rs11670018

Variant names:

• chr19-13373100-T-C
• rs11670018
• NM_001127222.2:c.540-1321A>G

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_001127222.2(CACNA1A):​c.540-1321A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.293 in 152,174 control chromosomes in the GnomAD database, including 6,790 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.29 (6790 hom., cov: 33)
• Consequence: CACNA1A NM_001127222.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.389
• Publications: 4 publications found

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: Labcorp Genetics (formerly Invitae), Ambry Genetics, Genomics England PanelApp, Orphanet
• undetermined early-onset epileptic encephalopathy

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Illumina, Orphanet
• developmental and epileptic encephalopathy, 42

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
• migraine, familial hemiplegic, 1

  Inheritance: AD Classification: STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
• spinocerebellar ataxia type 6

  Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Ambry Genetics
• 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

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.93).
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.312 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001127222.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNA1A	NM_001127222.2	MANE Select	c.540-1321A>G		intron	N/A	NP_001120694.1	O00555-8
	CACNA1A	NM_001127221.2	MANE Plus Clinical	c.540-1321A>G		intron	N/A	NP_001120693.1	O00555-3
	CACNA1A	NM_023035.3		c.540-1321A>G		intron	N/A	NP_075461.2	A0A087WW63

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNA1A	ENST00000360228.11	TSL:1 MANE Select	c.540-1321A>G		intron	N/A	ENSP00000353362.5	O00555-8
	CACNA1A	ENST00000638009.2	TSL:1 MANE Plus Clinical	c.540-1321A>G		intron	N/A	ENSP00000489913.1	O00555-3
	CACNA1A	ENST00000638029.1	TSL:5	c.540-1321A>G		intron	N/A	ENSP00000489829.1	A0A087WW63

Frequencies

GnomAD3 genomes AF: 0.293 AC: 44575 AN: 152056 Hom.: 6781 Cov.: 33

Gnomad AFR AF: 0.301

Gnomad AMI AF: 0.464

Gnomad AMR AF: 0.260

Gnomad ASJ AF: 0.333

Gnomad EAS AF: 0.130

Gnomad SAS AF: 0.133

Gnomad FIN AF: 0.281

Gnomad MID AF: 0.329

Gnomad NFE AF: 0.316

Gnomad OTH AF: 0.319

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.293 AC: 44606 AN: 152174 Hom.: 6790 Cov.: 33 AF XY: 0.288 AC XY: 21461 AN XY: 74404

African (AFR) AF: 0.301 AC: 12498 AN: 41492

American (AMR) AF: 0.260 AC: 3981 AN: 15296

Ashkenazi Jewish (ASJ) AF: 0.333 AC: 1155 AN: 3470

East Asian (EAS) AF: 0.130 AC: 675 AN: 5186

South Asian (SAS) AF: 0.133 AC: 643 AN: 4828

European-Finnish (FIN) AF: 0.281 AC: 2975 AN: 10572

Middle Eastern (MID) AF: 0.340 AC: 100 AN: 294

European-Non Finnish (NFE) AF: 0.316 AC: 21488 AN: 68008

Other (OTH) AF: 0.316 AC: 668 AN: 2116

Alfa AF: 0.294 Hom.: 2414

Bravo AF: 0.299

Asia WGS AF: 0.155 AC: 540 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.93
CADD	Benign	0.69
DANN	Benign	0.82
PhyloP100		-0.39
Mutation Taster		=100/0	polymorphism (auto)

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

Other links and lift over

dbSNP: rs11670018; hg19: chr19-13483914;