16-1220680-C-T

Position:

chr16-1220680-C-T

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 0P and 7B. BP4_ModerateBP6BS2

The NM_021098.3(CACNA1H):c.6748C>T(p.Arg2250Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000367 in 1,609,328 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 Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000036 ( 0 hom. )

Consequence

CACNA1H
NM_021098.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:1

Conservation

PhyloP100: 1.24

Variant links:

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 links:

CACNA1H (HGNC:):

CACNA1H links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -7 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.11096549).

BP6

Variant 16-1220680-C-T is Benign according to our data. Variant chr16-1220680-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 643534.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=1, Benign=1}.

BS2

High AC in GnomAd4 at 6 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CACNA1H	NM_021098.3 linkuse as main transcript	c.6748C>T	p.Arg2250Cys	missense_variant	35/35	ENST00000348261.11	NP_066921.2	O95180-1B3KQH9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
CACNA1H	ENST00000348261.11 linkuse as main transcript	c.6748C>T	p.Arg2250Cys	missense_variant	35/35	1	NM_021098.3	ENSP00000334198.7	O95180-1
CACNA1H	ENST00000565831.6 linkuse as main transcript	c.6730C>T	p.Arg2244Cys	missense_variant	33/33	1		ENSP00000455840.1	O95180-2
CACNA1H	ENST00000638323.1 linkuse as main transcript	c.6709C>T	p.Arg2237Cys	missense_variant	35/35	5		ENSP00000492267.1	A0A1W2PR14
CACNA1H	ENST00000569107.5 linkuse as main transcript	c.2986C>T	p.Arg996Cys	missense_variant	17/17	1		ENSP00000454990.2	H3BNT0
CACNA1H	ENST00000564231.5 linkuse as main transcript	c.2938C>T	p.Arg980Cys	missense_variant	18/18	1		ENSP00000457555.2	H3BUA8
CACNA1H	ENST00000562079.5 linkuse as main transcript	c.2920C>T	p.Arg974Cys	missense_variant	17/17	1		ENSP00000454581.2	H3BMW6
CACNA1H	ENST00000639478.1 linkuse as main transcript	n.*1796C>T		non_coding_transcript_exon_variant	35/35	5		ENSP00000491945.1	A0A1W2PQW2
CACNA1H	ENST00000640028.1 linkuse as main transcript	n.*4566C>T		non_coding_transcript_exon_variant	35/35	5		ENSP00000491488.1	A0A1W2PQ19
CACNA1H	ENST00000639478.1 linkuse as main transcript	n.*1796C>T		3_prime_UTR_variant	35/35	5		ENSP00000491945.1	A0A1W2PQW2
CACNA1H	ENST00000640028.1 linkuse as main transcript	n.*4566C>T		3_prime_UTR_variant	35/35	5		ENSP00000491488.1	A0A1W2PQ19

Frequencies

GnomAD3 genomes

AF:

0.0000395

AC:

AN:

151990

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000966

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000194

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000513

AC:

AN:

233732

Hom.:

AF XY:

0.0000622

AC XY:

AN XY:

128520

show subpopulations

Gnomad AFR exome

AF:

0.000358

Gnomad AMR exome

AF:

0.0000298

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000998

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000293

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000364

AC:

AN:

1457338

Hom.:

Cov.:

AF XY:

0.0000373

AC XY:

AN XY:

724814

show subpopulations

Gnomad4 AFR exome

AF:

0.000120

Gnomad4 AMR exome

AF:

0.0000453

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000253

Gnomad4 SAS exome

AF:

0.0000465

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000351

Gnomad4 OTH exome

AF:

0.0000498

GnomAD4 genome

AF:

0.0000395

AC:

AN:

151990

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74230

show subpopulations

Gnomad4 AFR

AF:

0.0000966

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000194

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000225

Hom.:

Bravo

AF:

0.0000756

ESP6500AA

AF:

0.000266

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000500

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

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

Apr 09, 2022

- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 26, 2024

The c.6748C>T (p.R2250C) alteration is located in exon 35 (coding exon 34) of the CACNA1H gene. This alteration results from a C to T substitution at nucleotide position 6748, causing the arginine (R) at amino acid position 2250 to be replaced by a cysteine (C). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

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

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Apr 27, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.29

BayesDel_noAF

Benign

-0.35

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.24

T;.;.;.

Eigen

Benign

-0.13

Eigen_PC

Benign

-0.094

FATHMM_MKL

Benign

0.13

LIST_S2

Uncertain

0.89

D;D;D;.

M_CAP

Pathogenic

0.43

MetaRNN

Benign

0.11

T;T;T;T

MetaSVM

Benign

-0.99

MutationAssessor

Uncertain

2.3

M;.;.;.

PrimateAI

Uncertain

0.59

PROVEAN

Benign

-2.0

N;.;N;N

REVEL

Benign

0.089

Sift

Uncertain

0.012

D;.;D;D

Sift4G

Benign

0.15

T;.;T;T

Polyphen

0.0060

B;.;B;B

Vest4

0.40

MVP

0.38

ClinPred

0.039

GERP RS

3.5

Varity_R

0.19

gMVP

0.24

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over