chr7-81950394-A-G

Position:

chr7-81950394-A-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM4BS2

The NM_000722.4(CACNA2D1):c.3274T>C(p.Ter1092ArgextTer25) variant causes a stop lost change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000868 in 1,613,222 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 Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000082 ( 0 hom. )

Consequence

CACNA2D1
NM_000722.4 stop_lost

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 7.21

Variant links:

Genes affected

CACNA2D1 (HGNC:1399): (calcium voltage-gated channel auxiliary subunit alpha2delta 1) The preproprotein encoded by this gene is cleaved into multiple chains that comprise the alpha-2 and delta subunits of the voltage-dependent calcium channel complex. Calcium channels mediate the influx of calcium ions into the cell upon membrane polarization. Mutations in this gene can cause cardiac deficiencies, including Brugada syndrome and short QT syndrome. Alternate splicing results in multiple transcript variants, some of which may lack the delta subunit portion. [provided by RefSeq, Nov 2014]

CACNA2D1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM4

Stoplost variant in NM_000722.4 Downstream stopcodon found after 38 codons.

BS2

High AC in GnomAdExome4 at 12 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CACNA2D1	NM_000722.4 linkuse as main transcript	c.3274T>C	p.Ter1092ArgextTer25	stop_lost	39/39	ENST00000356860.8	NP_000713.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CACNA2D1	ENST00000356860.8 linkuse as main transcript	c.3274T>C	p.Ter1092ArgextTer25	stop_lost	39/39	1	NM_000722.4	ENSP00000349320		P54289-2
CACNA2D1	ENST00000443883.2 linkuse as main transcript	c.3310T>C	p.Ter1104ArgextTer25	stop_lost	39/39	5		ENSP00000409374	P1	P54289-1
CACNA2D1	ENST00000705962.1 linkuse as main transcript	c.3154T>C	p.Ter1052ArgextTer25	stop_lost	38/38			ENSP00000516190
CACNA2D1	ENST00000705961.1 linkuse as main transcript	c.3043T>C	p.Ter1015ArgextTer25	stop_lost	37/37			ENSP00000516189

Frequencies

GnomAD3 genomes

AF:

0.0000132

AC:

AN:

152074

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000656

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000797

AC:

AN:

251002

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135638

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000881

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000821

AC:

AN:

1461148

Hom.:

Cov.:

AF XY:

0.00000963

AC XY:

AN XY:

726868

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000810

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000132

AC:

AN:

152074

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74282

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000656

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Brugada syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 31, 2024

This sequence change disrupts the translational stop signal of the CACNA2D1 mRNA. It is expected to extend the length of the CACNA2D1 protein by 25 additional amino acid residues. This variant is present in population databases (rs759988243, gnomAD 0.003%). This variant has not been reported in the literature in individuals affected with CACNA2D1-related conditions. ClinVar contains an entry for this variant (Variation ID: 1729659). Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 10, 2020

The c.3274T>C variant (also known as p.*1092Rext*25), located in coding exon 39 of the CACNA2D1 gene, results from a T to C substitution at nucleotide position 3274. This alteration disrupts the stop codon of the CACNA2D1 gene and is predicted to preserve the native sequence while resulting in the elongation of the protein by 25 amino acids. The exact functional effect of the additional amino acids is unknown. In addition, loss of function of CACNA2D1 has not been clearly established as a mechanism of disease. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.059

BayesDel_noAF

Benign

-0.23

CADD

Benign

DANN

Benign

0.85

Eigen

Pathogenic

0.94

Eigen_PC

Pathogenic

0.73

FATHMM_MKL

Uncertain

0.97

MutationTaster

Benign

1.0

N;N;N

Vest4

0.13

GERP RS

5.0

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