NM_001103.4:c.1296G>A

Variant names:

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BA1

The NM_001103.4(ACTN2):c.1296G>A(p.Ala432Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0167 in 1,614,194 control chromosomes in the GnomAD database, including 654 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. A432A) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.041 ( 280 hom., cov: 32)

Exomes 𝑓: 0.014 ( 374 hom. )

Consequence

ACTN2
NM_001103.4 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:10

Conservation

PhyloP100: -2.70

Publications

4 publications found

Variant links:

Genes affected

ACTN2 (HGNC:164): (actinin alpha 2) Alpha actinins belong to the spectrin gene superfamily which represents a diverse group of cytoskeletal proteins, including the alpha and beta spectrins and dystrophins. Alpha actinin is an actin-binding protein with multiple roles in different cell types. In nonmuscle cells, the cytoskeletal isoform is found along microfilament bundles and adherens-type junctions, where it is involved in binding actin to the membrane. In contrast, skeletal, cardiac, and smooth muscle isoforms are localized to the Z-disc and analogous dense bodies, where they help anchor the myofibrillar actin filaments. This gene encodes a muscle-specific, alpha actinin isoform that is expressed in both skeletal and cardiac muscles. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2013]

ACTN2 Gene-Disease associations (from GenCC):

intrinsic cardiomyopathy
Inheritance: AD Classification: DEFINITIVE, MODERATE Submitted by: Laboratory for Molecular Medicine, ClinGen
myopathy, congenital, with structured cores and z-line abnormalities
Inheritance: AD Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
dilated cardiomyopathy 1AA
Inheritance: AD Classification: MODERATE, LIMITED Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), Ambry Genetics
familial isolated dilated cardiomyopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
heart conduction disease
Inheritance: AD Classification: LIMITED Submitted by: Genomics England PanelApp
myopathy, distal, 6, adult-onset, autosomal dominant
Inheritance: AD, Unknown Classification: LIMITED Submitted by: Broad Center for Mendelian Genomics, Labcorp Genetics (formerly Invitae)

ACTN2 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=-0.87).

BP6

Variant 1-236744666-G-A is Benign according to our data. Variant chr1-236744666-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 43899.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-2.7 with no splicing effect.

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.114 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ACTN2	NM_001103.4 link	c.1296G>A	p.Ala432Ala	synonymous_variant	Exon 12 of 21	ENST00000366578.6	NP_001094.1	P35609-1
ACTN2	NM_001278343.2 link	c.1296G>A	p.Ala432Ala	synonymous_variant	Exon 12 of 21		NP_001265272.1	P35609-2
ACTN2	NR_184402.1 link	n.1668G>A		non_coding_transcript_exon_variant	Exon 14 of 23

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ACTN2	ENST00000366578.6 link	c.1296G>A	p.Ala432Ala	synonymous_variant	Exon 12 of 21	1	NM_001103.4	ENSP00000355537.4		P35609-1

Frequencies

GnomAD3 genomes

AF:

0.0407

AC:

6198

AN:

152208

Hom.:

279

Cov.:

show subpopulations

Gnomad AFR

AF:

0.117

Gnomad AMI

AF:

0.00110

Gnomad AMR

AF:

0.0202

Gnomad ASJ

AF:

0.00663

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00393

Gnomad FIN

AF:

0.00490

Gnomad MID

AF:

0.0411

Gnomad NFE

AF:

0.0128

Gnomad OTH

AF:

0.0354

GnomAD2 exomes

AF:

0.0157

AC:

3954

AN:

251274

AF XY:

0.0137

show subpopulations

Gnomad AFR exome

AF:

0.119

Gnomad AMR exome

AF:

0.0111

Gnomad ASJ exome

AF:

0.00516

Gnomad EAS exome

AF:

0.000218

Gnomad FIN exome

AF:

0.00365

Gnomad NFE exome

AF:

0.0116

Gnomad OTH exome

AF:

0.0135

GnomAD4 exome

AF:

0.0142

AC:

20692

AN:

1461868

Hom.:

374

Cov.:

AF XY:

0.0136

AC XY:

9855

AN XY:

727238

show subpopulations

African (AFR)

AF:

0.119

AC:

3982

AN:

33478

American (AMR)

AF:

0.0124

AC:

555

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.00448

AC:

117

AN:

26136

East Asian (EAS)

AF:

0.000151

AC:

AN:

39700

South Asian (SAS)

AF:

0.00357

AC:

308

AN:

86256

European-Finnish (FIN)

AF:

0.00380

AC:

203

AN:

53416

Middle Eastern (MID)

AF:

0.0199

AC:

115

AN:

5766

European-Non Finnish (NFE)

AF:

0.0129

AC:

14363

AN:

1112000

Other (OTH)

AF:

0.0173

AC:

1043

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.476

Heterozygous variant carriers

1268

2536

3805

5073

6341

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

594

1188

1782

2376

2970

<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:

0.0408

AC:

6213

AN:

152326

Hom.:

280

Cov.:

AF XY:

0.0408

AC XY:

3039

AN XY:

74496

show subpopulations

African (AFR)

AF:

0.117

AC:

4850

AN:

41570

American (AMR)

AF:

0.0202

AC:

309

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00663

AC:

AN:

3468

East Asian (EAS)

AF:

0.000193

AC:

AN:

5178

South Asian (SAS)

AF:

0.00373

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00490

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.0408

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0128

AC:

873

AN:

68034

Other (OTH)

AF:

0.0351

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.501

Heterozygous variant carriers

307

614

922

1229

1536

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

124

186

248

310

<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:

0.0248

Hom.:

Bravo

AF:

0.0461

Asia WGS

AF:

0.00982

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:10

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:6

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Apr 09, 2025

Molecular Diagnostic Laboratory for Inherited Cardiovascular Disease, Montreal Heart Institute

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Dec 04, 2008

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Sep 25, 2012

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. -

Clinical Genetics, Academic Medical Center

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Primary familial hypertrophic cardiomyopathy;C2677338:Dilated cardiomyopathy 1AA

Benign:1

Feb 04, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:1

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Hypertrophic cardiomyopathy

Benign:1

Jun 14, 2016

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Cardiovascular phenotype

Benign:1

Jul 15, 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.87

CADD

Benign

0.077

(source)

DANN

Benign

0.63

PhyloP100

-2.7

Mutation Taster

=100/0

polymorphism (auto)

(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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over