3-54386694-GTTTTTTTTTTT-GTTTTT

Variant names:

• chr3-54386694-GTTTTTT-G
• rs62967361
• NM_018398.3:c.322-8_322-3delTTTTTT

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_018398.3(CACNA2D3):​c.322-8_322-3delTTTTTT variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000941 in 1,275,502 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 21)
  • Exomes 𝑓: 0.0000094 (0 hom.)
• Consequence: CACNA2D3 NM_018398.3 splice_region, intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.03
• Publications: 0 publications found

Genes affected

CACNA2D3 (HGNC:15460): (calcium voltage-gated channel auxiliary subunit alpha2delta 3) This gene encodes a member of the alpha-2/delta subunit family, a protein in the voltage-dependent calcium channel complex. Calcium channels mediate the influx of calcium ions into the cell upon membrane polarization and consist of a complex of alpha-1, alpha-2/delta, beta, and gamma subunits in a 1:1:1:1 ratio. Various versions of each of these subunits exist, either expressed from similar genes or the result of alternative splicing. Research on a highly similar protein in rabbit suggests the protein described in this record is cleaved into alpha-2 and delta subunits. Alternate transcriptional splice variants of this gene have been observed but have not been thoroughly characterized. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_018398.3. 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
	CACNA2D3	NM_018398.3	MANE Select	c.322-8_322-3delTTTTTT		splice_region intron	N/A	NP_060868.2	Q8IZS8-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNA2D3	ENST00000474759.6	TSL:1 MANE Select	c.322-20_322-15delTTTTTT		intron	N/A	ENSP00000419101.1	Q8IZS8-1
	CACNA2D3	ENST00000490478.5	TSL:1	c.40-20_40-15delTTTTTT		intron	N/A	ENSP00000417279.1	Q8IZS8-2
	CACNA2D3	ENST00000468658.1	TSL:1	n.40-20_40-15delTTTTTT		intron	N/A	ENSP00000417455.1	F8WAV4

Frequencies

GnomAD3 genomes Cov.: 21

GnomAD4 exome AF: 0.00000941 AC: 12 AN: 1275502 Hom.: 0 AF XY: 0.00000795 AC XY: 5 AN XY: 628982

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 27394

American (AMR) AF: 0.0000743 AC: 2 AN: 26900

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 21850

East Asian (EAS) AF: 0.00 AC: 0 AN: 34862

South Asian (SAS) AF: 0.0000305 AC: 2 AN: 65486

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 34904

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4818

European-Non Finnish (NFE) AF: 0.00000696 AC: 7 AN: 1006216

Other (OTH) AF: 0.0000188 AC: 1 AN: 53072

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 21

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		1.0

Splicing

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

Other links and lift over

dbSNP: rs62967361; hg19: chr3-54420721;