rs1555514961

chr16-1208162-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_021098.3(CACNA1H):c.3304G>A(p.Asp1102Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000704 in 1,420,054 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.0e-7 (0 hom.)
• Consequence: CACNA1H NM_021098.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 8.49

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 Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3564337).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CACNA1H	NM_021098.3	c.3304G>A	p.Asp1102Asn	missense_variant	16/35	ENST00000348261.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CACNA1H	ENST00000348261.11	c.3304G>A	p.Asp1102Asn	missense_variant	16/35	1	NM_021098.3	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 7.04e-7 AC: 1 AN: 1420054 Hom.: 0 Cov.: 33 AF XY: 0.00000142 AC XY: 1 AN XY: 703020

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: 9.15e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Epilepsy, childhood absence, susceptibility to, 6 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Mayo Clinic Laboratories, Mayo Clinic

Jun 23, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.061	T
BayesDel_noAF	Benign	-0.32
Cadd	Benign	22
Dann	Benign	0.92
DEOGEN2	Benign	0.21	T;.;.;.
Eigen	Benign	-0.088
Eigen_PC	Benign	-0.11
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Benign	0.64	T;T;T;.
M_CAP	Uncertain	0.25	D
MetaRNN	Benign	0.36	T;T;T;T
MetaSVM	Uncertain	-0.18	T
MutationAssessor	Uncertain	2.2	M;.;M;M
MutationTaster	Benign	0.69	N;N;N
PrimateAI	Benign	0.38	T
PROVEAN	Benign	-2.0	N;.;N;N
REVEL	Benign	0.25
Sift	Benign	0.28	T;.;T;T
Sift4G	Benign	0.35	T;.;T;T
Polyphen		0.36	B;.;B;B
Vest4		0.28
MutPred		0.15		Gain of methylation at R1105 (P = 0.0913);.;Gain of methylation at R1105 (P = 0.0913);Gain of methylation at R1105 (P = 0.0913);
MVP		0.88
ClinPred		0.76	D
GERP RS		4.0
Varity_R		0.14
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

Other links and lift over

dbSNP: rs1555514961; hg19: chr16-1258162;