rs754657888
Variant summary
Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate
The NM_014391.3(ANKRD1):c.881A>G(p.His294Arg) variant causes a missense change. The variant allele was found at a frequency of 0.0000211 in 1,613,980 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).
Frequency
Consequence
NM_014391.3 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 0 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
ANKRD1 | NM_014391.3 | c.881A>G | p.His294Arg | missense_variant | Exon 9 of 9 | ENST00000371697.4 | NP_055206.2 |
Ensembl
Frequencies
GnomAD3 genomes AF: 0.0000328 AC: 5AN: 152218Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.0000200 AC: 5AN: 249380Hom.: 0 AF XY: 0.0000296 AC XY: 4AN XY: 134942
GnomAD4 exome AF: 0.0000198 AC: 29AN: 1461762Hom.: 0 Cov.: 31 AF XY: 0.0000275 AC XY: 20AN XY: 727178
GnomAD4 genome AF: 0.0000328 AC: 5AN: 152218Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2AN XY: 74358
ClinVar
Submissions by phenotype
not provided Uncertain:2
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The His294Arg variant in the ANKRD1 gene has not been reported as a disease-causing mutation or as a benign polymorphism to our knowledge. His294Arg results in a conservative amino acid substitution of one positively-charged amino acid for another at a position that is not highly conserved across species. Multiple in silico analysis programs predict His294Arg has a benign effect on the protein structure/function. In addition, there have been no nearby mutations reported in association with cardiomyopathy, indicating this region of the protein may be tolerant of change. However, the His294Arg variant was not observed in approximately 6000 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. With the clinical and molecular information available at this time, we cannot definitively determine if His294Arg in the ANKRD1 gene is a disease-causing mutation or a rare benign variant. The variant is found in DCM panel(s). -
ANKRD1-related dilated cardiomyopathy Uncertain:1
This sequence change replaces histidine, which is basic and polar, with arginine, which is basic and polar, at codon 294 of the ANKRD1 protein (p.His294Arg). This variant is present in population databases (rs754657888, gnomAD 0.005%). This variant has not been reported in the literature in individuals affected with ANKRD1-related conditions. ClinVar contains an entry for this variant (Variation ID: 201668). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt ANKRD1 protein function with a negative predictive value of 80%. 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. -
Primary dilated cardiomyopathy Uncertain:1
This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -
Cardiovascular phenotype Uncertain:1
The p.H294R variant (also known as c.881A>G), located in coding exon 9 of the ANKRD1 gene, results from an A to G substitution at nucleotide position 881. The histidine at codon 294 is replaced by arginine, an amino acid with highly similar properties. This amino acid position is not well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at