Genetic Variant MYOZ2:c.561-15_561-13dupTTT (chr4-119185943-G-GTTT) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 0P and 0B.

The NM_016599.5(MYOZ2):c.561-15_561-13dupTTT variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000966 in 1,448,584 control chromosomes in the GnomAD database, with no homozygous occurrence. There is a variant allele frequency bias in the population database for this variant (GnomAdExome4), which may indicate mosaicism or somatic mutations in the reference population data. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0000067 ( 0 hom., cov: 18)

Exomes 𝑓: 0.000010 ( 0 hom. )

Consequence

MYOZ2
NM_016599.5 intron

Scores

Not classified

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.359

Publications

1 publications found

Variant links:

Genes affected

MYOZ2 (HGNC:1330): (myozenin 2) The protein encoded by this gene belongs to a family of sarcomeric proteins that bind to calcineurin, a phosphatase involved in calcium-dependent signal transduction in diverse cell types. These family members tether calcineurin to alpha-actinin at the z-line of the sarcomere of cardiac and skeletal muscle cells, and thus they are important for calcineurin signaling. Mutations in this gene cause cardiomyopathy familial hypertrophic type 16, a hereditary heart disorder. [provided by RefSeq, Aug 2011]

MYOZ2 Gene-Disease associations (from GenCC):

hypertrophic cardiomyopathy 16
Inheritance: AD Classification: LIMITED Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), Ambry Genetics
hypertrophic cardiomyopathy
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

MYOZ2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYOZ2	NM_016599.5 link	c.561-15_561-13dupTTT		intron_variant	Intron 5 of 5	ENST00000307128.6	NP_057683.1	Q9NPC6
MYOZ2	NM_001440645.1 link	c.607-15_607-13dupTTT		intron_variant	Intron 6 of 6		NP_001427574.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MYOZ2	ENST00000307128.6 link	c.561-15_561-13dupTTT		intron_variant	Intron 5 of 5	1	NM_016599.5	ENSP00000306997.6		Q9NPC6

Frequencies

GnomAD3 genomes

AF:

0.00000670

AC:

AN:

149260

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000246

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.00

GnomAD2 exomes

AF:

0.0000111

AC:

AN:

180466

AF XY:

0.0000204

show subpopulations

Gnomad AFR exome

AF:

0.0000809

Gnomad AMR exome

AF:

0.0000403

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000100

AC:

AN:

1299324

Hom.:

Cov.:

AF XY:

0.00000615

AC XY:

AN XY:

649896

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.000207

AC:

AN:

29008

American (AMR)

AF:

0.0000244

AC:

AN:

40974

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

23792

East Asian (EAS)

AF:

0.00

AC:

AN:

36482

South Asian (SAS)

AF:

0.0000128

AC:

AN:

77892

European-Finnish (FIN)

AF:

0.00

AC:

AN:

47520

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5310

European-Non Finnish (NFE)

AF:

0.00000508

AC:

AN:

984466

Other (OTH)

AF:

0.00

AC:

AN:

53880

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000289633), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.337

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

AF:

0.00000670

AC:

AN:

149260

Hom.:

Cov.:

AF XY:

0.0000138

AC XY:

AN XY:

72652

show subpopulations

African (AFR)

AF:

0.0000246

AC:

AN:

40710

American (AMR)

AF:

0.00

AC:

AN:

14982

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3438

East Asian (EAS)

AF:

0.00

AC:

AN:

5124

South Asian (SAS)

AF:

0.00

AC:

AN:

4722

European-Finnish (FIN)

AF:

0.00

AC:

AN:

9982

Middle Eastern (MID)

AF:

0.00

AC:

AN:

306

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67036

Other (OTH)

AF:

0.00

AC:

AN:

2060

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

221

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

-0.36

Splicing

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over