rs886037945

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PM1PM2PM5PP2PP3_ModeratePP5

The NM_001127222.2(CACNA1A):​c.2134G>T​(p.Ala712Ser) variant causes a missense change. 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 Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A712T) has been classified as Pathogenic.

Frequency

Genomes: not found (cov: 29)

Consequence

CACNA1A
NM_001127222.2 missense

Scores

12
5
2

Clinical Significance

Pathogenic no assertion criteria provided P:1

Conservation

PhyloP100: 6.16
Variant links:
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 Pathogenic. Variant got 10 ACMG points.

PM1
In a transmembrane_region Helical; Name=S6 of repeat II (size 24) in uniprot entity CAC1A_HUMAN there are 4 pathogenic changes around while only 0 benign (100%) in NM_001127222.2
PM2
Very rare variant in population databases, with high coverage;
PM5
Other missense variant is known to change same aminoacid residue: Variant chr19-13303584-C-T is described in Lovd as [Pathogenic].
PP2
Missense variant in the CACNA1A gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 137 curated pathogenic missense variants (we use a threshold of 10). The gene has 132 curated benign missense variants. Gene score misZ: 5.7845 (above the threshold of 3.09). Trascript score misZ: 3.9354 (above the threshold of 3.09). GenCC associations: The gene is linked to benign paroxysmal torticollis of infancy, developmental and epileptic encephalopathy, 42, undetermined early-onset epileptic encephalopathy, episodic ataxia type 2, familial or sporadic hemiplegic migraine, spinocerebellar ataxia type 6, Lennox-Gastaut syndrome, migraine, familial hemiplegic, 1.
PP3
MetaRNN computational evidence supports a deleterious effect, 0.897
PP5
Variant 19-13303584-C-A is Pathogenic according to our data. Variant chr19-13303584-C-A is described in ClinVar as [Pathogenic]. Clinvar id is 997449.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
CACNA1ANM_001127222.2 linkc.2134G>T p.Ala712Ser missense_variant Exon 17 of 47 ENST00000360228.11 NP_001120694.1 O00555-8

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
CACNA1AENST00000360228.11 linkc.2134G>T p.Ala712Ser missense_variant Exon 17 of 47 1 NM_001127222.2 ENSP00000353362.5 O00555-8
CACNA1AENST00000638029.1 linkc.2137G>T p.Ala713Ser missense_variant Exon 17 of 48 5 ENSP00000489829.1 A0A087WW63
CACNA1AENST00000573710.7 linkc.2140G>T p.Ala714Ser missense_variant Exon 17 of 47 5 ENSP00000460092.3 A0A1C7CYY9
CACNA1AENST00000635727.1 linkc.2137G>T p.Ala713Ser missense_variant Exon 17 of 47 5 ENSP00000490001.1 A0A1B0GU81
CACNA1AENST00000637769.1 linkc.2137G>T p.Ala713Ser missense_variant Exon 17 of 47 1 ENSP00000489778.1 A0A1B0GTN7
CACNA1AENST00000636012.1 linkc.2137G>T p.Ala713Ser missense_variant Exon 17 of 46 5 ENSP00000490223.1 A0A1B0GUS3
CACNA1AENST00000637736.1 linkc.1996G>T p.Ala666Ser missense_variant Exon 16 of 46 5 ENSP00000489861.1 A0A1B0GTW2
CACNA1AENST00000636389.1 linkc.2137G>T p.Ala713Ser missense_variant Exon 17 of 47 5 ENSP00000489992.1 A0A1B0GU74
CACNA1AENST00000637432.1 linkc.2137G>T p.Ala713Ser missense_variant Exon 17 of 48 5 ENSP00000490617.1 O00555-2
CACNA1AENST00000636549.1 linkc.2137G>T p.Ala713Ser missense_variant Exon 17 of 48 5 ENSP00000490578.1 B5TYJ1
CACNA1AENST00000637927.1 linkc.2140G>T p.Ala714Ser missense_variant Exon 17 of 47 5 ENSP00000489715.1 A0A1B0GTI4
CACNA1AENST00000635895.1 linkc.2137G>T p.Ala713Ser missense_variant Exon 17 of 47 5 ENSP00000490323.1 A0A384DVW2
CACNA1AENST00000638009.2 linkc.2137G>T p.Ala713Ser missense_variant Exon 17 of 47 1 ENSP00000489913.1 O00555-3
CACNA1AENST00000637276.1 linkc.2137G>T p.Ala713Ser missense_variant Exon 17 of 46 5 ENSP00000489777.1 O00555-5

Frequencies

GnomAD3 genomes
Cov.:
29
GnomAD4 exome
Cov.:
32
GnomAD4 genome
Cov.:
29

ClinVar

Significance: Pathogenic
Submissions summary: Pathogenic:1
Revision: no assertion criteria provided
LINK: link

Submissions by phenotype

Developmental and epileptic encephalopathy, 42 Pathogenic:1
Oct 13, 2020
Cytoplasmic Inheritance Laboratory, Institute of Genetics and Cytology
Significance: Pathogenic
Review Status: no assertion criteria provided
Collection Method: clinical testing

We consider the variant NM_001127221.2:c.2137G>T as disease-causing; it results in an amino acid substitution. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
0.66
BayesDel_addAF
Pathogenic
0.36
D
BayesDel_noAF
Pathogenic
0.29
CADD
Uncertain
25
DANN
Uncertain
0.99
DEOGEN2
Benign
0.31
.;.;T;.;.;.;.;.;.;T;.;.;.;T;.
Eigen
Pathogenic
0.91
Eigen_PC
Pathogenic
0.84
FATHMM_MKL
Pathogenic
0.99
D
LIST_S2
Uncertain
0.92
D;D;D;D;D;D;D;D;.;D;D;D;D;D;D
M_CAP
Pathogenic
0.74
D
MetaRNN
Pathogenic
0.90
D;D;D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM
Pathogenic
1.1
D
MutationAssessor
Pathogenic
3.3
.;.;.;.;M;.;.;M;.;.;.;.;M;.;.
PrimateAI
Pathogenic
0.92
D
PROVEAN
Uncertain
-2.8
.;D;.;.;.;.;.;.;.;.;.;.;.;.;.
REVEL
Pathogenic
0.92
Sift
Uncertain
0.0070
.;D;.;.;.;.;.;.;.;.;.;.;.;.;.
Sift4G
Uncertain
0.0030
D;D;.;.;.;.;.;.;.;.;.;.;.;.;.
Vest4
0.76
MutPred
0.60
Loss of helix (P = 0.2271);.;Loss of helix (P = 0.2271);Loss of helix (P = 0.2271);Loss of helix (P = 0.2271);.;Loss of helix (P = 0.2271);Loss of helix (P = 0.2271);Loss of helix (P = 0.2271);Loss of helix (P = 0.2271);Loss of helix (P = 0.2271);.;Loss of helix (P = 0.2271);.;Loss of helix (P = 0.2271);
MVP
0.93
MPC
2.2
ClinPred
1.0
D
GERP RS
5.0
Varity_R
0.48
gMVP
0.96

Splicing

Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
0.0
Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs886037945; hg19: chr19-13414398; API