rs150808807
Variant summary
Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBP6BS2
The NM_001148.6(ANK2):āc.11354A>Gā(p.Gln3785Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000551 in 1,614,050 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Consequence
NM_001148.6 missense
Scores
Clinical Significance
Conservation
Publications
- complex neurodevelopmental disorderInheritance: AD Classification: DEFINITIVE, MODERATE Submitted by: Ambry Genetics, ClinGen
- Brugada syndromeInheritance: AD Classification: LIMITED, NO_KNOWN Submitted by: Genomics England PanelApp, ClinGen
- catecholaminergic polymorphic ventricular tachycardiaInheritance: AD Classification: LIMITED, NO_KNOWN Submitted by: ClinGen, Genomics England PanelApp
- heart conduction diseaseInheritance: AD Classification: LIMITED Submitted by: Genomics England PanelApp
- neurodevelopmental disorderInheritance: AD Classification: LIMITED Submitted by: G2P
- cardiac arrhythmia, ankyrin-B-relatedInheritance: Unknown, AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
- long QT syndromeInheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
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ACMG classification
Our verdict: Benign. The variant received -9 ACMG points.
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|
| ANK2 | NM_001148.6 | c.11354A>G | p.Gln3785Arg | missense_variant | Exon 43 of 46 | ENST00000357077.9 | NP_001139.3 |
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
|---|---|---|---|---|---|---|---|---|---|---|
| ANK2 | ENST00000357077.9 | c.11354A>G | p.Gln3785Arg | missense_variant | Exon 43 of 46 | 1 | NM_001148.6 | ENSP00000349588.4 |
Frequencies
GnomAD3 genomes AF: 0.0000526 AC: 8AN: 152234Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.0000359 AC: 9AN: 251000 AF XY: 0.00000737 show subpopulations
GnomAD4 exome AF: 0.0000554 AC: 81AN: 1461816Hom.: 4 Cov.: 31 AF XY: 0.0000413 AC XY: 30AN XY: 727222 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.0000526 AC: 8AN: 152234Hom.: 0 Cov.: 32 AF XY: 0.0000403 AC XY: 3AN XY: 74382 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
not provided Uncertain:2Benign:1
See Variant Classification Assertion Criteria. -
ANK2, Exon 43, c.11354A>G (p.Gln3785Arg), heterozygous, Uncertain Significance Given the lack of case data and the frequency in gnomAD, we consider this variant a variant of uncertain significance, probably benign and we do not feel it is suitable for assessing risk in healthy relatives ("predictive genetic testing"). Per the lab report this variant has not been reported in association with disease. This variant is listed in ClinVar and is also classified as a VUS by Ambry and GeneDx. Per the information in ClinVar from GeneDx, this variant has been in seen in conjunction with other pathogenic variants in individuals with an unspecified arrhythmia or Long QT syndrome. GeneDx has also seen it in the homozygous state in one individual with Long QT syndrome or another unspecified arrhythmia. No segregation data. The variant was reported online in 8 of 138,365 individuals in the Genome Aggregation Consortium Dataset (gnomAD; http://gnomad.broadinstitute.org/), which currently includes variant calls on >140,000 unrelated individuals of African, Asian, European, Ashkenazi, Latino descent. Specifically, the variant was observed in East Asians, Africans, and Latinos with the highest MAF in East Asians (6 of 9421 individuals (MAF=0.03184%). The phenotype of those individuals is not publicly available. The dataset is comprised of multiple cohorts, some of which were recruited from the general population, others were enriched for common cardiovascular disease. -
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Cardiac arrhythmia, ankyrin-B-related Uncertain:2
The p.Gln3785Arg variant in the ANK2 gene has been previously reported in 1 individual with a QTc interval of 464ms (Ghouse et al., 2015). This variant has also been identified in 6/19,922 East Asian chromosomes by the Genome Aggregation Database (http://gnomad.broadinstitute.org/). Computational tools predict that the p.Gln3785Arg variant does not impact protein function; however, the accuracy of in silico algorithms is limited. These data were assessed using the ACMG/AMP variant interpretation guidelines. In summary, the significance of the p.Gln3785Arg variant is uncertain. Additional information is needed to resolve the significance of this variant. [ACMG evidence codes used: none] -
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. -
not specified Uncertain:1
Variant summary: ANK2 c.11354A>G (p.Gln3785Arg) results in a conservative amino acid change in the encoded protein sequence. Algorithms developed to predict the effect of missense changes on protein structure and function all suggest that this variant is likely to be tolerated. The variant allele was found at a frequency of 3.6e-05 in 251000 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.11354A>G has been observed in at least one individual with a QTc interval value of 464ms (e.g. Ghouse_2015) These report(s) do not provide unequivocal conclusions about association of the variant with Long QT Syndrome. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication has been ascertained in the context of this evaluation (PMID: 26159999). ClinVar contains an entry for this variant (Variation ID: 190580). Based on the evidence outlined above, the variant was classified as uncertain significance. -
ANK2-related disorder Uncertain:1
The ANK2 c.11354A>G variant is predicted to result in the amino acid substitution p.Gln3785Arg. This variant has been reported in an individual with an apparently normal QTc interval (Table S3, Ghouse et al. 2015. PubMed ID: 26159999). This variant is reported in 0.030% of alleles in individuals of East Asian descent in gnomAD (http://gnomad.broadinstitute.org/variant/4-114290705-A-G). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -
Long QT syndrome Uncertain:1
This sequence change replaces glutamine, which is neutral and polar, with arginine, which is basic and polar, at codon 3785 of the ANK2 protein (p.Gln3785Arg). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This missense change has been observed in individual(s) with a normal QTc interval (PMID: 26159999). ClinVar contains an entry for this variant (Variation ID: 190580). An algorithm developed to predict the effect of missense changes on protein structure and function outputs the following: PolyPhen-2: "Benign". The arginine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect 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. -
Cardiovascular phenotype Benign:1
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:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at