NM_021098.3:c.21C>A

Variant names:

• chr16-1153758-C-A
• rs904297221
• NM_021098.3:c.21C>A

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 0P and 11B. BP4_Strong BP6_Moderate BP7 BS2

The NM_021098.3(CACNA1H):​c.21C>A​(p.Ala7Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000362 in 1,214,612 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. A7A) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 30)
  • Exomes 𝑓: 0.000040 (0 hom.)
• Consequence: CACNA1H NM_021098.3 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -1.47
• Publications: 0 publications found

Genes affected

CACNA1H (HGNC:1395): (calcium voltage-gated channel subunit alpha1 H) This gene encodes a T-type member of the alpha-1 subunit family, a protein in the voltage-dependent calcium channel complex. Calcium channels mediate the influx of calcium ions into the cell upon membrane polarization and consist of a complex of alpha-1, alpha-2/delta, beta, and gamma subunits in a 1:1:1:1 ratio. The alpha-1 subunit has 24 transmembrane segments and forms the pore through which ions pass into the cell. There are multiple isoforms of each of the proteins in the complex, either encoded by different genes or the result of alternative splicing of transcripts. Alternate transcriptional splice variants, encoding different isoforms, have been characterized for the gene described here. Studies suggest certain mutations in this gene lead to childhood absence epilepsy (CAE). [provided by RefSeq, Jul 2008]

CACNA1H Gene-Disease associations (from GenCC):

• hyperaldosteronism, familial, type IV

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• childhood absence epilepsy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• epilepsy, childhood absence, susceptibility to, 6

  Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P
• epilepsy

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Benign. The variant received -11 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.52).
• BP6: Variant 16-1153758-C-A is Benign according to our data. Variant chr16-1153758-C-A is described in ClinVar as Likely_benign. ClinVar VariationId is 1134904.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-1.47 with no splicing effect.
• BS2: High AC in GnomAdExome4 at 43 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_021098.3. 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
	CACNA1H	NM_021098.3	MANE Select	c.21C>A	p.Ala7Ala	synonymous	Exon 2 of 35	NP_066921.2	O95180-1
	CACNA1H	NM_001005407.2		c.21C>A	p.Ala7Ala	synonymous	Exon 2 of 34	NP_001005407.1	O95180-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNA1H	ENST00000348261.11	TSL:1 MANE Select	c.21C>A	p.Ala7Ala	synonymous	Exon 2 of 35	ENSP00000334198.7	O95180-1
	CACNA1H	ENST00000569107.6	TSL:1	c.21C>A	p.Ala7Ala	synonymous	Exon 2 of 34	ENSP00000454990.2	H3BNT0
	CACNA1H	ENST00000711493.1		c.21C>A	p.Ala7Ala	synonymous	Exon 2 of 34	ENSP00000518778.1	A0AAA9YHG8

Frequencies

GnomAD3 genomes AF: 0.00000663 AC: 1 AN: 150932 Hom.: 0 Cov.: 30

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: 0.0000148

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.0000404 AC: 43 AN: 1063680 Hom.: 0 Cov.: 32 AF XY: 0.0000258 AC XY: 13 AN XY: 503378

African (AFR) AF: 0.00 AC: 0 AN: 21748

American (AMR) AF: 0.00 AC: 0 AN: 7464

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 12988

East Asian (EAS) AF: 0.00 AC: 0 AN: 23692

South Asian (SAS) AF: 0.00 AC: 0 AN: 22734

European-Finnish (FIN) AF: 0.0000473 AC: 1 AN: 21140

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 2770

European-Non Finnish (NFE) AF: 0.0000462 AC: 42 AN: 909314

Other (OTH) AF: 0.00 AC: 0 AN: 41830

GnomAD4 genome AF: 0.00000663 AC: 1 AN: 150932 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 73680

African (AFR) AF: 0.00 AC: 0 AN: 41250

American (AMR) AF: 0.00 AC: 0 AN: 15184

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3460

East Asian (EAS) AF: 0.00 AC: 0 AN: 5054

South Asian (SAS) AF: 0.00 AC: 0 AN: 4810

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10284

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 312

European-Non Finnish (NFE) AF: 0.0000148 AC: 1 AN: 67598

Other (OTH) AF: 0.00 AC: 0 AN: 2068

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	Idiopathic generalized epilepsy;C4310756:Hyperaldosteronism, familial, type IV (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.52
CADD	Benign	6.0
DANN	Benign	0.76
PhyloP100		-1.5
PromoterAI		-0.016	Neutral

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: rs904297221; hg19: chr16-1203758;