Genetic Variant CACNA2D3:p.Pro4Ser (chr3-54122723-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_018398.3(CACNA2D3):c.10C>T(p.Pro4Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000208 in 1,199,900 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.000093 ( 0 hom., cov: 29)

Exomes 𝑓: 0.000010 ( 0 hom. )

Consequence

CACNA2D3
NM_018398.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.370

Variant links:

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]

CACNA2D3 links:

ENSG00000286353 (HGNC:):

ENSG00000286353 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.06748229).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CACNA2D3	NM_018398.3 link	c.10C>T	p.Pro4Ser	missense_variant	Exon 1 of 38	ENST00000474759.6	NP_060868.2	Q8IZS8-1
LOC124909381	XR_007095914.1 link	n.386+334G>A		intron_variant	Intron 1 of 1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CACNA2D3	ENST00000474759.6 link	c.10C>T	p.Pro4Ser	missense_variant	Exon 1 of 38	1	NM_018398.3	ENSP00000419101.1		Q8IZS8-1
ENSG00000286353	ENST00000666932.1 link	n.1187+334G>A		intron_variant	Intron 2 of 2

Frequencies

GnomAD3 genomes

AF:

0.0000932

AC:

AN:

150220

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000341

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.0000105

AC:

AN:

1049680

Hom.:

Cov.:

AF XY:

0.0000101

AC XY:

AN XY:

495306

show subpopulations

Gnomad4 AFR exome

AF:

0.000507

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000932

AC:

AN:

150220

Hom.:

Cov.:

AF XY:

0.0000818

AC XY:

AN XY:

73340

show subpopulations

Gnomad4 AFR

AF:

0.000341

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000907

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 31, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.10C>T (p.P4S) alteration is located in exon 1 (coding exon 1) of the CACNA2D3 gene. This alteration results from a C to T substitution at nucleotide position 10, causing the proline (P) at amino acid position 4 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.077

BayesDel_addAF

Benign

-0.30

BayesDel_noAF

Benign

-0.66

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.059

T;T;T

Eigen

Benign

-0.34

Eigen_PC

Benign

-0.18

FATHMM_MKL

Benign

0.41

LIST_S2

Benign

0.50

.;T;.

M_CAP

Pathogenic

0.33

MetaRNN

Benign

0.067

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.0

N;N;N

PrimateAI

Pathogenic

0.80

PROVEAN

Benign

-0.31

N;N;N

REVEL

Benign

0.031

Sift

Benign

0.50

T;T;T

Sift4G

Pathogenic

0.0

D;D;D

Polyphen

0.0020

B;B;B

Vest4

0.096

MutPred

0.24

Gain of phosphorylation at P4 (P = 0.0084);Gain of phosphorylation at P4 (P = 0.0084);Gain of phosphorylation at P4 (P = 0.0084);

MVP

0.068

MPC

0.27

ClinPred

0.34

GERP RS

3.2

Varity_R

0.063

gMVP

0.21

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over