chr16-1218399-G-A

Position:

chr16-1218399-G-A

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 1P and 4B. PP3BS2

The NM_021098.3(CACNA1H):c.5635G>A(p.Glu1879Lys) variant causes a missense change. The variant allele was found at a frequency of 0.0000212 in 1,558,020 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 0.000046 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000018 ( 0 hom. )

Consequence

CACNA1H
NM_021098.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 6.31

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 -3 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.78

BS2

High AC in GnomAd4 at 7 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CACNA1H	NM_021098.3 linkuse as main transcript	c.5635G>A	p.Glu1879Lys	missense_variant	33/35	ENST00000348261.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CACNA1H	ENST00000348261.11 linkuse as main transcript	c.5635G>A	p.Glu1879Lys	missense_variant	33/35	1	NM_021098.3	P4	O95180-1

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152224

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000481

AC:

AN:

166398

Hom.:

AF XY:

0.0000566

AC XY:

AN XY:

88280

show subpopulations

Gnomad AFR exome

AF:

0.000230

Gnomad AMR exome

AF:

0.0000789

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000865

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000295

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000185

AC:

AN:

1405678

Hom.:

Cov.:

AF XY:

0.0000274

AC XY:

AN XY:

694012

show subpopulations

Gnomad4 AFR exome

AF:

0.0000627

Gnomad4 AMR exome

AF:

0.0000549

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000880

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000120

Gnomad4 OTH exome

AF:

0.0000342

GnomAD4 genome

AF:

0.0000459

AC:

AN:

152342

Hom.:

Cov.:

AF XY:

0.0000537

AC XY:

AN XY:

74494

show subpopulations

Gnomad4 AFR

AF:

0.0000962

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000340

ESP6500AA

AF:

0.000238

AC:

ESP6500EA

AF:

0.000120

AC:

ExAC

AF:

0.0000355

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

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

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Oct 31, 2018

- -

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

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 21, 2022

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) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on CACNA1H protein function. ClinVar contains an entry for this variant (Variation ID: 529614). This variant has not been reported in the literature in individuals affected with CACNA1H-related conditions. This variant is present in population databases (rs377103385, gnomAD 0.02%). This sequence change replaces glutamic acid, which is acidic and polar, with lysine, which is basic and polar, at codon 1879 of the CACNA1H protein (p.Glu1879Lys). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.33

BayesDel_addAF

Uncertain

0.025

BayesDel_noAF

Uncertain

0.090

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.55

D;.;.;.

Eigen

Uncertain

0.34

Eigen_PC

Uncertain

0.35

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.93

D;D;D;.

M_CAP

Pathogenic

0.63

MetaRNN

Pathogenic

0.78

D;D;D;D

MetaSVM

Pathogenic

0.99

MutationAssessor

Uncertain

2.8

M;.;.;.

MutationTaster

Benign

0.99

D;D;D

PrimateAI

Uncertain

0.73

PROVEAN

Uncertain

-3.7

D;.;D;D

REVEL

Pathogenic

0.70

Sift

Uncertain

0.015

D;.;D;D

Sift4G

Uncertain

0.025

D;.;D;D

Polyphen

0.46

P;.;D;D

Vest4

0.64

MVP

0.91

ClinPred

0.84

GERP RS

4.1

Varity_R

0.52

gMVP

0.72

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