rs16024

Variant names:

• chr19-13298593-C-G
• rs16024
• NM_001127222.2:c.3040G>C

Your query was ambiguous. Multiple possible variants found:

• chr19-13298593-C-G
• chr19-13298593-C-T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_023035.3(CACNA1A):​c.3052G>C​(p.Glu1018Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000216 in 1,389,336 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E1018K) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000022 (0 hom.)
• Consequence: CACNA1A NM_023035.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.49
• Publications: 0 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: 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=0.19763258).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_023035.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNA1A	NM_001127222.2	MANE Select	c.3040G>C	p.Glu1014Gln	missense	Exon 19 of 47	NP_001120694.1
	CACNA1A	NM_001127221.2	MANE Plus Clinical	c.3043G>C	p.Glu1015Gln	missense	Exon 19 of 47	NP_001120693.1
	CACNA1A	NM_023035.3		c.3052G>C	p.Glu1018Gln	missense	Exon 19 of 48	NP_075461.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNA1A	ENST00000360228.11	TSL:1 MANE Select	c.3040G>C	p.Glu1014Gln	missense	Exon 19 of 47	ENSP00000353362.5
	CACNA1A	ENST00000638009.2	TSL:1 MANE Plus Clinical	c.3043G>C	p.Glu1015Gln	missense	Exon 19 of 47	ENSP00000489913.1
	CACNA1A	ENST00000638029.1	TSL:5	c.3052G>C	p.Glu1018Gln	missense	Exon 19 of 48	ENSP00000489829.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000216 AC: 3 AN: 1389336 Hom.: 0 Cov.: 32 AF XY: 0.00000146 AC XY: 1 AN XY: 685246

African (AFR) AF: 0.00 AC: 0 AN: 29836

American (AMR) AF: 0.00 AC: 0 AN: 35086

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 24836

East Asian (EAS) AF: 0.00 AC: 0 AN: 33996

South Asian (SAS) AF: 0.00 AC: 0 AN: 78860

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49204

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5658

European-Non Finnish (NFE) AF: 0.00000279 AC: 3 AN: 1074312

Other (OTH) AF: 0.00 AC: 0 AN: 57548

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.27
BayesDel_addAF	Benign	-0.00051	T
BayesDel_noAF	Benign	-0.24
CADD	Benign	19
DANN	Benign	0.61
DEOGEN2	Benign	0.029	T
Eigen	Benign	-0.71
Eigen_PC	Benign	-0.71
FATHMM_MKL	Benign	0.31	N
LIST_S2	Uncertain	0.86	D
M_CAP	Pathogenic	0.71	D
MetaRNN	Benign	0.20	T
MetaSVM	Uncertain	-0.17	T
MutationAssessor	Benign	1.6	L
PhyloP100		3.5
PrimateAI	Pathogenic	0.82	D
PROVEAN	Benign	-1.4	N
REVEL	Benign	0.22
Sift	Benign	0.28	T
Sift4G	Benign	0.23	T
Vest4		0.13
MutPred		0.22		Gain of helix (P = 0.0425)
MVP		0.84
MPC		1.1
ClinPred		0.37	T
GERP RS		3.5
Varity_R		0.18
gMVP		0.36
Mutation Taster		=97/3	polymorphism

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: rs16024; hg19: chr19-13409407;