rs17176546

Variant names:

• chr7-82251598-G-A
• rs17176546
• NM_000722.4:c.295-80989C>T

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BS1 BS2

The NM_000722.4(CACNA2D1):​c.295-80989C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0282 in 152,102 control chromosomes in the GnomAD database, including 88 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.028 (88 hom., cov: 32)
• Consequence: CACNA2D1 NM_000722.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.127
• Publications: 2 publications found

Genes affected

CACNA2D1 (HGNC:1399): (calcium voltage-gated channel auxiliary subunit alpha2delta 1) The preproprotein encoded by this gene is cleaved into multiple chains that comprise the alpha-2 and delta subunits of the voltage-dependent calcium channel complex. Calcium channels mediate the influx of calcium ions into the cell upon membrane polarization. Mutations in this gene can cause cardiac deficiencies, including Brugada syndrome and short QT syndrome. Alternate splicing results in multiple transcript variants, some of which may lack the delta subunit portion. [provided by RefSeq, Nov 2014]

CACNA2D1 Gene-Disease associations (from GenCC):

• short QT syndrome

  Inheritance: AD Classification: SUPPORTIVE, NO_KNOWN Submitted by: ClinGen, Orphanet
• Brugada syndrome

  Inheritance: AD, Unknown Classification: LIMITED, NO_KNOWN Submitted by: Ambry Genetics, Genomics England PanelApp
• genetic developmental and epileptic encephalopathy

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• developmental and epileptic encephalopathy 110

  Inheritance: AR Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P
• Brugada syndrome 1

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.91).
• BS1: Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.0282 (4290/152102) while in subpopulation NFE AF = 0.0416 (2828/67994). AF 95% confidence interval is 0.0403. There are 88 homozygotes in GnomAd4. There are 2055 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.
• BS2: High Homozygotes in GnomAd4 at 88 AD,AR,Unknown gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CACNA2D1	NM_000722.4	c.295-80989C>T		intron_variant	Intron 3 of 38	ENST00000356860.8	NP_000713.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CACNA2D1	ENST00000356860.8	c.295-80989C>T		intron_variant	Intron 3 of 38	1	NM_000722.4	ENSP00000349320.3

Frequencies

GnomAD3 genomes AF: 0.0282 AC: 4287 AN: 151984 Hom.: 87 Cov.: 32

Gnomad AFR AF: 0.00805

Gnomad AMI AF: 0.00659

Gnomad AMR AF: 0.0303

Gnomad ASJ AF: 0.0657

Gnomad EAS AF: 0.000193

Gnomad SAS AF: 0.0152

Gnomad FIN AF: 0.0263

Gnomad MID AF: 0.0190

Gnomad NFE AF: 0.0416

Gnomad OTH AF: 0.0359

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.0282 AC: 4290 AN: 152102 Hom.: 88 Cov.: 32 AF XY: 0.0276 AC XY: 2055 AN XY: 74338

African (AFR) AF: 0.00802 AC: 333 AN: 41508

American (AMR) AF: 0.0302 AC: 461 AN: 15252

Ashkenazi Jewish (ASJ) AF: 0.0657 AC: 228 AN: 3468

East Asian (EAS) AF: 0.000193 AC: 1 AN: 5178

South Asian (SAS) AF: 0.0154 AC: 74 AN: 4812

European-Finnish (FIN) AF: 0.0263 AC: 278 AN: 10574

Middle Eastern (MID) AF: 0.0204 AC: 6 AN: 294

European-Non Finnish (NFE) AF: 0.0416 AC: 2828 AN: 67994

Other (OTH) AF: 0.0355 AC: 75 AN: 2112

Alfa AF: 0.0330 Hom.: 64

Bravo AF: 0.0282

Asia WGS AF: 0.00779 AC: 27 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.91
CADD	Benign	1.6
DANN	Benign	0.53
PhyloP100		0.13
Mutation Taster		=100/0	polymorphism

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

Other links and lift over

dbSNP: rs17176546; hg19: chr7-81880914;