rs370838298

chr16-1209312-G-Achr16-1209312-G-T

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BS1 BS2

The NM_021098.3(CACNA1H):c.3644G>A(p.Arg1215His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000457 in 1,597,102 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R1215C) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.00014 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000036 (0 hom.)
• Consequence: CACNA1H NM_021098.3 missense
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: 0.162

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]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.030949771).
• BP6: Variant 16-1209312-G-A is Benign according to our data. Variant chr16-1209312-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 460092.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000138 (21/152328) while in subpopulation AFR AF= 0.000433 (18/41586). AF 95% confidence interval is 0.000279. There are 0 homozygotes in gnomad4. There are 14 alleles in male gnomad4 subpopulation. This position pass quality control queck.
• BS2: High AC in GnomAd at 20 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CACNA1H	NM_021098.3	c.3644G>A	p.Arg1215His	missense_variant	17/35	ENST00000348261.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CACNA1H	ENST00000348261.11	c.3644G>A	p.Arg1215His	missense_variant	17/35	1	NM_021098.3	P4

Frequencies

GnomAD3 genomes AF: 0.000131 AC: 20 AN: 152212 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.000410

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: 0.0000942

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.000478

GnomAD3 exomes AF: 0.0000799 AC: 18 AN: 225346 Hom.: 0 AF XY: 0.000104 AC XY: 13 AN XY: 125248

Gnomad AFR exome AF: 0.000670

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000334

Gnomad FIN exome AF: 0.0000840

Gnomad NFE exome AF: 0.0000581

Gnomad OTH exome AF: 0.000175

GnomAD4 exome AF: 0.0000360 AC: 52 AN: 1444774 Hom.: 0 Cov.: 32 AF XY: 0.0000473 AC XY: 34 AN XY: 719120

Gnomad4 AFR exome AF: 0.000449

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000349

Gnomad4 FIN exome AF: 0.000103

Gnomad4 NFE exome AF: 0.0000261

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.000138 AC: 21 AN: 152328 Hom.: 0 Cov.: 33 AF XY: 0.000188 AC XY: 14 AN XY: 74490

Gnomad4 AFR AF: 0.000433

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000193

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.0000942

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.0000868 Hom.: 0

Bravo AF: 0.000125

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000126 AC: 1

ExAC AF: 0.000111 AC: 13

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Inborn genetic diseases Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 21, 2022

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Idiopathic generalized epilepsy;C4310756:Hyperaldosteronism, familial, type IV Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Oct 13, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.071
BayesDel_addAF	Benign	-0.35	T
BayesDel_noAF	Benign	-0.38
Cadd	Benign	2.2
Dann	Benign	0.80
DEOGEN2	Benign	0.088	T;.;.;.
Eigen	Benign	-1.4
Eigen_PC	Benign	-1.4
FATHMM_MKL	Benign	0.037	N
LIST_S2	Benign	0.68	T;T;T;.
M_CAP	Uncertain	0.11	D
MetaRNN	Benign	0.031	T;T;T;T
MetaSVM	Uncertain	-0.039	T
MutationAssessor	Benign	-0.17	N;.;N;N
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Benign	0.40	T
PROVEAN	Benign	0.11	N;.;N;N
REVEL	Benign	0.17
Sift	Benign	0.58	T;.;T;T
Sift4G	Benign	0.38	T;.;T;T
Polyphen		0.0	B;.;B;B
Vest4		0.13
MVP		0.37
ClinPred		0.0023	T
GERP RS		-3.3
Varity_R		0.024
gMVP		0.40

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

Other links and lift over

dbSNP: rs370838298; hg19: chr16-1259312; COSMIC: COSV61984727; COSMIC: COSV61984727;