Genetic Variant NM_000722.4:c.3242G>T (chr7-81950426-C-A) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

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

The NM_000722.4(CACNA2D1):c.3242G>T(p.Trp1081Leu) variant causes a missense change. The variant allele was found at a frequency of 0.0000363 in 1,461,214 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000036 ( 0 hom. )

Consequence

CACNA2D1
NM_000722.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.12

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:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

BS2

High AC in GnomAdExome4 at 53 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CACNA2D1	NM_000722.4 link	c.3242G>T	p.Trp1081Leu	missense_variant	Exon 39 of 39	ENST00000356860.8	NP_000713.2	P54289-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CACNA2D1	ENST00000356860.8 link	c.3242G>T	p.Trp1081Leu	missense_variant	Exon 39 of 39	1	NM_000722.4	ENSP00000349320.3	P54289-2
CACNA2D1	ENST00000443883.2 link	c.3278G>T	p.Trp1093Leu	missense_variant	Exon 39 of 39	5		ENSP00000409374.2	P54289-1H0Y715
CACNA2D1	ENST00000705962.1 link	c.3122G>T	p.Trp1041Leu	missense_variant	Exon 38 of 38			ENSP00000516190.1	A0A994J595
CACNA2D1	ENST00000705961.1 link	c.3008G>T	p.Trp1003Leu	missense_variant	Exon 37 of 37			ENSP00000516189.1	A0A994J5M8

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000797

AC:

AN:

250884

Hom.:

AF XY:

0.0000148

AC XY:

AN XY:

135564

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:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000363

AC:

AN:

1461214

Hom.:

Cov.:

AF XY:

0.0000316

AC XY:

AN XY:

726910

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:

0.0000477

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Brugada syndrome

Uncertain:1

Jun 27, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬¨‚Ä†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 (rs773980191, gnomAD 0.002%). This sequence change replaces tryptophan, which is neutral and slightly polar, with leucine, which is neutral and non-polar, at codon 1081 of the CACNA2D1 protein (p.Trp1081Leu). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Uncertain

0.14

BayesDel_noAF

Uncertain

-0.020

CADD

Uncertain

DANN

Uncertain

0.98

DEOGEN2

Benign

0.20

.;T

Eigen

Uncertain

0.51

Eigen_PC

Uncertain

0.54

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.93

D;D

M_CAP

Benign

0.025

MetaRNN

Uncertain

0.52

D;D

MetaSVM

Benign

-0.94

MutationAssessor

Benign

1.9

.;L

PrimateAI

Uncertain

0.60

PROVEAN

Benign

-2.1

N;N

REVEL

Benign

0.25

Sift

Uncertain

0.0080

D;D

Sift4G

Uncertain

0.015

D;D

Polyphen

0.82

P;.

Vest4

0.60

MVP

0.33

MPC

0.84

ClinPred

0.76

GERP RS

5.0

Varity_R

0.35

gMVP

0.75

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