chr3-50364974-G-A

Position:

• chr3-50364974-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 3P and 3B. PM2 PP2 BP4 BP6_Moderate

The ENST00000266039.7(CACNA2D2):​c.3211C>T​(p.Pro1071Ser) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.00000205 in 1,460,472 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 9/14 in silico tools predict a benign outcome for this variant. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: CACNA2D2 ENST00000266039.7 missense, splice_region
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 3.75

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]

LOC127898564 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), CACNA2D2. . Gene score misZ 2.9999 (greater than the threshold 3.09). Trascript score misZ 3.1029 (greater than threshold 3.09). GenCC has associacion of gene with cerebellar atrophy with seizures and variable developmental delay, complex neurodevelopmental disorder.
• BP4: Computational evidence support a benign effect (MetaRNN=0.40414998).
• BP6: Variant 3-50364974-G-A is Benign according to our data. Variant chr3-50364974-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 416549.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CACNA2D2	NM_006030.4	c.3209-4C>T		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		ENST00000424201.7	NP_006021.2
LOC127898564	NR_183066.1	n.835-1323G>A		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CACNA2D2	ENST00000424201.7	c.3209-4C>T		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		1	NM_006030.4	ENSP00000390329	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000815 AC: 2 AN: 245478 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 133922

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000580

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: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1460472 Hom.: 0 Cov.: 34 AF XY: 0.00000138 AC XY: 1 AN XY: 726530

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000447

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: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Early infantile epileptic encephalopathy with suppression bursts Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 03, 2020

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.24	T
BayesDel_noAF	Benign	-0.41
CADD	Benign	18
DANN	Uncertain	0.98
Eigen	Uncertain	0.37
Eigen_PC	Uncertain	0.37
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Benign	0.53	T;T;T
M_CAP	Pathogenic	0.62	D
MetaRNN	Benign	0.40	T;T;T
MetaSVM	Benign	-0.91	T
MutationTaster	Benign	1.0	D;D;D;D;D;N;N;N
PROVEAN	Benign	-0.17	N;N;N
REVEL	Benign	0.12
Sift	Benign	0.28	T;T;T
Sift4G	Benign	0.39	T;T;T
Vest4		0.40
MutPred		0.26		Gain of helix (P = 0.132);.;.;
MVP		0.21
ClinPred		0.24	T
GERP RS		4.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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

Other links and lift over

dbSNP: rs1060504834; hg19: chr3-50402405;