NM_021098.3:c.56C>G

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_021098.3(CACNA1H):c.56C>G(p.Pro19Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000968 in 1,239,036 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 Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 30)

Exomes 𝑓: 0.0000092 ( 0 hom. )

Consequence

CACNA1H
NM_021098.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.338

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 Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.23335615).

BS2

High AC in GnomAdExome4 at 10 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CACNA1H	NM_021098.3 link	c.56C>G	p.Pro19Arg	missense_variant	Exon 2 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.56C>G	p.Pro19Arg	missense_variant	Exon 2 of 35	1	NM_021098.3	ENSP00000334198.7	O95180-1
CACNA1H	ENST00000565831.6 link	c.56C>G	p.Pro19Arg	missense_variant	Exon 1 of 33	1		ENSP00000455840.1	O95180-2
CACNA1H	ENST00000638323.1 link	c.56C>G	p.Pro19Arg	missense_variant	Exon 2 of 35	5		ENSP00000492267.1	A0A1W2PR14
CACNA1H	ENST00000639478.1 link	n.56C>G		non_coding_transcript_exon_variant	Exon 2 of 35	5		ENSP00000491945.1	A0A1W2PQW2
CACNA1H	ENST00000640028.1 link	n.56C>G		non_coding_transcript_exon_variant	Exon 2 of 35	5		ENSP00000491488.1	A0A1W2PQ19

Frequencies

GnomAD3 genomes

AF:

0.0000133

AC:

AN:

150886

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000243

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:

0.00000919

AC:

AN:

1088150

Hom.:

Cov.:

AF XY:

0.00000965

AC XY:

AN XY:

517890

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000108

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000133

AC:

AN:

150886

Hom.:

Cov.:

AF XY:

0.0000136

AC XY:

AN XY:

73712

show subpopulations

Gnomad4 AFR

AF:

0.0000243

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000148

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

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

Uncertain:1

Nov 03, 2020

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt CACNA1H protein function. This variant has not been reported in the literature in individuals with CACNA1H-related conditions. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate insufficient coverage at this position in the ExAC database. This sequence change replaces proline with arginine at codon 19 of the CACNA1H protein (p.Pro19Arg). The proline residue is weakly conserved and there is a moderate physicochemical difference between proline and arginine. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Uncertain

0.034

BayesDel_noAF

Benign

-0.19

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.13

T;.;.;.

Eigen

Benign

-0.80

Eigen_PC

Benign

-0.79

FATHMM_MKL

Benign

0.033

LIST_S2

Benign

0.47

T;T;T;.

M_CAP

Pathogenic

0.99

MetaRNN

Benign

0.23

T;T;T;T

MetaSVM

Uncertain

0.059

MutationAssessor

Benign

1.1

L;.;L;L

PrimateAI

Pathogenic

0.86

PROVEAN

Benign

-0.87

N;.;N;N

REVEL

Uncertain

0.31

Sift

Benign

0.040

D;.;D;D

Sift4G

Benign

0.10

T;.;T;T

Polyphen

0.0040

B;.;B;B

Vest4

0.18

MutPred

0.34

Loss of glycosylation at P19 (P = 0.0129);Loss of glycosylation at P19 (P = 0.0129);Loss of glycosylation at P19 (P = 0.0129);Loss of glycosylation at P19 (P = 0.0129);

MVP

0.64

ClinPred

0.11

GERP RS

1.8

Varity_R

0.057

gMVP

0.42

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