12-2053575-AAT-A
Variant summary
Our verdict is Uncertain significance. Variant got 4 ACMG points: 8P and 4B. PVS1BS2
The NM_000719.7(CACNA1C):c.15_16delTA(p.Thr6GlufsTer35) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000181 in 1,600,686 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Consequence
NM_000719.7 frameshift
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 4 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
CACNA1C | NM_000719.7 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 47 | ENST00000399655.6 | NP_000710.5 | |
CACNA1C | NM_001167623.2 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 47 | ENST00000399603.6 | NP_001161095.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
CACNA1C | ENST00000399603.6 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 47 | 5 | NM_001167623.2 | ENSP00000382512.1 | ||
CACNA1C | ENST00000399655.6 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 47 | 1 | NM_000719.7 | ENSP00000382563.1 | ||
CACNA1C | ENST00000406454.8 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 48 | 5 | ENSP00000385896.3 | |||
CACNA1C | ENST00000399634.6 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 47 | 5 | ENSP00000382542.2 | |||
CACNA1C | ENST00000347598.9 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 49 | 1 | ENSP00000266376.6 | |||
CACNA1C | ENST00000344100.7 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 47 | 1 | ENSP00000341092.3 | |||
CACNA1C | ENST00000327702.12 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 48 | 1 | ENSP00000329877.7 | |||
CACNA1C | ENST00000399617.6 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 48 | 5 | ENSP00000382526.1 | |||
CACNA1C | ENST00000399638.5 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 48 | 1 | ENSP00000382547.1 | |||
CACNA1C | ENST00000335762.10 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 48 | 5 | ENSP00000336982.5 | |||
CACNA1C | ENST00000399606.5 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 48 | 1 | ENSP00000382515.1 | |||
CACNA1C | ENST00000399621.5 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 47 | 1 | ENSP00000382530.1 | |||
CACNA1C | ENST00000399637.5 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 47 | 1 | ENSP00000382546.1 | |||
CACNA1C | ENST00000402845.7 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 47 | 1 | ENSP00000385724.3 | |||
CACNA1C | ENST00000399629.5 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 47 | 1 | ENSP00000382537.1 | |||
CACNA1C | ENST00000682336.1 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 47 | ENSP00000507898.1 | ||||
CACNA1C | ENST00000399591.5 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 46 | 1 | ENSP00000382500.1 | |||
CACNA1C | ENST00000399595.5 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 46 | 1 | ENSP00000382504.1 | |||
CACNA1C | ENST00000399649.5 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 46 | 1 | ENSP00000382557.1 | |||
CACNA1C | ENST00000399597.5 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 47 | 1 | ENSP00000382506.1 | |||
CACNA1C | ENST00000399601.5 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 47 | 1 | ENSP00000382510.1 | |||
CACNA1C | ENST00000399641.6 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 47 | 1 | ENSP00000382549.1 | |||
CACNA1C | ENST00000399644.5 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 47 | 1 | ENSP00000382552.1 | |||
CACNA1C | ENST00000682835.1 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 47 | ENSP00000507282.1 | ||||
CACNA1C | ENST00000683482.1 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 47 | ENSP00000507169.1 | ||||
CACNA1C | ENST00000682686.1 | c.15_16delTA | p.Thr6GlufsTer35 | frameshift_variant | Exon 1 of 46 | ENSP00000507309.1 | ||||
CACNA1C | ENST00000682544.1 | c.140-61647_140-61646delTA | intron_variant | Intron 1 of 49 | ENSP00000507184.1 | |||||
CACNA1C | ENST00000683824.1 | c.140-61647_140-61646delTA | intron_variant | Intron 1 of 47 | ENSP00000507867.1 | |||||
CACNA1C | ENST00000682462.1 | c.140-61647_140-61646delTA | intron_variant | Intron 1 of 46 | ENSP00000507105.1 | |||||
CACNA1C | ENST00000683781.1 | c.140-61647_140-61646delTA | intron_variant | Intron 1 of 46 | ENSP00000507434.1 | |||||
CACNA1C | ENST00000683840.1 | c.140-61647_140-61646delTA | intron_variant | Intron 1 of 46 | ENSP00000507612.1 | |||||
CACNA1C | ENST00000683956.1 | c.140-61647_140-61646delTA | intron_variant | Intron 1 of 46 | ENSP00000506882.1 | |||||
CACNA1C | ENST00000480911.6 | n.15_16delTA | non_coding_transcript_exon_variant | Exon 1 of 27 | 5 | ENSP00000437936.2 |
Frequencies
GnomAD3 genomes AF: 0.0000132 AC: 2AN: 152036Hom.: 0 Cov.: 31
GnomAD3 exomes AF: 0.00000883 AC: 2AN: 226604Hom.: 0 AF XY: 0.00000815 AC XY: 1AN XY: 122720
GnomAD4 exome AF: 0.0000186 AC: 27AN: 1448650Hom.: 0 AF XY: 0.0000139 AC XY: 10AN XY: 719244
GnomAD4 genome AF: 0.0000132 AC: 2AN: 152036Hom.: 0 Cov.: 31 AF XY: 0.0000135 AC XY: 1AN XY: 74274
ClinVar
Submissions by phenotype
CACNA1C-related disorder Pathogenic:1
The CACNA1C c.15_16delTA variant is predicted to result in a frameshift and premature protein termination (p.Thr6Glufs*35). This variant was reported in an individual with atrial fibrillation (Yoneda et al 2021. PubMed ID: 34495297). This variant is reported in 0.0026% of alleles in individuals of European (Non-Finnish) descent in gnomAD. Frameshift variants in CACNA1C are expected to be pathogenic. This variant is interpreted as likely pathogenic. -
not provided Pathogenic:1
Identified in an individual from a cohort with early onset atrial fibrillation in published literature (PMID: 34495297); Frameshift variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss of function is a known mechanism of disease; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 34495297) -
Timothy syndrome;C2678478:Brugada syndrome 3;CN260585:Long qt syndrome 8 Uncertain:1
- -
Long QT syndrome Uncertain:1
This sequence change creates a premature translational stop signal (p.Thr6Glufs*35) in the CACNA1C gene. It is expected to result in an absent or disrupted protein product. However, the current clinical and genetic evidence is not sufficient to establish whether loss-of-function variants in CACNA1C cause disease. This variant is present in population databases (rs786205782, gnomAD 0.003%). This premature translational stop signal has been observed in individual(s) with atrial fibrillation (PMID: 34495297). ClinVar contains an entry for this variant (Variation ID: 190711). 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 Uncertain:1
The c.15_16delTA variant, located in coding exon 1 of the CACNA1C gene, results from a deletion of two nucleotides at nucleotide positions 15 to 16, causing a translational frameshift with a predicted alternate stop codon (p.T6Efs*35). The predicted stop codon occurs in the 5’ end of theCACNA1C gene. Premature termination codons in the 5’ end of a gene have been reported to escape nonsense-mediated mRNAdecay and/or lead to re-initiation (Rivas et al. Science. 2015 May 8;348(6235):666-9; Lindeboom et al. Nat Genet. 2016 Oct;48(10):1112-8; Rhee et al. Sci Rep. 2017 May 10;7(1):1653). The exact functional effect of this alteration is unknown. According to data from gnomAD, the frequency for this variant is above the maximum credible frequency for a cardiac disease-causing variant in this gene based on internally established thresholds (Karczewski et al. Nature. 2020 May;581(7809):434-443; Whiffin et al. Genet Med. 2017 10;19:1151-1158). Based on the supporting evidence, the association of this alteration with CACNA1C-related neurodevelopmental disorder is unknown; however, the association with CACNA1C-related long QT syndrome or Timothy syndrome is unlikely. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at