chr7-81968948-C-A

Variant names:

• chr7-81968948-C-A
• rs368512946
• NM_000722.4:c.2334G>T

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Moderate BP6_Moderate BP7

The NM_000722.4(CACNA2D1):​c.2334G>T​(p.Ser778Ser) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000278 in 1,439,820 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★). Synonymous variant affecting the same amino acid position (i.e. S778S) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000028 (0 hom.)
• Consequence: CACNA2D1 NM_000722.4 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -1.41
• Publications: 0 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: 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=-0.42).
• BP6: Variant 7-81968948-C-A is Benign according to our data. Variant chr7-81968948-C-A is described in ClinVar as Likely_benign. ClinVar VariationId is 4217929.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-1.41 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000722.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNA2D1	NM_000722.4	MANE Select	c.2334G>T	p.Ser778Ser	synonymous	Exon 29 of 39	NP_000713.2
	CACNA2D1	NM_001366867.1		c.2370G>T	p.Ser790Ser	synonymous	Exon 29 of 39	NP_001353796.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNA2D1	ENST00000356860.8	TSL:1 MANE Select	c.2334G>T	p.Ser778Ser	synonymous	Exon 29 of 39	ENSP00000349320.3
	CACNA2D1	ENST00000443883.2	TSL:5	c.2370G>T	p.Ser790Ser	synonymous	Exon 29 of 39	ENSP00000409374.2
	CACNA2D1	ENST00000705962.1		c.2214G>T	p.Ser738Ser	synonymous	Exon 28 of 38	ENSP00000516190.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000278 AC: 4 AN: 1439820 Hom.: 0 Cov.: 26 AF XY: 0.00000139 AC XY: 1 AN XY: 717444

African (AFR) AF: 0.00 AC: 0 AN: 32986

American (AMR) AF: 0.00 AC: 0 AN: 44602

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25764

East Asian (EAS) AF: 0.00 AC: 0 AN: 39424

South Asian (SAS) AF: 0.00 AC: 0 AN: 85026

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52902

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5702

European-Non Finnish (NFE) AF: 0.00000366 AC: 4 AN: 1093902

Other (OTH) AF: 0.00 AC: 0 AN: 59512

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Cardiovascular phenotype Benign:1

Aug 03, 2025

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.42
CADD	Benign	3.3
DANN	Benign	0.60
PhyloP100		-1.4

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: rs368512946; hg19: chr7-81598264;