NM_001103.4:c.2147C>T

Variant names:

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBP6BS2

The NM_001103.4(ACTN2):c.2147C>T(p.Thr716Met) variant causes a missense change. The variant allele was found at a frequency of 0.000289 in 1,614,034 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. T716T) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00022 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00030 ( 0 hom. )

Consequence

ACTN2
NM_001103.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:6B:9

Conservation

PhyloP100: 6.10

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.05477962).

BP6

Variant 1-236755191-C-T is Benign according to our data. Variant chr1-236755191-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 35650.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=4, Benign=2, Likely_benign=4}. Variant chr1-236755191-C-T is described in Lovd as [Likely_benign].

BS2

High AC in GnomAd4 at 34 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ACTN2	NM_001103.4 link	c.2147C>T	p.Thr716Met	missense_variant	Exon 17 of 21	ENST00000366578.6	NP_001094.1	P35609-1
ACTN2	NM_001278343.2 link	c.2147C>T	p.Thr716Met	missense_variant	Exon 17 of 21		NP_001265272.1	P35609-2
ACTN2	NR_184402.1 link	n.2519C>T		non_coding_transcript_exon_variant	Exon 19 of 23

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ACTN2	ENST00000366578.6 link	c.2147C>T	p.Thr716Met	missense_variant	Exon 17 of 21	1	NM_001103.4	ENSP00000355537.4		P35609-1

Frequencies

GnomAD3 genomes

AF:

0.000223

AC:

AN:

152204

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00605

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000176

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000423

AC:

106

AN:

250452

Hom.:

AF XY:

0.000487

AC XY:

AN XY:

135398

show subpopulations

Gnomad AFR exome

AF:

0.0000617

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00577

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.000363

Gnomad OTH exome

AF:

0.000490

GnomAD4 exome

AF:

0.000296

AC:

433

AN:

1461830

Hom.:

Cov.:

AF XY:

0.000297

AC XY:

216

AN XY:

727206

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00578

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000375

Gnomad4 NFE exome

AF:

0.000220

Gnomad4 OTH exome

AF:

0.000447

GnomAD4 genome

AF:

0.000223

AC:

AN:

152204

Hom.:

Cov.:

AF XY:

0.000175

AC XY:

AN XY:

74350

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00605

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000176

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000602

Hom.:

Bravo

AF:

0.000257

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000329

AC:

EpiCase

AF:

0.000491

EpiControl

AF:

0.000296

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:6Benign:9

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:6

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Aug 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

ACTN2: BS1 -

Feb 06, 2024

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

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

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Feb 18, 2021

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 25333069, 25611685) -

Jan 28, 2016

Stanford Center for Inherited Cardiovascular Disease, Stanford University

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: provider interpretation

- -

Cardiomyopathy

Uncertain:1Benign:1

Oct 02, 2015

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

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Jul 05, 2018

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

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not specified

Uncertain:1

Feb 25, 2015

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant classified as Uncertain Significance - Favor Benign. The p.Thr716Met var iant in ACTN2 has been previously identified by our laboratory in 4 individuals with a range of cardiac features (1 adult with HCM, 1 adult with ARVC, 1 adolesc ent with mitral valve prolapse, and 1 adult with LVH and a mildly dilated LA). I t has also been identified in 0.1% (39/66254) of European chromosomes by the Exo me Aggregation Consortium (ExAC, http://exac.broadinstitute.org; dbSNP rs1939226 35). Computational prediction tools and conservation analysis do not provide str ong support for or against an impact to the protein. In summary, while the clini cal significance of the p.Thr716Met variant is uncertain, these data suggest tha t it is more likely to be benign. -

Dilated cardiomyopathy 1AA

Uncertain:1

Apr 27, 2017

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

Primary familial hypertrophic cardiomyopathy

Uncertain:1

Apr 06, 2017

Molecular Diagnostic Laboratory for Inherited Cardiovascular Disease, Montreal Heart Institute

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hypertrophic cardiomyopathy 1

Uncertain:1

Mar 20, 2015

Agnes Ginges Centre for Molecular Cardiology, Centenary Institute

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: research

The ACTN2 Thr716Met variant has been previously reported to occur in the Exome Aggregation Consortium dataset (http://exac.broadinstitute.org/) at a frequency of 0.0003, and sub-population frequency of European (non-Finnish) individuals at 0.00059 (39/66254 alleles). The variant is absent in the 1000 genomes project (http://www.1000genomes.org/). Threonine (Thr) at position 716 is relatively conserved across distantly related species, and in silico tools are supportive of a damaging effect (SIFT "deleterious"; PolyPhen2 "probably damaging"; MutationTaster "disease-causing"; CADD score = 19), however this alone cannot be considered as strong evidence for pathogenicity. We have identified the ACTN2 Thr716Met variant in a single HCM proband of European descent. The patient was diagnosed aged 50 years, with asymmetric septal hypertophy of 20mm, and no established family history of disease. Based on the limited evidence, we call this variant one of "uncertain significance". -

Primary familial hypertrophic cardiomyopathy;C2677338:Dilated cardiomyopathy 1AA

Benign:1

Jan 29, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Cardiovascular phenotype

Benign:1

Sep 18, 2018

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely 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

AlphaMissense

Pathogenic

0.59

BayesDel_addAF

Benign

-0.19

BayesDel_noAF

Benign

-0.21

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.59

.;.;D

Eigen

Uncertain

0.67

Eigen_PC

Uncertain

0.60

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.97

D;D;D

M_CAP

Benign

0.076

MetaRNN

Benign

0.055

T;T;T

MetaSVM

Benign

-0.29

MutationAssessor

Uncertain

2.8

.;M;M

PrimateAI

Pathogenic

0.85

PROVEAN

Pathogenic

-4.5

.;D;D

REVEL

Uncertain

0.38

Sift

Pathogenic

0.0

.;D;D

Sift4G

Pathogenic

0.0010

D;D;D

Polyphen

0.98

.;.;D

Vest4

0.81

MVP

0.54

MPC

0.77

ClinPred

0.24

GERP RS

4.6

Varity_R

0.44

gMVP

0.89

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

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