rs779011503

Positions:

chr16-1206204-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PP3_ModerateBS2

The ENST00000348261.11(CACNA1H):c.2704C>T(p.Arg902Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000257 in 1,593,828 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 (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R902Q) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000027 ( 0 hom. )

Consequence

CACNA1H
ENST00000348261.11 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 2.45

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 -2 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.907

BS2

High AC in GnomAdExome4 at 39 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CACNA1H	NM_021098.3 linkuse as main transcript	c.2704C>T	p.Arg902Trp	missense_variant	12/35	ENST00000348261.11	NP_066921.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CACNA1H	ENST00000348261.11 linkuse as main transcript	c.2704C>T	p.Arg902Trp	missense_variant	12/35	1	NM_021098.3	ENSP00000334198	P4	O95180-1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152254

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:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.0000271

AC:

AN:

1441574

Hom.:

Cov.:

AF XY:

0.0000280

AC XY:

AN XY:

715016

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000258

Gnomad4 SAS exome

AF:

0.0000121

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000335

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152254

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74384

show subpopulations

Gnomad4 AFR

AF:

0.00

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:

0.0000294

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ExAC

AF:

0.00000834

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

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Baylor Genetics

Sep 11, 2018

This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -

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

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 22, 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. Experimental studies have shown that this missense change affects CACNA1H function (PMID: 16754686). 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 expected to disrupt CACNA1H protein function. ClinVar contains an entry for this variant (Variation ID: 529571). This missense change has been observed in individual(s) with autism spectrum disorder (PMID: 16754686). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This sequence change replaces arginine, which is basic and polar, with tryptophan, which is neutral and slightly polar, at codon 902 of the CACNA1H protein (p.Arg902Trp). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.46

BayesDel_addAF

Pathogenic

0.38

BayesDel_noAF

Pathogenic

0.31

CADD

Uncertain

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.92

D;.;.;.

Eigen

Uncertain

0.57

Eigen_PC

Uncertain

0.37

FATHMM_MKL

Benign

0.70

LIST_S2

Pathogenic

0.98

D;D;D;.

M_CAP

Pathogenic

0.74

MetaRNN

Pathogenic

0.91

D;D;D;D

MetaSVM

Pathogenic

1.1

MutationAssessor

Pathogenic

3.7

H;.;H;H

MutationTaster

Benign

0.98

D;D;D

PrimateAI

Pathogenic

0.87

PROVEAN

Pathogenic

-5.8

D;.;D;D

REVEL

Pathogenic

0.79

Sift

Pathogenic

0.0

D;.;D;D

Sift4G

Pathogenic

0.0

D;.;D;D

Polyphen

1.0

D;.;D;D

Vest4

0.82

MutPred

0.66

Gain of MoRF binding (P = 0.1059);.;Gain of MoRF binding (P = 0.1059);Gain of MoRF binding (P = 0.1059);

MVP

0.97

ClinPred

0.99

GERP RS

1.9

Varity_R

0.81

gMVP

0.91

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