818-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 3770718.Status of the report is criteria_provided_single_submitter, 1 stars.

BS2

High Homozygotes in GnomAdExome4 at 2 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003970.4. 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
	MYOM2	NM_003970.4	MANE Select	c.52C>T	p.Gln18*	stop_gained	Exon 2 of 37	NP_003961.3	P54296

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
MYOM2	ENST00000262113.9	TSL:1 MANE Select	c.52C>T	p.Gln18*	stop_gained	Exon 2 of 37	ENSP00000262113.4	P54296
MYOM2	ENST00000887732.1		c.52C>T	p.Gln18*	stop_gained	Exon 2 of 38	ENSP00000557791.1
MYOM2	ENST00000887733.1		c.52C>T	p.Gln18*	stop_gained	Exon 2 of 38	ENSP00000557792.1

Frequencies

GnomAD3 genomes

AF:

0.000598

AC:

AN:

152234

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000851

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:

0.000999

Gnomad OTH

AF:

0.00191

GnomAD2 exomes

AF:

0.000632

AC:

159

AN:

251444

AF XY:

0.000633

show subpopulations

Gnomad AFR exome

AF:

0.000246

Gnomad AMR exome

AF:

0.00133

Gnomad ASJ exome

AF:

0.0000992

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000914

Gnomad OTH exome

AF:

0.000652

GnomAD4 exome

AF:

0.000770

AC:

1125

AN:

1461244

Hom.:

Cov.:

AF XY:

0.000747

AC XY:

543

AN XY:

726814

show subpopulations

African (AFR)

AF:

0.000239

AC:

AN:

33472

American (AMR)

AF:

0.00110

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39668

South Asian (SAS)

AF:

0.00

AC:

AN:

86234

European-Finnish (FIN)

AF:

0.0000374

AC:

AN:

53410

Middle Eastern (MID)

AF:

0.000173

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.000920

AC:

1023

AN:

1111468

Other (OTH)

AF:

0.000696

AC:

AN:

60378

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.416

Heterozygous variant carriers

121

182

242

303

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

108

144

180

<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:

0.000597

AC:

AN:

152352

Hom.:

Cov.:

AF XY:

0.000483

AC XY:

AN XY:

74504

show subpopulations

African (AFR)

AF:

0.000144

AC:

AN:

41590

American (AMR)

AF:

0.000850

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5182

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000999

AC:

AN:

68038

Other (OTH)

AF:

0.00189

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.498

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:

0.000830

Hom.:

Bravo

AF:

0.000725

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.00182

AC:

ESP6500AA

AF:

0.000454

AC:

ESP6500EA

AF:

0.000581

AC:

ExAC

AF:

0.000634

AC:

EpiCase

AF:

0.000655

EpiControl

AF:

0.000948

ClinVar

ClinVar submissions

Significance:Likely benign

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.31

BayesDel_noAF

Pathogenic

0.65

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

Eigen

Pathogenic

0.85

Eigen_PC

Pathogenic

0.68

FATHMM_MKL

Pathogenic

0.97

PhyloP100

4.9

Vest4

0.12

GERP RS

5.7

Mutation Taster

=7/193

disease causing (fs/PTC)

(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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over