rs60537026

Positions:

• chr16-1201875-C-T

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BS1 BS2

The NM_021098.3(CACNA1H):​c.1425C>T​(p.Ser475=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000126 in 1,554,472 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.00063 (0 hom., cov: 34)
  • Exomes 𝑓: 0.000071 (0 hom.)
• Consequence: CACNA1H NM_021098.3 synonymous
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -1.15

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 -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.58).
• BP6: Variant 16-1201875-C-T is Benign according to our data. Variant chr16-1201875-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 529692.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=-1.15 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00063 (96/152396) while in subpopulation AFR AF= 0.00228 (95/41598). AF 95% confidence interval is 0.00191. There are 0 homozygotes in gnomad4. There are 45 alleles in male gnomad4 subpopulation. Median coverage is 34. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 96 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CACNA1H	NM_021098.3	c.1425C>T	p.Ser475=	synonymous_variant	9/35	ENST00000348261.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CACNA1H	ENST00000348261.11	c.1425C>T	p.Ser475=	synonymous_variant	9/35	1	NM_021098.3	P4

Frequencies

GnomAD3 genomes AF: 0.000630 AC: 96 AN: 152278 Hom.: 0 Cov.: 34

Gnomad AFR AF: 0.00229

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

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: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000165 AC: 26 AN: 157690 Hom.: 0 AF XY: 0.0000951 AC XY: 8 AN XY: 84126

Gnomad AFR exome AF: 0.00295

Gnomad AMR exome AF: 0.0000400

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000898

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000713 AC: 100 AN: 1402076 Hom.: 0 Cov.: 36 AF XY: 0.0000549 AC XY: 38 AN XY: 692008

Gnomad4 AFR exome AF: 0.00280

Gnomad4 AMR exome AF: 0.0000832

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000278

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.25e-7

Gnomad4 OTH exome AF: 0.000103

GnomAD4 genome AF: 0.000630 AC: 96 AN: 152396 Hom.: 0 Cov.: 34 AF XY: 0.000604 AC XY: 45 AN XY: 74524

Gnomad4 AFR AF: 0.00228

Gnomad4 AMR AF: 0.0000653

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000592 Hom.: 0

Bravo AF: 0.000740

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Epilepsy, childhood absence, susceptibility to, 6;C4310756:Hyperaldosteronism, familial, type IV Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Feb 04, 2022

- -

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

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jan 19, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.58
CADD	Benign	2.0
DANN	Benign	0.60

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs60537026; hg19: chr16-1251875;