16-1200725-C-T

Variant names:

• chr16-1200725-C-T
• rs529122240
• NM_021098.3:c.1129C>T

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 0P and 11B. BP4_Strong BP6_Moderate BP7 BS2

The NM_021098.3(CACNA1H):​c.1129C>T​(p.Leu377Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000275 in 1,562,614 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.000046 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000026 (1 hom.)
• Consequence: CACNA1H NM_021098.3 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 2.04
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• hyperaldosteronism, familial, type IV

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• childhood absence epilepsy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• epilepsy, childhood absence, susceptibility to, 6

  Inheritance: AD Classification: LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae)

LOC124903623 (HGNC:):

ACMG classification

Our verdict: Benign. The variant received -11 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.61).
• BP6: Variant 16-1200725-C-T is Benign according to our data. Variant chr16-1200725-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 529680.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=2.04 with no splicing effect.
• BS2: High AC in GnomAd4 at 7 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_021098.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNA1H	NM_021098.3	MANE Select	c.1129C>T	p.Leu377Leu	synonymous	Exon 8 of 35	NP_066921.2
	CACNA1H	NM_001005407.2		c.1129C>T	p.Leu377Leu	synonymous	Exon 8 of 34	NP_001005407.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNA1H	ENST00000348261.11	TSL:1 MANE Select	c.1129C>T	p.Leu377Leu	synonymous	Exon 8 of 35	ENSP00000334198.7
	CACNA1H	ENST00000569107.6	TSL:1	c.1129C>T	p.Leu377Leu	synonymous	Exon 8 of 34	ENSP00000454990.2
	CACNA1H	ENST00000711493.1		c.1129C>T	p.Leu377Leu	synonymous	Exon 8 of 34	ENSP00000518778.1

Frequencies

GnomAD3 genomes AF: 0.0000460 AC: 7 AN: 152204 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000482

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000621

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000351 AC: 6 AN: 171088 AF XY: 0.0000437

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000387

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000144

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000255 AC: 36 AN: 1410292 Hom.: 1 Cov.: 33 AF XY: 0.0000287 AC XY: 20 AN XY: 696970

African (AFR) AF: 0.00 AC: 0 AN: 31958

American (AMR) AF: 0.0000272 AC: 1 AN: 36812

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25298

East Asian (EAS) AF: 0.00 AC: 0 AN: 36494

South Asian (SAS) AF: 0.000272 AC: 22 AN: 80782

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49322

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5624

European-Non Finnish (NFE) AF: 0.0000111 AC: 12 AN: 1085502

Other (OTH) AF: 0.0000171 AC: 1 AN: 58500

GnomAD4 genome AF: 0.0000460 AC: 7 AN: 152322 Hom.: 0 Cov.: 32 AF XY: 0.0000671 AC XY: 5 AN XY: 74468

African (AFR) AF: 0.0000481 AC: 2 AN: 41574

American (AMR) AF: 0.000131 AC: 2 AN: 15302

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5180

South Asian (SAS) AF: 0.000621 AC: 3 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10618

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68030

Other (OTH) AF: 0.00 AC: 0 AN: 2110

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000340

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	Idiopathic generalized epilepsy;C4310756:Hyperaldosteronism, familial, type IV (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.61
CADD	Benign	3.8
DANN	Benign	0.39
PhyloP100		2.0
Mutation Taster		=99/1	polymorphism

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

Other links and lift over

dbSNP: rs529122240; hg19: chr16-1250725;