rs751739709
Variant summary
Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PP3_ModerateBS2
The NM_014391.3(ANKRD1):c.460C>T(p.Arg154Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000161 in 1,612,728 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 (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R154Q) has been classified as Uncertain significance.
Frequency
Consequence
NM_014391.3 missense
Scores
Clinical Significance
Conservation
Publications
- familial isolated dilated cardiomyopathyInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
- dilated cardiomyopathyInheritance: AD Classification: LIMITED Submitted by: ClinGen
- hypertrophic cardiomyopathyInheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
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ACMG classification
Our verdict: Likely_benign. The variant received -2 ACMG points.
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|
| ANKRD1 | NM_014391.3 | c.460C>T | p.Arg154Trp | missense_variant | Exon 5 of 9 | ENST00000371697.4 | NP_055206.2 |
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
|---|---|---|---|---|---|---|---|---|---|---|
| ANKRD1 | ENST00000371697.4 | c.460C>T | p.Arg154Trp | missense_variant | Exon 5 of 9 | 1 | NM_014391.3 | ENSP00000360762.3 |
Frequencies
GnomAD3 genomes AF: 0.0000131 AC: 2AN: 152140Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.00000797 AC: 2AN: 250788 AF XY: 0.0000148 show subpopulations
GnomAD4 exome AF: 0.0000164 AC: 24AN: 1460588Hom.: 0 Cov.: 30 AF XY: 0.0000165 AC XY: 12AN XY: 726740 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.0000131 AC: 2AN: 152140Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1AN XY: 74326 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
not provided Uncertain:1
This infant with asymmetric LV hypertrophy had genetic testing for hypertrophic cardiomyopathy with the Invitae laboratory. The following genes were evaluated for sequence changes and exonic deletions/duplications: A2ML1, ABCC9, ACADVL, ACTC1, ACTN2, AGL, ALMS1, ANKRD1, BAG3, BRAF, CACNA1C, CALR3, CAV3, CBL, CHRM2, CPT2, CRYAB, CSRP3, CTF1, CTNNA3, DES, DMD, DNAJC19, DOLK, DSC2, DSG2, DSP, DTNA, ELAC2, EMD, EYA4, FHL1, FHL2, FKRP, FKTN, FLNC, GAA, GATA4, GATA6, GATAD1, GLA, HCN4, HRAS, ILK, JPH2, JUP, KRAS, LAMA4, LAMP2, LDB3, LMNA, LRRC10, MAP2K1, MAP2K2, MTO1, MYBPC3, MYH6, MYH7, MYL2, MYL3, MYLK2, MYOM1, MYOZ2, MYPN, NEBL, NEXN, NF1, NKX2-5, NPPA, NRAS, PDLIM3, PKP2, PLEKHM2, PLN, PRDM16, PRKAG2, PTPN11, RAF1, RASA1, RBM20, RIT1, RRAS, RYR2, SCN5A, SGCD, SHOC2, SLC22A5, SOS1, SOS2, SPRED1, TAZ, TCAP, TGFB3, TMEM43, TMEM70, TMPO, TNNC1, TNNI3, TNNT2, TPM1, TTN, TTR, TXNRD2, VCL The following genes were evaluated for sequence changes only: SDHA One variant was reported. p.Arg154Trp (c.460C>T) in exon 5 of the ANKRD1 gene (NM_014391.2) Chromosome location 10:92677581 G / A Based on the information reviewed below, we classify it as a Variant of Uncertain Significance (VUS), concluding that there is not sufficient evidence for its pathogenicity to warrant using it for predictive genetic testing. The ANKRD1 gene currently has no well-established disease association; however, there is preliminary evidence supporting a correlation with autosomal dominant dilated cardiomyopathy (DCM) (MedGen UID: 2880) and hypertrophic cardiomyopathy (HCM) (PMID: 19608031). This specific variant has not been reported in the literature in association with disease. This is a nonconservative amino acid change, resulting in the replacement of a positively-charged Arginine with a nonpolar Tryptophan. Arginine at this location is absolutely conserved across ~100 vertebrate species for which we have data. Nearby residues are also highly conserved. There are no Likely Pathogenic or Pathogenic variants listed in ClinVar within 10 amino acids to either side, although since this is a newly-characterized gene there are only 3 such variants listed total. According to the Invitae report, algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). It is present in gnomAD (a population database of 140,000 individuals not selected for cardiomyopathy) in 2 South Asian individuals, for an allele frequency in that ethnic group of 0.006%. Overall allele frequency among all ethnicities 0.0008%. There is also 1 non-Finnish European ancestry individual with a p.Arg154Gln variant. There is good sequencing coverage at this site. The gnomAD database includes variant calls on ~140,000 individuals of European, African, Latino, South Asian, Ashkenazi, and East Asian descent. 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. The curators made an effort to exclude individuals with severe pediatric diseases.
ANKRD1-related dilated cardiomyopathy Uncertain:1
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. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). ClinVar contains an entry for this variant (Variation ID: 477609). This variant has not been reported in the literature in individuals affected with ANKRD1-related conditions. This variant is present in population databases (rs751739709, gnomAD 0.006%). This sequence change replaces arginine, which is basic and polar, with tryptophan, which is neutral and slightly polar, at codon 154 of the ANKRD1 protein (p.Arg154Trp).
Cardiovascular phenotype Uncertain:1
The p.R154W variant (also known as c.460C>T), located in coding exon 5 of the ANKRD1 gene, results from a C to T substitution at nucleotide position 460. The arginine at codon 154 is replaced by tryptophan, an amino acid with dissimilar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. The evidence for this gene-disease relationship is limited; therefore, the clinical significance of this alteration is unclear.
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at