19-13365447-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -17 ACMG points: 0P and 17B. BP4_StrongBP6_Very_StrongBP7BS2

The NM_001127222.2(CACNA1A):c.654G>A(p.Ser218Ser) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000682 in 1,613,736 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 Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. S218S) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000068 ( 0 hom. )

Consequence

CACNA1A
NM_001127222.2 synonymous

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: -0.525

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -17 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.55).

BP6

Variant 19-13365447-C-T is Benign according to our data. Variant chr19-13365447-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 476272.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-0.525 with no splicing effect.

BS2

High AC in GnomAdExome4 at 10 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CACNA1A	NM_001127222.2 link	c.654G>A	p.Ser218Ser	synonymous_variant	Exon 5 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.654G>A	p.Ser218Ser	synonymous_variant	Exon 5 of 47	1	NM_001127222.2	ENSP00000353362.5	O00555-8
CACNA1A	ENST00000638029.1 link	c.654G>A	p.Ser218Ser	synonymous_variant	Exon 5 of 48	5		ENSP00000489829.1	A0A087WW63
CACNA1A	ENST00000573710.7 link	c.654G>A	p.Ser218Ser	synonymous_variant	Exon 5 of 47	5		ENSP00000460092.3	A0A1C7CYY9
CACNA1A	ENST00000635727.1 link	c.654G>A	p.Ser218Ser	synonymous_variant	Exon 5 of 47	5		ENSP00000490001.1	A0A1B0GU81
CACNA1A	ENST00000637769.1 link	c.654G>A	p.Ser218Ser	synonymous_variant	Exon 5 of 47	1		ENSP00000489778.1	A0A1B0GTN7
CACNA1A	ENST00000636012.1 link	c.654G>A	p.Ser218Ser	synonymous_variant	Exon 5 of 46	5		ENSP00000490223.1	A0A1B0GUS3
CACNA1A	ENST00000637736.1 link	c.513G>A	p.Ser171Ser	synonymous_variant	Exon 4 of 46	5		ENSP00000489861.1	A0A1B0GTW2
CACNA1A	ENST00000636389.1 link	c.654G>A	p.Ser218Ser	synonymous_variant	Exon 5 of 47	5		ENSP00000489992.1	A0A1B0GU74
CACNA1A	ENST00000637432.1 link	c.654G>A	p.Ser218Ser	synonymous_variant	Exon 5 of 48	5		ENSP00000490617.1	O00555-2
CACNA1A	ENST00000636549.1 link	c.654G>A	p.Ser218Ser	synonymous_variant	Exon 5 of 48	5		ENSP00000490578.1	B5TYJ1
CACNA1A	ENST00000637927.1 link	c.654G>A	p.Ser218Ser	synonymous_variant	Exon 5 of 47	5		ENSP00000489715.1	A0A1B0GTI4
CACNA1A	ENST00000635895.1 link	c.654G>A	p.Ser218Ser	synonymous_variant	Exon 5 of 47	5		ENSP00000490323.1	A0A384DVW2
CACNA1A	ENST00000638009.2 link	c.654G>A	p.Ser218Ser	synonymous_variant	Exon 5 of 47	1		ENSP00000489913.1	O00555-3
CACNA1A	ENST00000637276.1 link	c.654G>A	p.Ser218Ser	synonymous_variant	Exon 5 of 46	5		ENSP00000489777.1	O00555-5

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

152080

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.00

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000121

AC:

AN:

248928

Hom.:

AF XY:

0.00000740

AC XY:

AN XY:

135090

show subpopulations

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000266

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000684

AC:

AN:

1461538

Hom.:

Cov.:

AF XY:

0.00000688

AC XY:

AN XY:

727058

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000899

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152198

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74404

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000473

Bravo

AF:

0.0000151

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:1

Oct 16, 2020

Athena Diagnostics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Episodic ataxia type 2;C4310716:Developmental and epileptic encephalopathy, 42

Benign:1

Oct 04, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.55

CADD

Benign

7.6

DANN

Benign

0.68

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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