NM_006030.4:c.669T>C

Variant names:

Variant summary

Our verdict is Benign. The variant received -17 ACMG points: 0P and 17B. BP4_StrongBP6_Very_StrongBP7BS1

The NM_006030.4(CACNA2D2):c.669T>C(p.Asn223Asn) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000238 in 1,584,188 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 Likely benign (★★).

Frequency

Genomes: 𝑓 0.00030 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00023 ( 0 hom. )

Consequence

CACNA2D2
NM_006030.4 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: 0.260

Publications

1 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: Ambry Genetics, Labcorp Genetics (formerly Invitae)
complex neurodevelopmental disorder
Inheritance: AR Classification: MODERATE Submitted by: ClinGen

CACNA2D2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -17 ACMG points.

BP4

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

BP6

Variant 3-50381110-A-G is Benign according to our data. Variant chr3-50381110-A-G is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 416547.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=0.26 with no splicing effect.

BS1

Variant frequency is greater than expected in population amr. GnomAd4 allele frequency = 0.000297 (45/151450) while in subpopulation AMR AF = 0.00059 (9/15260). AF 95% confidence interval is 0.000307. There are 0 homozygotes in GnomAd4. There are 25 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CACNA2D2	NM_006030.4 link	c.669T>C	p.Asn223Asn	synonymous_variant	Exon 7 of 38	ENST00000424201.7	NP_006021.2	Q9NY47-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CACNA2D2	ENST00000424201.7 link	c.669T>C	p.Asn223Asn	synonymous_variant	Exon 7 of 38	1	NM_006030.4	ENSP00000390329.2	Q9NY47-2
CACNA2D2	ENST00000423994.6 link	c.669T>C	p.Asn223Asn	synonymous_variant	Exon 7 of 39	5		ENSP00000407393.2	C9JVC9
CACNA2D2	ENST00000266039.7 link	c.669T>C	p.Asn223Asn	synonymous_variant	Exon 7 of 38	1		ENSP00000266039.3	Q9NY47-3
CACNA2D2	ENST00000360963.7 link	c.462T>C	p.Asn154Asn	synonymous_variant	Exon 7 of 38	1		ENSP00000354228.3	Q9NY47-4

Frequencies

GnomAD3 genomes

AF:

0.000291

AC:

AN:

151332

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000243

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000591

Gnomad ASJ

AF:

0.00231

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.000280

Gnomad OTH

AF:

0.00241

GnomAD2 exomes

AF:

0.000458

AC:

115

AN:

251146

AF XY:

0.000472

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000868

Gnomad ASJ exome

AF:

0.00348

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000352

Gnomad OTH exome

AF:

0.00131

GnomAD4 exome

AF:

0.000232

AC:

332

AN:

1432738

Hom.:

Cov.:

AF XY:

0.000223

AC XY:

159

AN XY:

712922

show subpopulations

African (AFR)

AF:

0.000335

AC:

AN:

32830

American (AMR)

AF:

0.000843

AC:

AN:

43876

Ashkenazi Jewish (ASJ)

AF:

0.00338

AC:

AN:

25140

East Asian (EAS)

AF:

0.00

AC:

AN:

37656

South Asian (SAS)

AF:

0.0000698

AC:

AN:

85938

European-Finnish (FIN)

AF:

0.00

AC:

AN:

49432

Middle Eastern (MID)

AF:

0.00513

AC:

AN:

5650

European-Non Finnish (NFE)

AF:

0.000116

AC:

127

AN:

1093686

Other (OTH)

AF:

0.000632

AC:

AN:

58530

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.474

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

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

GnomAD4 genome

AF:

0.000297

AC:

AN:

151450

Hom.:

Cov.:

AF XY:

0.000338

AC XY:

AN XY:

74048

show subpopulations

African (AFR)

AF:

0.0000242

AC:

AN:

41326

American (AMR)

AF:

0.000590

AC:

AN:

15260

Ashkenazi Jewish (ASJ)

AF:

0.00231

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5102

South Asian (SAS)

AF:

0.00

AC:

AN:

4764

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10442

Middle Eastern (MID)

AF:

0.0102

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000280

AC:

AN:

67788

Other (OTH)

AF:

0.00238

AC:

AN:

2098

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.513

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

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:

0.000491

Hom.:

Bravo

AF:

0.000291

EpiCase

AF:

0.000818

EpiControl

AF:

0.000712

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Apr 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

CACNA2D2: BP4, BP7 -

not specified

Benign:1

Feb 11, 2020

Athena Diagnostics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Developmental and epileptic encephalopathy

Benign:1

Jan 11, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Cerebellar atrophy with seizures and variable developmental delay

Benign:1

Aug 27, 2024

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.49

CADD

Benign

3.9

(source)

DANN

Benign

0.65

PhyloP100

0.26

Mutation Taster

=94/6

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over