rs1555773757
Variant summary
Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM1PM2PP2PP3_Moderate
The NM_001127222.2(CACNA1A):c.851G>T(p.Gly284Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).
Frequency
Genomes: not found (cov: 32)
Exomes 𝑓: 0.0 ( 0 hom. )
Failed GnomAD Quality Control
Consequence
CACNA1A
NM_001127222.2 missense
NM_001127222.2 missense
Scores
8
4
2
Clinical Significance
Conservation
PhyloP100: 3.24
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 Likely_pathogenic. Variant got 7 ACMG points.
PM1
?
In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 6 uncertain in NM_001127222.2
PM2
?
Very rare variant in population databases, with high coverage;
PP2
?
Missense variant where missense usually causes diseases, CACNA1A
PP3
?
MetaRNN computational evidence supports a deleterious effect, 0.874
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
CACNA1A | NM_001127222.2 | c.851G>T | p.Gly284Val | missense_variant | 6/47 | ENST00000360228.11 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
CACNA1A | ENST00000360228.11 | c.851G>T | p.Gly284Val | missense_variant | 6/47 | 1 | NM_001127222.2 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 genomes
?
Cov.:
32
GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0AN: 1425388Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0AN XY: 705404
GnomAD4 exome
Data not reliable, filtered out with message: AC0
AF:
AC:
0
AN:
1425388
Hom.:
Cov.:
31
AF XY:
AC XY:
0
AN XY:
705404
Gnomad4 AFR exome
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GnomAD4 genome ? Cov.: 32
GnomAD4 genome
?
Cov.:
32
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:2
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Episodic ataxia type 2 Uncertain:1
Uncertain significance, criteria provided, single submitter | research | HudsonAlpha Institute for Biotechnology, HudsonAlpha Institute for Biotechnology | Apr 16, 2018 | - - |
Developmental and epileptic encephalopathy, 42 Uncertain:1
Uncertain significance, criteria provided, single submitter | research | HudsonAlpha Institute for Biotechnology, HudsonAlpha Institute for Biotechnology | Aug 09, 2021 | ACMG codes:PM2, PP3 - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
Cadd
Uncertain
Dann
Uncertain
Eigen
Pathogenic
Eigen_PC
Uncertain
FATHMM_MKL
Pathogenic
D
LIST_S2
Uncertain
D;D;D;D;D;D;D;D;.;D;D;D;D;D;D
M_CAP
Pathogenic
D
MetaRNN
Pathogenic
D;D;D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM
Pathogenic
D
MutationTaster
Benign
D;D;D
PrimateAI
Uncertain
T
Sift4G
Benign
T;T;.;.;.;.;.;.;.;.;.;D;.;.;.
Polyphen
0.99
.;D;.;.;.;.;.;.;.;.;.;.;.;.;.
Vest4
MutPred
Loss of disorder (P = 0.0311);Loss of disorder (P = 0.0311);Loss of disorder (P = 0.0311);Loss of disorder (P = 0.0311);Loss of disorder (P = 0.0311);.;Loss of disorder (P = 0.0311);Loss of disorder (P = 0.0311);Loss of disorder (P = 0.0311);Loss of disorder (P = 0.0311);Loss of disorder (P = 0.0311);Loss of disorder (P = 0.0311);Loss of disorder (P = 0.0311);Loss of disorder (P = 0.0311);Loss of disorder (P = 0.0311);
MVP
MPC
2.5
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at