NM_021098.3:c.3261C>T

Variant names:

• chr16-1208119-C-T
• rs57606792
• NM_021098.3:c.3261C>T

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The NM_021098.3(CACNA1H):​c.3261C>T​(p.Thr1087Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★). Synonymous variant affecting the same amino acid position (i.e. T1087T) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: CACNA1H NM_021098.3 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -5.32
• Publications: 1 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)

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.68).
• BP6: Variant 16-1208119-C-T is Benign according to our data. Variant chr16-1208119-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 1129854.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-5.32 with no splicing effect.

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.3261C>T	p.Thr1087Thr	synonymous	Exon 16 of 35	NP_066921.2
	CACNA1H	NM_001005407.2		c.3261C>T	p.Thr1087Thr	synonymous	Exon 16 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.3261C>T	p.Thr1087Thr	synonymous	Exon 16 of 35	ENSP00000334198.7
	CACNA1H	ENST00000569107.6	TSL:1	c.3261C>T	p.Thr1087Thr	synonymous	Exon 16 of 34	ENSP00000454990.2
	CACNA1H	ENST00000711493.1		c.3261C>T	p.Thr1087Thr	synonymous	Exon 16 of 34	ENSP00000518778.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1441892 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 715506

African (AFR) AF: 0.00 AC: 0 AN: 32904

American (AMR) AF: 0.00 AC: 0 AN: 42536

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25748

East Asian (EAS) AF: 0.00 AC: 0 AN: 38390

South Asian (SAS) AF: 0.00 AC: 0 AN: 82702

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50868

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5352

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1103710

Other (OTH) AF: 0.00 AC: 0 AN: 59682

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000152 Hom.: 0

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

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

Dec 15, 2019

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.68
CADD	Benign	1.8
DANN	Benign	0.81
PhyloP100		-5.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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: rs57606792; hg19: chr16-1258119;