rs1317078806

Positions:

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 3P and 7B. PM2PP2BP4_ModerateBP6BS1

The NM_006030.4(CACNA2D2):c.17G>C(p.Arg6Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000204 in 146,866 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

CACNA2D2
NM_006030.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:1

Conservation

PhyloP100: -0.797

Variant links:

Genes affected

CACNA2D2 (HGNC:1400): (calcium voltage-gated channel auxiliary subunit alpha2delta 2) Calcium channels mediate the entry of calcium ions into the cell upon membrane polarization. This gene encodes the alpha-2/delta subunit of the voltage-dependent calcium channel complex. The complex consists of the main channel-forming subunit alpha-1, and auxiliary subunits alpha-2/delta, beta, and gamma. The auxiliary subunits function in the assembly and membrane localization of the complex, and modulate calcium currents and channel activation/inactivation kinetics. The subunit encoded by this gene undergoes post-translational cleavage to yield the extracellular alpha2 peptide and a membrane-anchored delta polypeptide. This subunit is a receptor for the antiepileptic drug, gabapentin. Mutations in this gene are associated with early infantile epileptic encephalopathy. Single nucleotide polymorphisms in this gene are correlated with increased sensitivity to opioid drugs. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Mar 2014]

CACNA2D2 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), CACNA2D2. . Gene score misZ 2.9999 (greater than the threshold 3.09). Trascript score misZ 3.123 (greater than threshold 3.09). GenCC has associacion of gene with cerebellar atrophy with seizures and variable developmental delay, complex neurodevelopmental disorder.

BP4

Computational evidence support a benign effect (MetaRNN=0.09705219).

BP6

Variant 3-50503407-C-G is Benign according to our data. Variant chr3-50503407-C-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 461303.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=1}.

BS1

Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.000204 (30/146866) while in subpopulation EAS AF= 0.000809 (4/4942). AF 95% confidence interval is 0.000431. There are 0 homozygotes in gnomad4. There are 14 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CACNA2D2	NM_006030.4 linkuse as main transcript	c.17G>C	p.Arg6Pro	missense_variant	1/38	ENST00000424201.7	NP_006021.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CACNA2D2	ENST00000424201.7 linkuse as main transcript	c.17G>C	p.Arg6Pro	missense_variant	1/38	1	NM_006030.4	ENSP00000390329	P4	Q9NY47-2

Frequencies

GnomAD3 genomes

AF:

0.000204

AC:

AN:

146776

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000622

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000676

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000806

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

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

71468

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

38268

Gnomad4 AFR exome

AF:

0.00

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:

0.000204

AC:

AN:

146866

Hom.:

Cov.:

AF XY:

0.000196

AC XY:

AN XY:

71518

show subpopulations

Gnomad4 AFR

AF:

0.000621

Gnomad4 AMR

AF:

0.0000675

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000809

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.000174

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Early infantile epileptic encephalopathy with suppression bursts

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 21, 2023

This sequence change replaces arginine, which is basic and polar, with proline, which is neutral and non-polar, at codon 6 of the CACNA2D2 protein (p.Arg6Pro). This variant is present in population databases (no rsID available, gnomAD 0.2%). This variant has not been reported in the literature in individuals affected with CACNA2D2-related conditions. ClinVar contains an entry for this variant (Variation ID: 461303). Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Cerebellar atrophy with seizures and variable developmental delay

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

3billion

Sep 20, 2024

The homozygous variant was found in patients diagnosed with another variant in a different gene, with no symptoms related to the gene containing the homozygous variant. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.091

BayesDel_addAF

Benign

-0.53

BayesDel_noAF

Benign

-0.63

CADD

Benign

DANN

Benign

0.90

DEOGEN2

Benign

0.0073

.;T;.;.;T

Eigen

Benign

-0.92

Eigen_PC

Benign

-0.93

FATHMM_MKL

Benign

0.15

LIST_S2

Benign

0.74

T;T;T;T;T

M_CAP

Pathogenic

0.30

MetaRNN

Benign

0.097

T;T;T;T;T

MetaSVM

Benign

-0.95

MutationAssessor

Benign

1.1

.;.;L;L;L

MutationTaster

Benign

1.0

D;N;N;N;N;N;N;N

PrimateAI

Pathogenic

0.88

PROVEAN

Benign

-0.45

N;N;N;N;N

REVEL

Benign

0.040

Sift

Benign

0.056

T;T;T;T;D

Sift4G

Benign

0.25

T;T;T;T;T

Polyphen

0.0

.;.;.;B;B

Vest4

0.21

MutPred

0.30

Loss of MoRF binding (P = 0);Loss of MoRF binding (P = 0);Loss of MoRF binding (P = 0);Loss of MoRF binding (P = 0);Loss of MoRF binding (P = 0);

MVP

0.068

MPC

0.24

ClinPred

0.097

GERP RS

-3.4

Varity_R

0.19

gMVP

0.41

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