Genetic Variant CACNA2D2:p.Pro1131Pro (chr3-50364705-C-T) – ACMG Classification: Benign (-21 pts)

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_006030.4(CACNA2D2):c.3393G>A(p.Pro1131Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000989 in 1,544,338 control chromosomes in the GnomAD database, including 14 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★). Synonymous variant affecting the same amino acid position (i.e. P1131P) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0051 ( 10 hom., cov: 33)

Exomes 𝑓: 0.00054 ( 4 hom. )

Consequence

CACNA2D2
NM_006030.4 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: -1.07

Publications

0 publications found

Variant links:

Genes affected

CACNA2D2 (HGNC:1400): (calcium voltage-gated channel auxiliary subunit alpha2delta 2) Calcium channels mediate the entry of calcium ions into the cell upon membrane polarization. This gene encodes the alpha-2/delta subunit of the voltage-dependent calcium channel complex. The complex consists of the main channel-forming subunit alpha-1, and auxiliary subunits alpha-2/delta, beta, and gamma. The auxiliary subunits function in the assembly and membrane localization of the complex, and modulate calcium currents and channel activation/inactivation kinetics. The subunit encoded by this gene undergoes post-translational cleavage to yield the extracellular alpha2 peptide and a membrane-anchored delta polypeptide. This subunit is a receptor for the antiepileptic drug, gabapentin. Mutations in this gene are associated with early infantile epileptic encephalopathy. Single nucleotide polymorphisms in this gene are correlated with increased sensitivity to opioid drugs. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Mar 2014]

CACNA2D2 Gene-Disease associations (from GenCC):

cerebellar atrophy with seizures and variable developmental delay
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
complex neurodevelopmental disorder
Inheritance: AR Classification: MODERATE Submitted by: ClinGen

CACNA2D2 links:

ENSG00000272104 (HGNC:):

ENSG00000272104 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.49).

BP6

Variant 3-50364705-C-T is Benign according to our data. Variant chr3-50364705-C-T is described in ClinVar as Benign. ClinVar VariationId is 240278.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-1.07 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00512 (780/152274) while in subpopulation AFR AF = 0.0175 (726/41566). AF 95% confidence interval is 0.0164. There are 10 homozygotes in GnomAd4. There are 358 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 10 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006030.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
CACNA2D2	NM_006030.4	MANE Select	c.3393G>A	p.Pro1131Pro	synonymous	Exon 38 of 38	NP_006021.2	Q9NY47-2
CACNA2D2	NM_001174051.3		c.3414G>A	p.Pro1138Pro	synonymous	Exon 39 of 39	NP_001167522.1	Q9NY47-1
CACNA2D2	NM_001005505.3		c.3399G>A	p.Pro1133Pro	synonymous	Exon 38 of 38	NP_001005505.1	Q9NY47-3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
CACNA2D2	ENST00000424201.7	TSL:1 MANE Select	c.3393G>A	p.Pro1131Pro	synonymous	Exon 38 of 38	ENSP00000390329.2	Q9NY47-2
CACNA2D2	ENST00000423994.6	TSL:5	c.3423G>A	p.Pro1141Pro	synonymous	Exon 39 of 39	ENSP00000407393.2	C9JVC9
CACNA2D2	ENST00000479441.1	TSL:1	c.3414G>A	p.Pro1138Pro	synonymous	Exon 39 of 39	ENSP00000418081.1	Q9NY47-1

Frequencies

GnomAD3 genomes

AF:

0.00509

AC:

775

AN:

152156

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0174

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00242

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00637

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00527

GnomAD2 exomes

AF:

0.00124

AC:

190

AN:

152734

AF XY:

0.00103

show subpopulations

Gnomad AFR exome

AF:

0.0173

Gnomad AMR exome

AF:

0.00174

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000338

Gnomad OTH exome

AF:

0.000462

GnomAD4 exome

AF:

0.000537

AC:

747

AN:

1392064

Hom.:

Cov.:

AF XY:

0.000528

AC XY:

362

AN XY:

686250

show subpopulations

African (AFR)

AF:

0.0170

AC:

532

AN:

31264

American (AMR)

AF:

0.00176

AC:

AN:

34572

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

24896

East Asian (EAS)

AF:

0.00

AC:

AN:

35634

South Asian (SAS)

AF:

0.0000757

AC:

AN:

79272

European-Finnish (FIN)

AF:

0.00

AC:

AN:

48198

Middle Eastern (MID)

AF:

0.00206

AC:

AN:

4366

European-Non Finnish (NFE)

AF:

0.0000660

AC:

AN:

1076296

Other (OTH)

AF:

0.00118

AC:

AN:

57566

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.497

Heterozygous variant carriers

135

180

225

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

110

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00512

AC:

780

AN:

152274

Hom.:

Cov.:

AF XY:

0.00481

AC XY:

358

AN XY:

74460

show subpopulations

African (AFR)

AF:

0.0175

AC:

726

AN:

41566

American (AMR)

AF:

0.00242

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5174

South Asian (SAS)

AF:

0.000207

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00685

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.0000441

AC:

AN:

68010

Other (OTH)

AF:

0.00521

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.504

Heterozygous variant carriers

124

165

206

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000269

Hom.:

Bravo

AF:

0.00582

Asia WGS

AF:

0.00115

AC:

AN:

3478

ClinVar

ClinVar submissions as Germline

Significance:Benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (2)

Developmental and epileptic encephalopathy (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.49

CADD

Benign

4.8

(source)

DANN

Benign

0.70

PhyloP100

-1.1

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over