rs773966897
Positions:
Variant summary
Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong
The ENST00000348261.11(CACNA1H):c.2603+3G>A variant causes a splice donor region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000138 in 1,449,802 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).
Frequency
Genomes: not found (cov: 33)
Exomes 𝑓: 0.0000014 ( 0 hom. )
Consequence
CACNA1H
ENST00000348261.11 splice_donor_region, intron
ENST00000348261.11 splice_donor_region, intron
Scores
2
Splicing: ADA: 0.00006001
2
Clinical Significance
Conservation
PhyloP100: 0.570
Genes affected
CACNA1H (HGNC:1395): (calcium voltage-gated channel subunit alpha1 H) This gene encodes a T-type member of the alpha-1 subunit family, a protein in the voltage-dependent calcium channel complex. Calcium channels mediate the influx of calcium ions into the cell upon membrane polarization and consist of a complex of alpha-1, alpha-2/delta, beta, and gamma subunits in a 1:1:1:1 ratio. The alpha-1 subunit has 24 transmembrane segments and forms the pore through which ions pass into the cell. There are multiple isoforms of each of the proteins in the complex, either encoded by different genes or the result of alternative splicing of transcripts. Alternate transcriptional splice variants, encoding different isoforms, have been characterized for the gene described here. Studies suggest certain mutations in this gene lead to childhood absence epilepsy (CAE). [provided by RefSeq, Jul 2008]
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ACMG classification
Classification made for transcript
Verdict is Likely_benign. Variant got -2 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (BayesDel_noAF=-0.84).
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
CACNA1H | NM_021098.3 | c.2603+3G>A | splice_donor_region_variant, intron_variant | ENST00000348261.11 | NP_066921.2 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
CACNA1H | ENST00000348261.11 | c.2603+3G>A | splice_donor_region_variant, intron_variant | 1 | NM_021098.3 | ENSP00000334198 | P4 |
Frequencies
GnomAD3 genomes Cov.: 33
GnomAD3 genomes
Cov.:
33
GnomAD3 exomes AF: 0.00000815 AC: 2AN: 245410Hom.: 0 AF XY: 0.00 AC XY: 0AN XY: 133384
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GnomAD4 exome AF: 0.00000138 AC: 2AN: 1449802Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0AN XY: 719060
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GnomAD4 genome Cov.: 33
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33
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Idiopathic generalized epilepsy;C4310756:Hyperaldosteronism, familial, type IV Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Jan 15, 2024 | This sequence change falls in intron 11 of the CACNA1H gene. It does not directly change the encoded amino acid sequence of the CACNA1H protein. It affects a nucleotide within the consensus splice site. This variant is present in population databases (rs773966897, gnomAD 0.006%). This variant has not been reported in the literature in individuals affected with CACNA1H-related conditions. ClinVar contains an entry for this variant (Variation ID: 566036). Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant is not likely to affect RNA splicing. 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. - |
Computational scores
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Name
Calibrated prediction
Score
Prediction
BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
Splicing
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dbscSNV1_ADA
Benign
dbscSNV1_RF
Benign
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at