NM_021098.3:c.844G>A

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 4P and 4B. PP3_StrongBS2

The NM_021098.3(CACNA1H):c.844G>A(p.Glu282Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000137 in 1,605,776 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

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

Exomes 𝑓: 0.000014 ( 0 hom. )

Consequence

CACNA1H
NM_021098.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3O:1

Conservation

PhyloP100: 7.43

Variant links:

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.949

BS2

High AC in GnomAdExome4 at 21 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CACNA1H	NM_021098.3 link	c.844G>A	p.Glu282Lys	missense_variant	Exon 7 of 35	ENST00000348261.11	NP_066921.2	O95180-1B3KQH9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CACNA1H	ENST00000348261.11 link	c.844G>A	p.Glu282Lys	missense_variant	Exon 7 of 35	1	NM_021098.3	ENSP00000334198.7	O95180-1
CACNA1H	ENST00000565831.6 link	c.844G>A	p.Glu282Lys	missense_variant	Exon 6 of 33	1		ENSP00000455840.1	O95180-2
CACNA1H	ENST00000638323.1 link	c.805G>A	p.Glu269Lys	missense_variant	Exon 7 of 35	5		ENSP00000492267.1	A0A1W2PR14
CACNA1H	ENST00000639478.1 link	n.844G>A		non_coding_transcript_exon_variant	Exon 7 of 35	5		ENSP00000491945.1	A0A1W2PQW2
CACNA1H	ENST00000640028.1 link	n.844G>A		non_coding_transcript_exon_variant	Exon 7 of 35	5		ENSP00000491488.1	A0A1W2PQ19

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152212

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:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000169

AC:

AN:

236114

Hom.:

AF XY:

0.0000310

AC XY:

AN XY:

129046

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000227

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000144

AC:

AN:

1453564

Hom.:

Cov.:

AF XY:

0.0000166

AC XY:

AN XY:

722178

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000760

Gnomad4 SAS exome

AF:

0.0000353

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000126

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152212

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74348

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000565

Hom.:

Bravo

AF:

0.0000113

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Epilepsy, childhood absence, susceptibility to, 6

Uncertain:1Other:1

Jun 22, 2023

Neuberg Centre For Genomic Medicine, NCGM

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The observed missense c.844G>A(p.Glu282Lys) variant in CACNA1H gene has been reported previously in heterozygosu / homozygous state in individual(s) affected with hyperthermia-induced seizures and childhood absence epilepsy (Calhoun et al., 2020). This variant is reported with the allele frequency of 0.002% in the gnomAD Exomes. This variant has been reported to the ClinVar database as Uncertain Significance / risk factor. However, no details are available for independent assessment. The amino acid Glu at position 282 is changed to a Lys changing protein sequence and it might alter its composition and physico-chemical properties. The amino acid change p.Glu282Lys in CACNA1H is predicted as conserved by GERP++ and PhyloP across 100 vertebrates. Multiple lines of computational evidence (Polyphen - Possibly Damaging, SIFT - Damaging, and MutationTaster - Disease causing) predict a damaging effect on protein structure and function for this variant. For these reasons, this variant has been classified as Uncertain Significance. -

Mar 12, 2004

OMIM

Significance: risk factor

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Epilepsy, childhood absence, susceptibility to, 6;C4310756:Hyperaldosteronism, familial, type IV

Uncertain:1

Jun 14, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Idiopathic generalized epilepsy;C4310756:Hyperaldosteronism, familial, type IV

Uncertain:1

Aug 08, 2019

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glutamic acid with lysine at codon 282 of the CACNA1H protein (p.Glu282Lys). The glutamic acid residue is moderately conserved and there is a small physicochemical difference between glutamic acid and lysine. This variant is not present in population databases (ExAC no frequency). This variant has been observed in an individual affected with childhood absence epilepsy (PMID: 12891677). ClinVar contains an entry for this variant (Variation ID: 2702). This variant has been reported to affect CACNA1H protein function (PMID: 14729682, 15888660). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.22

BayesDel_addAF

Uncertain

0.15

BayesDel_noAF

Pathogenic

0.28

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.75

D;.;.;.

Eigen

Uncertain

0.63

Eigen_PC

Uncertain

0.63

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.95

D;D;D;.

M_CAP

Pathogenic

0.42

MetaRNN

Pathogenic

0.95

D;D;D;D

MetaSVM

Pathogenic

0.93

MutationAssessor

Benign

1.7

L;.;L;L

PrimateAI

Uncertain

0.62

PROVEAN

Uncertain

-3.5

D;.;D;D

REVEL

Pathogenic

0.77

Sift

Uncertain

0.0050

D;.;D;D

Sift4G

Uncertain

0.0070

D;.;D;D

Polyphen

0.94

P;.;P;P

Vest4

0.65

MutPred

0.85

Gain of methylation at E282 (P = 0.0039);.;Gain of methylation at E282 (P = 0.0039);Gain of methylation at E282 (P = 0.0039);

MVP

0.96

ClinPred

0.70

GERP RS

4.4

Varity_R

0.43

gMVP

0.88

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

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