Genetic Variant NM_006030.4:c.3099-8G>A (chr3-50365192-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_006030.4(CACNA2D2):c.3099-8G>A variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,459,400 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

CACNA2D2
NM_006030.4 splice_region, intron

Scores

Splicing: ADA: 0.0007736

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.878

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: Ambry Genetics, Labcorp Genetics (formerly Invitae)
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: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.67).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CACNA2D2	NM_006030.4 link	c.3099-8G>A		splice_region_variant, intron_variant	Intron 35 of 37	ENST00000424201.7	NP_006021.2	Q9NY47-2

Ensembl

Gene	Transcript	HGVSc	Effect	Exon rank	TSL	MANE	Protein	UniProt
CACNA2D2	ENST00000424201.7 link	c.3099-8G>A	splice_region_variant, intron_variant	Intron 35 of 37	1	NM_006030.4	ENSP00000390329.2	Q9NY47-2
CACNA2D2	ENST00000423994.6 link	c.3123-8G>A	splice_region_variant, intron_variant	Intron 36 of 38	5		ENSP00000407393.2	C9JVC9
CACNA2D2	ENST00000266039.7 link	c.3099-8G>A	splice_region_variant, intron_variant	Intron 35 of 37	1		ENSP00000266039.3	Q9NY47-3
CACNA2D2	ENST00000360963.7 link	c.2892-8G>A	splice_region_variant, intron_variant	Intron 35 of 37	1		ENSP00000354228.3	Q9NY47-4
ENSG00000272104	ENST00000606589.1 link	c.128-1105C>T	intron_variant	Intron 2 of 3	3		ENSP00000476225.1	U3KQU4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000415

AC:

AN:

240706

AF XY:

0.00000753

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000292

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1459400

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726034

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33432

American (AMR)

AF:

0.0000224

AC:

AN:

44592

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26090

East Asian (EAS)

AF:

0.00

AC:

AN:

39680

South Asian (SAS)

AF:

0.00

AC:

AN:

86222

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51850

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5748

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111472

Other (OTH)

AF:

0.00

AC:

AN:

60314

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.625

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.67

CADD

Benign

6.0

(source)

DANN

Benign

0.90

PhyloP100

-0.88

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00077

dbscSNV1_RF

Benign

0.13

SpliceAI score (max)

0.050

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

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over