chr3-50364714-C-G

Variant names:

• chr3-50364714-C-G
• rs1379269800
• NM_006030.4:c.3384G>C

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_006030.4(CACNA2D2):​c.3384G>C​(p.Pro1128Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000717 in 1,395,386 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. P1128P) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
• Consequence: CACNA2D2 NM_006030.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.40
• Publications: 1 publications found

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

ENSG00000272104 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.54).
• BP7: Synonymous conserved (PhyloP=-1.4 with no splicing effect.

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNA2D2	NM_006030.4	MANE Select	c.3384G>C	p.Pro1128Pro	synonymous	Exon 38 of 38	NP_006021.2	Q9NY47-2
	CACNA2D2	NM_001174051.3		c.3405G>C	p.Pro1135Pro	synonymous	Exon 39 of 39	NP_001167522.1	Q9NY47-1
	CACNA2D2	NM_001005505.3		c.3390G>C	p.Pro1130Pro	synonymous	Exon 38 of 38	NP_001005505.1	Q9NY47-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNA2D2	ENST00000424201.7	TSL:1 MANE Select	c.3384G>C	p.Pro1128Pro	synonymous	Exon 38 of 38	ENSP00000390329.2	Q9NY47-2
	CACNA2D2	ENST00000423994.6	TSL:5	c.3414G>C	p.Pro1138Pro	synonymous	Exon 39 of 39	ENSP00000407393.2	C9JVC9
	CACNA2D2	ENST00000479441.1	TSL:1	c.3405G>C	p.Pro1135Pro	synonymous	Exon 39 of 39	ENSP00000418081.1	Q9NY47-1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 7.17e-7 AC: 1 AN: 1395386 Hom.: 0 Cov.: 32 AF XY: 0.00000145 AC XY: 1 AN XY: 688376

African (AFR) AF: 0.00 AC: 0 AN: 31336

American (AMR) AF: 0.00 AC: 0 AN: 34948

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25012

East Asian (EAS) AF: 0.0000280 AC: 1 AN: 35716

South Asian (SAS) AF: 0.00 AC: 0 AN: 79714

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 48346

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4490

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1078078

Other (OTH) AF: 0.00 AC: 0 AN: 57746

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.54
CADD	Benign	4.0
DANN	Benign	0.60
PhyloP100		-1.4

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs1379269800; hg19: chr3-50402145;