7-81950414-C-T

Position:

chr7-81950414-C-T

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2

The NM_000722.4(CACNA2D1):c.3254G>A(p.Gly1085Asp) variant causes a missense change. The variant allele was found at a frequency of 0.0000198 in 1,612,996 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G1085S) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000021 ( 0 hom. )

Consequence

CACNA2D1
NM_000722.4 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 4.32

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 -4 ACMG points.

BS2

High AC in GnomAdExome4 at 31 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CACNA2D1	NM_000722.4 linkuse as main transcript	c.3254G>A	p.Gly1085Asp	missense_variant	39/39	ENST00000356860.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CACNA2D1	ENST00000356860.8 linkuse as main transcript	c.3254G>A	p.Gly1085Asp	missense_variant	39/39	1	NM_000722.4		P54289-2
CACNA2D1	ENST00000443883.2 linkuse as main transcript	c.3290G>A	p.Gly1097Asp	missense_variant	39/39	5		P1	P54289-1
CACNA2D1	ENST00000705962.1 linkuse as main transcript	c.3134G>A	p.Gly1045Asp	missense_variant	38/38
CACNA2D1	ENST00000705961.1 linkuse as main transcript	c.3023G>A	p.Gly1008Asp	missense_variant	37/37

Frequencies

GnomAD3 genomes

AF:

0.00000659

AC:

AN:

151778

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000159

AC:

AN:

250890

Hom.:

AF XY:

0.00000738

AC XY:

AN XY:

135570

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:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000353

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000212

AC:

AN:

1461218

Hom.:

Cov.:

AF XY:

0.0000248

AC XY:

AN XY:

726912

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

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:

0.0000270

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.00000659

AC:

AN:

151778

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74082

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

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

Alfa

AF:

0.0000330

Hom.:

Bravo

AF:

0.0000151

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.0000330

AC:

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

Invitae

Dec 09, 2022

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. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. This variant has not been reported in the literature in individuals affected with CACNA2D1-related conditions. This variant is present in population databases (rs138331326, gnomAD 0.004%). This sequence change replaces glycine, which is neutral and non-polar, with aspartic acid, which is acidic and polar, at codon 1085 of the CACNA2D1 protein (p.Gly1085Asp). -

Cardiovascular phenotype

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 01, 2023

The p.G1085D variant (also known as c.3254G>A), located in coding exon 39 of the CACNA2D1 gene, results from a G to A substitution at nucleotide position 3254. The glycine at codon 1085 is replaced by aspartic acid, an amino acid with similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. 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

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.38

CADD

Uncertain

DANN

Uncertain

1.0

Eigen

Uncertain

0.42

Eigen_PC

Uncertain

0.46

FATHMM_MKL

Uncertain

0.92

LIST_S2

Benign

0.72

T;T

M_CAP

Benign

0.024

MetaRNN

Uncertain

0.44

T;T

MetaSVM

Benign

-0.78

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.48

PROVEAN

Benign

-1.4

N;N

REVEL

Benign

0.087

Sift

Benign

0.14

T;T

Sift4G

Uncertain

0.012

D;D

Polyphen

0.41

B;.

Vest4

0.66

MVP

0.12

MPC

0.70

ClinPred

0.46

GERP RS

5.0

Varity_R

0.36

gMVP

0.70

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