4-119136516-C-CA

Variant summary

Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP6_Very_StrongBS1BS2

The NM_016599.5(MYOZ2):c.-3dup variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00101 in 1,612,438 control chromosomes in the GnomAD database, including 12 homozygotes. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0053 ( 6 hom., cov: 32)

Exomes 𝑓: 0.00056 ( 6 hom. )

Consequence

MYOZ2
NM_016599.5 5_prime_UTR

Scores

Not classified

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:6

Conservation

PhyloP100: 1.31

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -16 ACMG points.

BP6

Variant 4-119136516-C-CA is Benign according to our data. Variant chr4-119136516-C-CA is described in ClinVar as [Benign]. Clinvar id is 45778.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00534 (812/152014) while in subpopulation AFR AF= 0.0169 (699/41464). AF 95% confidence interval is 0.0158. There are 6 homozygotes in gnomad4. There are 385 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High AC in GnomAd at 805 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MYOZ2	NM_016599.5 linkuse as main transcript	c.-3dup		5_prime_UTR_variant	2/6	ENST00000307128.6
MYOZ2	XM_006714234.5 linkuse as main transcript	c.-3dup		5_prime_UTR_variant	2/6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MYOZ2	ENST00000307128.6 linkuse as main transcript	c.-3dup		5_prime_UTR_variant	2/6	1	NM_016599.5	P1

Frequencies

GnomAD3 genomes

AF:

0.00530

AC:

805

AN:

151896

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0168

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00629

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.0000883

Gnomad OTH

AF:

0.00431

GnomAD3 exomes

AF:

0.00116

AC:

290

AN:

249782

Hom.:

AF XY:

0.000859

AC XY:

116

AN XY:

135000

show subpopulations

Gnomad AFR exome

AF:

0.0155

Gnomad AMR exome

AF:

0.000900

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000546

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000266

Gnomad OTH exome

AF:

0.000822

GnomAD4 exome

AF:

0.000559

AC:

817

AN:

1460424

Hom.:

Cov.:

AF XY:

0.000471

AC XY:

342

AN XY:

726522

show subpopulations

Gnomad4 AFR exome

AF:

0.0192

Gnomad4 AMR exome

AF:

0.00128

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000990

Gnomad4 OTH exome

AF:

0.00167

GnomAD4 genome

AF:

0.00534

AC:

812

AN:

152014

Hom.:

Cov.:

AF XY:

0.00518

AC XY:

385

AN XY:

74302

show subpopulations

Gnomad4 AFR

AF:

0.0169

Gnomad4 AMR

AF:

0.00628

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000883

Gnomad4 OTH

AF:

0.00427

Alfa

AF:

0.00200

Hom.:

Bravo

AF:

0.00677

ClinVar

Significance: Benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

Benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 03, 2015	This variant was found in CARDIOMYOPATHY,CRDMV2-PANCARD -
Benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Feb 25, 2013	-3_-2insA in exon 2 of MYOZ2: This variant is not expected to have clinical sign ificance because it has been identified in 1.2% (51/4268) of African American ch romosomes from a broad population by the NHLBI Exome Sequencing Project (http:// evs.gs.washington.edu/EVS/) . -3_-2insA in exon 2 of MYOZ2 (allele frequency = 1.2%, 51/4268) ** -

Cardiomyopathy

Benign:1

Benign, criteria provided, single submitter

clinical testing

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

May 03, 2016

- -

not provided

Benign:1

Benign, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Aug 25, 2017

Variant summary: The MYOZ2 c.-3dupA variant (also known as c.-3_-2insA) involves insertion of a nucleotide in non-coding exon 2. Mutation taster predicts a benign outcome for this variant. 5/5 splice prediction tools predict no significant impact on normal splicing. ESE finder predicts that this variant may not affect binding of ESE sites. However, these predictions have yet to be confirmed by functional studies. This variant was found in 176/115548 control chromosomes (1 homozygote) from ExAC, predominantly observed in the African subpopulation at a frequency of 0.015706 (157/9996). This frequency is about 628 times the estimated maximal expected allele frequency of a pathogenic MYOZ2 variant (0.000025), suggesting this is likely a benign polymorphism found primarily in the populations of African origin. In addition, multiple clinical diagnostic laboratories in ClinVar have classified this variant as benign. The variant of interest has not, to our knowledge, been reported in affected individuals in literature. Taken together, this variant is classified as benign. -

Cardiovascular phenotype

Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 13, 2018

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Hypertrophic cardiomyopathy 16

Benign:1

Benign, criteria provided, single submitter

clinical testing

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Sep 21, 2015

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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