chr16-1213792-G-C

Position:

• chr16-1213792-G-C

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2

The NM_021098.3(CACNA1H):​c.4790G>C​(p.Arg1597Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000135 in 1,411,470 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000013 (0 hom.)
• Consequence: CACNA1H NM_021098.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.18

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 Likely_benign. Variant got -4 ACMG points.

• BS2: High AC in GnomAdExome4 at 19 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CACNA1H	NM_021098.3	c.4790G>C	p.Arg1597Pro	missense_variant	27/35	ENST00000348261.11	NP_066921.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CACNA1H	ENST00000348261.11	c.4790G>C	p.Arg1597Pro	missense_variant	27/35	1	NM_021098.3	ENSP00000334198	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.0000115 AC: 2 AN: 173394 Hom.: 0 AF XY: 0.0000107 AC XY: 1 AN XY: 93452

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.0000713

Gnomad NFE exome AF: 0.0000137

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000135 AC: 19 AN: 1411470 Hom.: 0 Cov.: 31 AF XY: 0.0000115 AC XY: 8 AN XY: 698010

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: 0.0000220

Gnomad4 NFE exome AF: 0.0000156

Gnomad4 OTH exome AF: 0.0000170

GnomAD4 genome Cov.: 32

ExAC AF: 0.0000339 AC: 4

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.73
BayesDel_addAF	Pathogenic	0.21	D
BayesDel_noAF	Uncertain	0.13
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.55	D;.;.;.
Eigen	Benign	0.061
Eigen_PC	Benign	0.071
FATHMM_MKL	Uncertain	0.81	D
LIST_S2	Uncertain	0.95	D;D;D;.
M_CAP	Uncertain	0.18	D
MetaRNN	Uncertain	0.62	D;D;D;D
MetaSVM	Pathogenic	0.97	D
MutationTaster	Benign	0.59	D;D;D
PrimateAI	Uncertain	0.72	T
PROVEAN	Uncertain	-4.0	D;.;D;D
REVEL	Uncertain	0.57
Sift	Benign	0.26	T;.;T;T
Sift4G	Benign	0.22	T;.;T;T
Polyphen		0.97	D;.;P;P
Vest4		0.69
MutPred		0.47		Gain of catalytic residue at R1597 (P = 0.0143);.;.;.;
MVP		0.93
ClinPred		0.93	D
GERP RS		3.9
Varity_R		0.70
gMVP		0.81

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: rs370079169; hg19: chr16-1263792;