Genetic Variant CACNA2D1:c.527-3T>A (chr7-82084903-A-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_000722.4(CACNA2D1):c.527-3T>A variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000686 in 1,458,436 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

CACNA2D1
NM_000722.4 splice_region, intron

Scores

Splicing: ADA: 0.2475

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.86

Publications

0 publications found

Variant links:

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
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
Inheritance: Unknown, AD Classification: LIMITED, NO_KNOWN Submitted by: Genomics England PanelApp, Ambry Genetics
Brugada syndrome 1
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

CACNA2D1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.31).

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

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
CACNA2D1	NM_000722.4	MANE Select	c.527-3T>A	splice_region intron	N/A	NP_000713.2	P54289-2
CACNA2D1	NM_001366867.1		c.527-3T>A	splice_region intron	N/A	NP_001353796.1	P54289-1
CACNA2D1	NM_001302890.2		c.527-3T>A	splice_region intron	N/A	NP_001289819.1	E7ERK3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
CACNA2D1	ENST00000356860.8	TSL:1 MANE Select	c.527-3T>A	splice_region intron	N/A	ENSP00000349320.3	P54289-2
CACNA2D1	ENST00000423588.1	TSL:1	c.527-3T>A	splice_region intron	N/A	ENSP00000405395.1	E7ERK3
CACNA2D1	ENST00000443883.2	TSL:5	c.527-3T>A	splice_region intron	N/A	ENSP00000409374.2	H0Y715

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.86e-7

AC:

AN:

1458436

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

725808

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33418

American (AMR)

AF:

0.00

AC:

AN:

44704

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26122

East Asian (EAS)

AF:

0.00

AC:

AN:

39662

South Asian (SAS)

AF:

0.00

AC:

AN:

86122

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53406

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

9.02e-7

AC:

AN:

1108962

Other (OTH)

AF:

0.00

AC:

AN:

60274

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.31

CADD

Benign

(source)

DANN

Benign

0.89

PhyloP100

1.9

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.25

dbscSNV1_RF

Benign

0.37

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over