19-13359708-T-C

Variant names:

• chr19-13359708-T-C
• rs16006
• NM_001127222.2:c.876A>G

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BA1

The NM_001127222.2(CACNA1A):​c.876A>G​(p.Glu292Glu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0461 in 1,571,678 control chromosomes in the GnomAD database, including 3,172 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.081 (834 hom., cov: 32)
  • Exomes 𝑓: 0.042 (2338 hom.)
• Consequence: CACNA1A NM_001127222.2 synonymous
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:9
• Conservation: PhyloP100: 0.0640
• Publications: 10 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: 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

ACMG classification

Our verdict: Benign. The variant received -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.52).
• BP6: Variant 19-13359708-T-C is Benign according to our data. Variant chr19-13359708-T-C is described in ClinVar as Benign. ClinVar VariationId is 128560.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=0.064 with no splicing effect.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.177 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CACNA1A	NM_001127222.2	c.876A>G	p.Glu292Glu	synonymous_variant	Exon 6 of 47	ENST00000360228.11	NP_001120694.1
CACNA1A	NM_001127221.2	c.876A>G	p.Glu292Glu	synonymous_variant	Exon 6 of 47	ENST00000638009.2	NP_001120693.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CACNA1A	ENST00000360228.11	c.876A>G	p.Glu292Glu	synonymous_variant	Exon 6 of 47	1	NM_001127222.2	ENSP00000353362.5
CACNA1A	ENST00000638009.2	c.876A>G	p.Glu292Glu	synonymous_variant	Exon 6 of 47	1	NM_001127221.2	ENSP00000489913.1
CACNA1A	ENST00000638029.1	c.876A>G	p.Glu292Glu	synonymous_variant	Exon 6 of 48	5		ENSP00000489829.1
CACNA1A	ENST00000573710.7	c.876A>G	p.Glu292Glu	synonymous_variant	Exon 6 of 47	5		ENSP00000460092.3
CACNA1A	ENST00000635727.1	c.876A>G	p.Glu292Glu	synonymous_variant	Exon 6 of 47	5		ENSP00000490001.1
CACNA1A	ENST00000637769.1	c.876A>G	p.Glu292Glu	synonymous_variant	Exon 6 of 47	1		ENSP00000489778.1
CACNA1A	ENST00000636012.1	c.876A>G	p.Glu292Glu	synonymous_variant	Exon 6 of 46	5		ENSP00000490223.1
CACNA1A	ENST00000637736.1	c.735A>G	p.Glu245Glu	synonymous_variant	Exon 5 of 46	5		ENSP00000489861.1
CACNA1A	ENST00000636389.1	c.876A>G	p.Glu292Glu	synonymous_variant	Exon 6 of 47	5		ENSP00000489992.1
CACNA1A	ENST00000637432.1	c.876A>G	p.Glu292Glu	synonymous_variant	Exon 6 of 48	5		ENSP00000490617.1
CACNA1A	ENST00000636549.1	c.876A>G	p.Glu292Glu	synonymous_variant	Exon 6 of 48	5		ENSP00000490578.1
CACNA1A	ENST00000637927.1	c.876A>G	p.Glu292Glu	synonymous_variant	Exon 6 of 47	5		ENSP00000489715.1
CACNA1A	ENST00000635895.1	c.876A>G	p.Glu292Glu	synonymous_variant	Exon 6 of 47	5		ENSP00000490323.1
CACNA1A	ENST00000637276.1	c.876A>G	p.Glu292Glu	synonymous_variant	Exon 6 of 46	5		ENSP00000489777.1
CACNA1A	ENST00000636768.2	n.876A>G		non_coding_transcript_exon_variant	Exon 6 of 45	5		ENSP00000490190.2
CACNA1A	ENST00000713789.1	n.876A>G		non_coding_transcript_exon_variant	Exon 6 of 47			ENSP00000519091.1

Frequencies

GnomAD3 genomes AF: 0.0808 AC: 12266 AN: 151832 Hom.: 828 Cov.: 32

Gnomad AFR AF: 0.181

Gnomad AMI AF: 0.0166

Gnomad AMR AF: 0.0397

Gnomad ASJ AF: 0.0584

Gnomad EAS AF: 0.153

Gnomad SAS AF: 0.115

Gnomad FIN AF: 0.0289

Gnomad MID AF: 0.0601

Gnomad NFE AF: 0.0319

Gnomad OTH AF: 0.0632

GnomAD2 exomes AF: 0.0606 AC: 13106 AN: 216358 AF XY: 0.0624

Gnomad AFR exome AF: 0.185

Gnomad AMR exome AF: 0.0262

Gnomad ASJ exome AF: 0.0650

Gnomad EAS exome AF: 0.157

Gnomad FIN exome AF: 0.0298

Gnomad NFE exome AF: 0.0324

Gnomad OTH exome AF: 0.0552

GnomAD4 exome AF: 0.0424 AC: 60213 AN: 1419730 Hom.: 2338 Cov.: 31 AF XY: 0.0443 AC XY: 31230 AN XY: 705108

African (AFR) AF: 0.198 AC: 6514 AN: 32820

American (AMR) AF: 0.0276 AC: 1142 AN: 41358

Ashkenazi Jewish (ASJ) AF: 0.0634 AC: 1623 AN: 25580

East Asian (EAS) AF: 0.142 AC: 5508 AN: 38706

South Asian (SAS) AF: 0.106 AC: 8785 AN: 82492

European-Finnish (FIN) AF: 0.0332 AC: 1732 AN: 52142

Middle Eastern (MID) AF: 0.0644 AC: 367 AN: 5698

European-Non Finnish (NFE) AF: 0.0288 AC: 31132 AN: 1081880

Other (OTH) AF: 0.0577 AC: 3410 AN: 59054

GnomAD4 genome AF: 0.0809 AC: 12285 AN: 151948 Hom.: 834 Cov.: 32 AF XY: 0.0829 AC XY: 6161 AN XY: 74310

African (AFR) AF: 0.181 AC: 7500 AN: 41480

American (AMR) AF: 0.0396 AC: 605 AN: 15276

Ashkenazi Jewish (ASJ) AF: 0.0584 AC: 202 AN: 3460

East Asian (EAS) AF: 0.152 AC: 784 AN: 5156

South Asian (SAS) AF: 0.114 AC: 547 AN: 4808

European-Finnish (FIN) AF: 0.0289 AC: 304 AN: 10534

Middle Eastern (MID) AF: 0.0646 AC: 19 AN: 294

European-Non Finnish (NFE) AF: 0.0319 AC: 2165 AN: 67922

Other (OTH) AF: 0.0682 AC: 144 AN: 2112

Alfa AF: 0.0536 Hom.: 369

Bravo AF: 0.0852

Asia WGS AF: 0.140 AC: 486 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:9

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:6

Jan 08, 2016

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

-

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

-

Genetic Services Laboratory, University of Chicago

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

Likely benign based on allele frequency in 1000 Genomes Project or ESP global frequency and its presence in a patient with a rare or unrelated disease phenotype. NOT Sanger confirmed. -

May 03, 2021

Athena Diagnostics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

-

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

-

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Episodic ataxia type 2;C4310716:Developmental and epileptic encephalopathy, 42 Benign:1

Feb 04, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Inborn genetic diseases Benign:1

Jan 08, 2016

Ambry Genetics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

not provided Benign:1

-

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.52
CADD	Benign	11
DANN	Benign	0.63
PhyloP100		0.064
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: rs16006; hg19: chr19-13470522; COSMIC: COSV64199446; COSMIC: COSV64199446;