19-13207365-G-T

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001127222.2(CACNA1A):c.7469C>A(p.Ser2490Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000285 in 1,401,822 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 (no stars).

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0000029 ( 0 hom. )

Consequence

CACNA1A
NM_001127222.2 missense

Scores

Clinical Significance

Uncertain significance no assertion criteria provided U:1

Conservation

PhyloP100: 2.18

Publications

0 publications found

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]

CACNA1A Gene-Disease associations (from GenCC):

episodic ataxia type 2
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
undetermined early-onset epileptic encephalopathy
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, Illumina
developmental and epileptic encephalopathy, 42
Inheritance: AD Classification: STRONG, MODERATE Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
migraine, familial hemiplegic, 1
Inheritance: AD Classification: STRONG Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
spinocerebellar ataxia type 6
Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Orphanet
benign paroxysmal torticollis of infancy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
familial or sporadic hemiplegic migraine
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Lennox-Gastaut syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

CACNA1A links:

ENSG00000300728 (HGNC:):

ENSG00000300728 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.2487731).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CACNA1A	NM_001127222.2 link	c.7469C>A	p.Ser2490Tyr	missense_variant	Exon 47 of 47	ENST00000360228.11	NP_001120694.1	O00555-8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CACNA1A	ENST00000360228.11 link	c.7469C>A	p.Ser2490Tyr	missense_variant	Exon 47 of 47	1	NM_001127222.2	ENSP00000353362.5	O00555-8
CACNA1A	ENST00000638029.1 link	c.7487C>A	p.Ser2496Tyr	missense_variant	Exon 48 of 48	5		ENSP00000489829.1	A0A087WW63
CACNA1A	ENST00000573710.7 link	c.7475C>A	p.Ser2492Tyr	missense_variant	Exon 47 of 47	5		ENSP00000460092.3	A0A1C7CYY9
CACNA1A	ENST00000635727.1 link	c.7472C>A	p.Ser2491Tyr	missense_variant	Exon 47 of 47	5		ENSP00000490001.1	A0A1B0GU81
CACNA1A	ENST00000637769.1 link	c.7472C>A	p.Ser2491Tyr	missense_variant	Exon 47 of 47	1		ENSP00000489778.1	A0A1B0GTN7
CACNA1A	ENST00000636012.1 link	c.7436C>A	p.Ser2479Tyr	missense_variant	Exon 46 of 46	5		ENSP00000490223.1	A0A1B0GUS3
CACNA1A	ENST00000637736.1 link	c.7331C>A	p.Ser2444Tyr	missense_variant	Exon 46 of 46	5		ENSP00000489861.1	A0A1B0GTW2
CACNA1A	ENST00000636768.2 link	n.*1730C>A		non_coding_transcript_exon_variant	Exon 45 of 45	5		ENSP00000490190.2	A0A1B0GUP3
CACNA1A	ENST00000713789.1 link	n.*2648C>A		non_coding_transcript_exon_variant	Exon 47 of 47			ENSP00000519091.1
CACNA1A	ENST00000636389.1 link	c.*555C>A		3_prime_UTR_variant	Exon 47 of 47	5		ENSP00000489992.1	A0A1B0GU74
CACNA1A	ENST00000637432.1 link	c.*681C>A		3_prime_UTR_variant	Exon 48 of 48	5		ENSP00000490617.1	O00555-2
CACNA1A	ENST00000635895.1 link	c.*681C>A		3_prime_UTR_variant	Exon 47 of 47	5		ENSP00000490323.1	A0A384DVW2
CACNA1A	ENST00000638009.2 link	c.*681C>A		3_prime_UTR_variant	Exon 47 of 47	1		ENSP00000489913.1	O00555-3
CACNA1A	ENST00000636768.2 link	n.*1730C>A		3_prime_UTR_variant	Exon 45 of 45	5		ENSP00000490190.2	A0A1B0GUP3
CACNA1A	ENST00000713789.1 link	n.*2648C>A		3_prime_UTR_variant	Exon 47 of 47			ENSP00000519091.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00

AC:

AN:

159920

AF XY:

0.00

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000285

AC:

AN:

1401822

Hom.:

Cov.:

AF XY:

0.00000288

AC XY:

AN XY:

694692

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

31898

American (AMR)

AF:

0.00

AC:

AN:

38780

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25096

East Asian (EAS)

AF:

0.0000270

AC:

AN:

36972

South Asian (SAS)

AF:

0.00

AC:

AN:

81334

European-Finnish (FIN)

AF:

0.00

AC:

AN:

34926

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5690

European-Non Finnish (NFE)

AF:

0.00000276

AC:

AN:

1088878

Other (OTH)

AF:

0.00

AC:

AN:

58248

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.613

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ExAC

AF:

0.00000914

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

CACNA1A-related disorder

Uncertain:1

May 22, 2024

PreventionGenetics, part of Exact Sciences

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

The CACNA1A c.7469C>A variant is predicted to result in the amino acid substitution p.Ser2490Tyr. To our knowledge, this variant has not been reported in the literature or in a large population database, indicating this variant is rare. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.22

BayesDel_addAF

Uncertain

0.090

BayesDel_noAF

Benign

-0.11

CADD

Benign

(source)

DANN

Benign

0.95

DEOGEN2

Benign

0.031

.;.;T;.;.;T;.;T;.;.

Eigen

Benign

-0.23

Eigen_PC

Benign

-0.22

FATHMM_MKL

Uncertain

0.79

LIST_S2

Benign

0.85

T;T;T;T;T;T;.;D;T;T

M_CAP

Pathogenic

0.99

MetaRNN

Benign

0.25

T;T;T;T;T;T;T;T;T;T

MetaSVM

Uncertain

0.11

PhyloP100

2.2

PrimateAI

Pathogenic

0.91

PROVEAN

Benign

-1.7

.;N;.;.;.;.;.;.;.;.

REVEL

Uncertain

0.29

Sift

Uncertain

0.015

.;D;.;.;.;.;.;.;.;.

Sift4G

Uncertain

0.023

D;D;.;D;.;.;.;.;.;.

Vest4

0.14

MutPred

0.26

.;Loss of glycosylation at S2490 (P = 0.003);.;.;.;.;.;.;.;.;

MVP

0.84

MPC

0.89

ClinPred

0.47

GERP RS

2.0

Varity_R

0.070

gMVP

0.26

Mutation Taster

=85/15

polymorphism

(source)

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

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19-13207365-G-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over