16-1209326-C-G

Position:

• chr16-1209326-C-G

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4 BP6 BS2

The NM_021098.3(CACNA1H):​c.3658C>G​(p.Gln1220Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000125 in 1,597,830 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.000085 (0 hom., cov: 33)
  • Exomes 𝑓: 0.0000048 (0 hom.)
• Consequence: CACNA1H NM_021098.3 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:1
• Conservation: PhyloP100: 3.13

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 -6 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.3066622).
• BP6: Variant 16-1209326-C-G is Benign according to our data. Variant chr16-1209326-C-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 566607.We mark this variant Likely_benign, oryginal submissions are: {Benign=1, Uncertain_significance=1}.
• BS2: High AC in GnomAd4 at 13 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CACNA1H	NM_021098.3	c.3658C>G	p.Gln1220Glu	missense_variant	17/35	ENST00000348261.11	NP_066921.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CACNA1H	ENST00000348261.11	c.3658C>G	p.Gln1220Glu	missense_variant	17/35	1	NM_021098.3	ENSP00000334198	P4

Frequencies

GnomAD3 genomes AF: 0.0000854 AC: 13 AN: 152234 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.000265

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

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: 0.00000875 AC: 2 AN: 228464 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 126742

Gnomad AFR exome AF: 0.0000723

Gnomad AMR exome AF: 0.0000293

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

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: 0.00000484 AC: 7 AN: 1445596 Hom.: 0 Cov.: 31 AF XY: 0.00000278 AC XY: 2 AN XY: 719582

Gnomad4 AFR exome AF: 0.000149

Gnomad4 AMR exome AF: 0.0000224

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: 0.00

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome AF: 0.0000854 AC: 13 AN: 152234 Hom.: 0 Cov.: 33 AF XY: 0.0000807 AC XY: 6 AN XY: 74372

Gnomad4 AFR AF: 0.000265

Gnomad4 AMR AF: 0.000131

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

Bravo AF: 0.0000793

ExAC AF: 0.00000850 AC: 1

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

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

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Jan 06, 2022

- -

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

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 05, 2022

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.074
BayesDel_addAF	Benign	-0.099	T
BayesDel_noAF	Benign	-0.19
CADD	Benign	21
DANN	Benign	0.75
DEOGEN2	Benign	0.10	T;.;.;.
Eigen	Benign	-0.11
Eigen_PC	Benign	-0.15
FATHMM_MKL	Uncertain	0.86	D
LIST_S2	Benign	0.76	T;T;T;.
M_CAP	Pathogenic	0.53	D
MetaRNN	Benign	0.31	T;T;T;T
MetaSVM	Uncertain	0.18	D
MutationAssessor	Uncertain	2.7	M;.;M;M
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Uncertain	0.54	T
PROVEAN	Benign	-0.68	N;.;N;N
REVEL	Uncertain	0.30
Sift	Benign	0.084	T;.;T;T
Sift4G	Benign	0.32	T;.;T;T
Polyphen		0.87	P;.;B;B
Vest4		0.36
MutPred		0.21		Loss of catalytic residue at Q1220 (P = 0.1879);.;Loss of catalytic residue at Q1220 (P = 0.1879);Loss of catalytic residue at Q1220 (P = 0.1879);
MVP		0.85
ClinPred		0.11	T
GERP RS		4.1
Varity_R		0.16
gMVP		0.44

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: rs775405041; hg19: chr16-1259326;