3-53495207-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_000720.4(CACNA1D):c.41G>A(p.Arg14Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,296 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 Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R14W) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: CACNA1D NM_000720.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.98

Genes affected

CACNA1D (HGNC:1391): (calcium voltage-gated channel subunit alpha1 D) Voltage-dependent calcium channels mediate the entry of calcium ions into excitable cells, and are also involved in a variety of calcium-dependent processes, including muscle contraction, hormone or neurotransmitter release, and gene expression. Calcium channels are multisubunit complexes composed of alpha-1, beta, alpha-2/delta, and gamma subunits. The channel activity is directed by the pore-forming alpha-1 subunit, whereas the others act as auxiliary subunits regulating this activity. The distinctive properties of the calcium channel types are related primarily to the expression of a variety of alpha-1 isoforms, namely alpha-1A, B, C, D, E, and S. This gene encodes the alpha-1D subunit. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2012]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, CACNA1D
• BP4: Computational evidence support a benign effect (MetaRNN=0.18624839).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CACNA1D	NM_000720.4	c.41G>A	p.Arg14Gln	missense_variant	1/49	ENST00000288139.11
CACNA1D	NM_001128840.3	c.41G>A	p.Arg14Gln	missense_variant	1/48	ENST00000350061.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CACNA1D	ENST00000288139.11	c.41G>A	p.Arg14Gln	missense_variant	1/49	1	NM_000720.4	P2
CACNA1D	ENST00000350061.11	c.41G>A	p.Arg14Gln	missense_variant	1/48	1	NM_001128840.3

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD3 exomes AF: 0.00000402 AC: 1 AN: 248688 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 134762

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000900

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461296 Hom.: 0 Cov.: 34 AF XY: 0.00000138 AC XY: 1 AN XY: 726946

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: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

Bravo AF: 0.00000378

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Sep 29, 2021

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. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. This variant has not been reported in the literature in individuals affected with CACNA1D-related conditions. This variant is present in population databases (rs776581643, ExAC 0.002%). This sequence change replaces arginine with glutamine at codon 14 of the CACNA1D protein (p.Arg14Gln). The arginine residue is weakly conserved and there is a small physicochemical difference between arginine and glutamine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.061
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Uncertain	-0.030
Cadd	Pathogenic	27
Dann	Pathogenic	1.0
DEOGEN2	Benign	0.11	T;.;.;.;.;.;.
Eigen	Benign	-0.10
Eigen_PC	Benign	0.060
FATHMM_MKL	Benign	0.66	D
LIST_S2	Uncertain	0.94	D;D;.;D;D;D;D
M_CAP	Benign	0.031	D
MetaRNN	Benign	0.19	T;T;T;T;T;T;T
MetaSVM	Uncertain	0.15	D
MutationAssessor	Benign	0.55	N;.;N;N;N;.;.
MutationTaster	Benign	0.98	N;N;N
PrimateAI	Uncertain	0.62	T
PROVEAN	Benign	-0.55	N;.;.;N;N;.;.
REVEL	Uncertain	0.29
Sift	Pathogenic	0.0	D;.;.;D;D;.;.
Sift4G	Benign	0.23	T;.;.;T;T;.;.
Polyphen		0.11	B;.;B;B;.;.;.
Vest4		0.34
MutPred		0.33		Gain of helix (P = 0.0034);Gain of helix (P = 0.0034);Gain of helix (P = 0.0034);Gain of helix (P = 0.0034);Gain of helix (P = 0.0034);Gain of helix (P = 0.0034);.;
MVP		0.74
MPC		0.92
ClinPred		0.57	D
GERP RS		3.8
Varity_R		0.29
gMVP		0.50

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

Other links and lift over

dbSNP: rs776581643; hg19: chr3-53529234;