rs16016
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Variant summary
Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BA1
The NM_001127222.2(CACNA1A):c.2091G>A(p.Thr697=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.141 in 1,608,958 control chromosomes in the GnomAD database, including 18,209 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).
Frequency
Genomes: 𝑓 0.13 ( 1447 hom., cov: 29)
Exomes 𝑓: 0.14 ( 16762 hom. )
Consequence
CACNA1A
NM_001127222.2 synonymous
NM_001127222.2 synonymous
Scores
2
Clinical Significance
Conservation
PhyloP100: -2.00
Genes affected
CACNA1A (HGNC:1388): (calcium voltage-gated channel subunit alpha1 A) Voltage-dependent calcium channels mediate the entry of calcium ions into excitable cells, and are also involved in a variety of calcium-dependent processes, including muscle contraction, hormone or neurotransmitter release, and gene expression. Calcium channels are multisubunit complexes composed of alpha-1, beta, alpha-2/delta, and gamma subunits. The channel activity is directed by the pore-forming alpha-1 subunit, whereas, the others act as auxiliary subunits regulating this activity. The distinctive properties of the calcium channel types are related primarily to the expression of a variety of alpha-1 isoforms, alpha-1A, B, C, D, E, and S. This gene encodes the alpha-1A subunit, which is predominantly expressed in neuronal tissue. Mutations in this gene are associated with 2 neurologic disorders, familial hemiplegic migraine and episodic ataxia 2. This gene also exhibits polymorphic variation due to (CAG)n-repeats. Multiple transcript variants encoding different isoforms have been found for this gene. In one set of transcript variants, the (CAG)n-repeats occur in the 3' UTR, and are not associated with any disease. But in another set of variants, an insertion extends the coding region to include the (CAG)n-repeats which encode a polyglutamine tract. Expansion of the (CAG)n-repeats from the normal 4-18 to 21-33 in the coding region is associated with spinocerebellar ataxia 6. [provided by RefSeq, Jul 2016]
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ACMG classification
Classification made for transcript
Verdict is Benign. Variant got -21 ACMG points.
BP4
?
Computational evidence support a benign effect (BayesDel_noAF=-0.84).
BP6
?
Variant 19-13303780-C-T is Benign according to our data. Variant chr19-13303780-C-T is described in ClinVar as [Benign]. Clinvar id is 128546.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr19-13303780-C-T is described in Lovd as [Benign]. Variant chr19-13303780-C-T is described in Lovd as [Likely_benign].
BP7
?
Synonymous conserved (PhyloP=-2 with no splicing effect.
BA1
?
GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.291 is higher than 0.05.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
CACNA1A | NM_001127222.2 | c.2091G>A | p.Thr697= | synonymous_variant | 16/47 | ENST00000360228.11 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
CACNA1A | ENST00000360228.11 | c.2091G>A | p.Thr697= | synonymous_variant | 16/47 | 1 | NM_001127222.2 |
Frequencies
GnomAD3 genomes ? AF: 0.127 AC: 19329AN: 151852Hom.: 1441 Cov.: 29
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GnomAD3 exomes AF: 0.165 AC: 41049AN: 249262Hom.: 3997 AF XY: 0.167 AC XY: 22603AN XY: 135228
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GnomAD4 exome AF: 0.143 AC: 207901AN: 1456986Hom.: 16762 Cov.: 31 AF XY: 0.146 AC XY: 105703AN XY: 725134
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GnomAD4 genome ? AF: 0.127 AC: 19358AN: 151972Hom.: 1447 Cov.: 29 AF XY: 0.130 AC XY: 9675AN XY: 74260
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ClinVar
Significance: Benign
Submissions summary: Benign:9
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
not specified Benign:7
Benign, no assertion criteria provided | clinical testing | Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center | - | - - |
Benign, criteria provided, single submitter | clinical testing | Athena Diagnostics | May 03, 2021 | - - |
Likely benign, no assertion criteria provided | clinical testing | Genetic Services Laboratory, University of Chicago | - | Likely benign based on allele frequency in 1000 Genomes Project or ESP global frequency and its presence in a patient with a rare or unrelated disease phenotype. NOT Sanger confirmed. - |
Benign, criteria provided, single submitter | clinical testing | GeneDx | Jan 08, 2016 | This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. - |
Benign, criteria provided, single submitter | clinical testing | Unidad de Genómica Garrahan, Hospital de Pediatría Garrahan | Jul 15, 2024 | This variant is classified as Benign based on local population frequency. This variant was detected in 38% of patients studied in a panel designed for Epileptic and Developmental Encephalopathy and Progressive Myoclonus Epilepsy. Number of patients: 35. Only high quality variants are reported. - |
Benign, criteria provided, single submitter | clinical testing | PreventionGenetics, part of Exact Sciences | - | - - |
Benign, no assertion criteria provided | clinical testing | Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+ | - | - - |
Episodic ataxia type 2;C4310716:Developmental and epileptic encephalopathy, 42 Benign:1
Benign, criteria provided, single submitter | clinical testing | Invitae | Feb 01, 2024 | - - |
Inborn genetic diseases Benign:1
Benign, criteria provided, single submitter | clinical testing | Ambry Genetics | Feb 09, 2016 | This alteration is classified as 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
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BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
Splicing
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Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at