rs957128342
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Variant summary
Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PP3_Moderate
The NM_001103.4(ACTN2):āc.1418A>Gā(p.Tyr473Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000434 in 1,613,836 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (ā ā ).
Frequency
Genomes: š 0.000026 ( 0 hom., cov: 32)
Exomes š: 0.0000021 ( 0 hom. )
Consequence
ACTN2
NM_001103.4 missense
NM_001103.4 missense
Scores
12
5
2
Clinical Significance
Conservation
PhyloP100: 7.43
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]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 2 ACMG points.
PP3
MetaRNN computational evidence supports a deleterious effect, 0.849
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
ACTN2 | NM_001103.4 | c.1418A>G | p.Tyr473Cys | missense_variant | 13/21 | ENST00000366578.6 | |
ACTN2 | NM_001278343.2 | c.1418A>G | p.Tyr473Cys | missense_variant | 13/21 | ||
ACTN2 | NR_184402.1 | n.1790A>G | non_coding_transcript_exon_variant | 15/23 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
ACTN2 | ENST00000366578.6 | c.1418A>G | p.Tyr473Cys | missense_variant | 13/21 | 1 | NM_001103.4 | A1 |
Frequencies
GnomAD3 genomes AF: 0.0000263 AC: 4AN: 152242Hom.: 0 Cov.: 32
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GnomAD4 exome AF: 0.00000205 AC: 3AN: 1461594Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1AN XY: 727120
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GnomAD4 genome AF: 0.0000263 AC: 4AN: 152242Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1AN XY: 74372
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Primary familial hypertrophic cardiomyopathy;C2677338:Dilated cardiomyopathy 1AA Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Aug 28, 2021 | This sequence change replaces tyrosine with cysteine at codon 473 of the ACTN2 protein (p.Tyr473Cys). The tyrosine residue is highly conserved and there is a large physicochemical difference between tyrosine and cysteine. This variant is not present in population databases (ExAC no frequency). This missense change has been observed in individual(s) with arrhythmogenic cardiomyopathy (PMID: 31956495). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 581892). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt ACTN2 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. - |
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Aug 05, 2021 | Not observed in large population cohorts (Lek et al., 2016); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Reported in ClinVar as a variant of uncertain significance (ClinVar Variant ID# 581892; Landrum et al., 2016); This variant is associated with the following publications: (PMID: 31956495, 32670084, 32824180, 26582918) - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
CADD
Uncertain
DANN
Uncertain
DEOGEN2
Uncertain
.;.;D
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
LIST_S2
Pathogenic
D;D;D
M_CAP
Benign
D
MetaRNN
Pathogenic
D;D;D
MetaSVM
Uncertain
D
MutationAssessor
Pathogenic
.;H;H
MutationTaster
Benign
D;D;D
PrimateAI
Pathogenic
D
PROVEAN
Pathogenic
.;D;D
REVEL
Pathogenic
Sift
Uncertain
.;D;D
Sift4G
Uncertain
D;D;D
Polyphen
1.0
.;.;D
Vest4
MutPred
0.64
.;Loss of phosphorylation at Y473 (P = 0.0716);Loss of phosphorylation at Y473 (P = 0.0716);
MVP
MPC
0.90
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at