NM_016599.5:c.237A>G

Variant names:

• chr4-119151032-A-G
• rs17851524
• NM_016599.5:c.237A>G

Variant summary

Our verdict is Benign. The variant received -17 ACMG points: 0P and 17B. BP4_Strong BP6_Very_Strong BP7 BS2

The NM_016599.5(MYOZ2):​c.237A>G​(p.Ala79Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0121 in 1,610,914 control chromosomes in the GnomAD database, including 148 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0093 (5 hom., cov: 32)
  • Exomes 𝑓: 0.012 (143 hom.)
• Consequence: MYOZ2 NM_016599.5 synonymous
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:15 O:1
• Conservation: PhyloP100: 0.221
• Publications: 6 publications found

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

LOC105379404 (HGNC:):

ACMG classification

Our verdict: Benign. The variant received -17 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.52).
• BP6: Variant 4-119151032-A-G is Benign according to our data. Variant chr4-119151032-A-G is described in ClinVar as Benign. ClinVar VariationId is 31788.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=0.221 with no splicing effect.
• BS2: High AC in GnomAd4 at 1416 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_016599.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MYOZ2	NM_016599.5	MANE Select	c.237A>G	p.Ala79Ala	synonymous	Exon 3 of 6	NP_057683.1
	MYOZ2	NM_001440645.1		c.237A>G	p.Ala79Ala	synonymous	Exon 3 of 7	NP_001427574.1
	MYOZ2	NM_001440646.1		c.237A>G	p.Ala79Ala	synonymous	Exon 3 of 6	NP_001427575.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MYOZ2	ENST00000307128.6	TSL:1 MANE Select	c.237A>G	p.Ala79Ala	synonymous	Exon 3 of 6	ENSP00000306997.6

Frequencies

GnomAD3 genomes AF: 0.00931 AC: 1417 AN: 152216 Hom.: 5 Cov.: 32

Gnomad AFR AF: 0.00263

Gnomad AMI AF: 0.00219

Gnomad AMR AF: 0.0117

Gnomad ASJ AF: 0.0147

Gnomad EAS AF: 0.000385

Gnomad SAS AF: 0.00228

Gnomad FIN AF: 0.00433

Gnomad MID AF: 0.0127

Gnomad NFE AF: 0.0145

Gnomad OTH AF: 0.0138

GnomAD2 exomes AF: 0.00947 AC: 2377 AN: 251068 AF XY: 0.00997

Gnomad AFR exome AF: 0.00215

Gnomad AMR exome AF: 0.00743

Gnomad ASJ exome AF: 0.0135

Gnomad EAS exome AF: 0.0000544

Gnomad FIN exome AF: 0.00473

Gnomad NFE exome AF: 0.0147

Gnomad OTH exome AF: 0.0116

GnomAD4 exome AF: 0.0124 AC: 18126 AN: 1458580 Hom.: 143 Cov.: 33 AF XY: 0.0121 AC XY: 8817 AN XY: 725858

African (AFR) AF: 0.00183 AC: 61 AN: 33388

American (AMR) AF: 0.00785 AC: 351 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.0141 AC: 367 AN: 26104

East Asian (EAS) AF: 0.00 AC: 0 AN: 39654

South Asian (SAS) AF: 0.00398 AC: 343 AN: 86180

European-Finnish (FIN) AF: 0.00617 AC: 329 AN: 53340

Middle Eastern (MID) AF: 0.0116 AC: 67 AN: 5764

European-Non Finnish (NFE) AF: 0.0143 AC: 15885 AN: 1109152

Other (OTH) AF: 0.0120 AC: 723 AN: 60278

GnomAD4 genome AF: 0.00930 AC: 1416 AN: 152334 Hom.: 5 Cov.: 32 AF XY: 0.00861 AC XY: 641 AN XY: 74488

African (AFR) AF: 0.00262 AC: 109 AN: 41588

American (AMR) AF: 0.0117 AC: 179 AN: 15294

Ashkenazi Jewish (ASJ) AF: 0.0147 AC: 51 AN: 3472

East Asian (EAS) AF: 0.000386 AC: 2 AN: 5186

South Asian (SAS) AF: 0.00228 AC: 11 AN: 4824

European-Finnish (FIN) AF: 0.00433 AC: 46 AN: 10618

Middle Eastern (MID) AF: 0.0102 AC: 3 AN: 294

European-Non Finnish (NFE) AF: 0.0145 AC: 984 AN: 68030

Other (OTH) AF: 0.0137 AC: 29 AN: 2116

Alfa AF: 0.0117 Hom.: 8

Bravo AF: 0.00945

Asia WGS AF: 0.000866 AC: 3 AN: 3478

EpiCase AF: 0.0154

EpiControl AF: 0.0168

ClinVar

Significance: Benign

Submissions summary: Benign:15 Other:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:4

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

Clinical Genetics, Academic Medical Center

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

Sep 08, 2011

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Mar 20, 2014

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease.

Hypertrophic cardiomyopathy 16 Benign:4

Nov 29, 2023

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

Sep 21, 2015

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

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Oct 10, 2014

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

not provided Benign:3 Other:1

Apr 20, 2012

Leiden Muscular Dystrophy (MYOZ2)

Significance: not provided

Review Status: no classification provided

Collection Method: curation

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

Aug 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

MYOZ2: BP4, BP7, BS1, BS2

Aug 25, 2017

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

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: The MYOZ2 c.237A>G (p.Ala79Ala) variant involves the alteration of a non-conserved nucleotide, resulting in a synonymous change. Mutation taster predicts a damaging 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 1202/121194 control chromosomes (9 homozygotes) from ExAC, predominantly observed in the European (Non-Finnish) subpopulation at a frequency of 0.014932 (995/66636). This frequency is about 597 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 European (Non-Finnish) 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.

Cardiomyopathy Benign:1

Mar 10, 2016

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

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Hypertrophic cardiomyopathy Benign:1

Jan 31, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Cardiovascular phenotype Benign:1

Nov 13, 2015

Ambry Genetics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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.

MYOZ2-related disorder Benign:1

Jul 15, 2019

PreventionGenetics, part of Exact Sciences

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications).

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.52
CADD	Benign	7.7
DANN	Benign	0.80
PhyloP100		0.22
Mutation Taster		=100/0	polymorphism

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

Other links and lift over

dbSNP: rs17851524; hg19: chr4-120072187;