chr19-13207393-C-T

Position:

chr19-13207393-C-T

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 1P and 6B. PP2BP4BS1_SupportingBS2

The NM_001127222.2(CACNA1A):c.7441G>A(p.Gly2481Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000312 in 1,540,300 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: 𝑓 0.000046 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000030 ( 0 hom. )

Consequence

CACNA1A
NM_001127222.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 1.55

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 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

PP2

Missense variant where missense usually causes diseases, CACNA1A

BP4

Computational evidence support a benign effect (MetaRNN=0.39236572).

BS1

Variant frequency is greater than expected in population amr. gnomad4_exome allele frequency = 0.0000295 (41/1388394) while in subpopulation AMR AF= 0.000517 (19/36768). AF 95% confidence interval is 0.000338. There are 0 homozygotes in gnomad4_exome. There are 19 alleles in male gnomad4_exome subpopulation. Median coverage is 30. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High AC in GnomAd4 at 7 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CACNA1A	NM_001127222.2 linkuse as main transcript	c.7441G>A	p.Gly2481Arg	missense_variant	47/47	ENST00000360228.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CACNA1A	ENST00000360228.11 linkuse as main transcript	c.7441G>A	p.Gly2481Arg	missense_variant	47/47	1	NM_001127222.2		O00555-8

Frequencies

GnomAD3 genomes

AF:

0.0000461

AC:

AN:

151798

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000394

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000140

AC:

AN:

143336

Hom.:

AF XY:

0.000113

AC XY:

AN XY:

79510

show subpopulations

Gnomad AFR exome

AF:

0.000156

Gnomad AMR exome

AF:

0.000628

Gnomad ASJ exome

AF:

0.000121

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000174

Gnomad OTH exome

AF:

0.000234

GnomAD4 exome

AF:

0.0000295

AC:

AN:

1388394

Hom.:

Cov.:

AF XY:

0.0000276

AC XY:

AN XY:

687294

show subpopulations

Gnomad4 AFR exome

AF:

0.0000321

Gnomad4 AMR exome

AF:

0.000517

Gnomad4 ASJ exome

AF:

0.0000804

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000249

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000129

Gnomad4 OTH exome

AF:

0.0000520

GnomAD4 genome

AF:

0.0000461

AC:

AN:

151906

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74292

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000393

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000416

ExAC

AF:

0.0000190

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

CeGaT Center for Human Genetics Tuebingen

Jul 01, 2024

CACNA1A: PP3 -

Spinocerebellar ataxia type 6;C1720416:Episodic ataxia type 2;C1832884:Migraine, familial hemiplegic, 1;C4310716:Developmental and epileptic encephalopathy, 42

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Sep 28, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.51

BayesDel_addAF

Benign

-0.096

BayesDel_noAF

Uncertain

-0.020

CADD

Pathogenic

DANN

Uncertain

0.99

Eigen

Benign

0.14

Eigen_PC

Benign

0.12

FATHMM_MKL

Benign

0.63

LIST_S2

Uncertain

0.86

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

M_CAP

Pathogenic

0.97

MetaRNN

Benign

0.39

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

MetaSVM

Uncertain

0.58

MutationTaster

Benign

0.86

D;D;D

PrimateAI

Pathogenic

0.94

Sift4G

Benign

0.12

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

Vest4

0.29

MutPred

0.35

.;Gain of MoRF binding (P = 0.0119);.;.;.;.;.;.;.;.;

MVP

0.88

MPC

1.0

ClinPred

0.12

GERP RS

3.1

Varity_R

0.20

gMVP

0.31

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.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over