NM_000720.4:c.1208_1209insGGG

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PM2PM4_SupportingPP3PP5_Very_Strong

The NM_000720.4(CACNA1D):c.1208_1209insGGG(p.Gly403dup) variant causes a disruptive inframe insertion change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,460,284 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

CACNA1D
NM_000720.4 disruptive_inframe_insertion

Scores

Not classified

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:4

Conservation

PhyloP100: 10.0

Publications

3 publications found

Variant links:

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]

CACNA1D Gene-Disease associations (from GenCC):

aldosterone-producing adenoma with seizures and neurological abnormalities
Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Illumina, Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
sinoatrial node dysfunction and deafness
Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: PanelApp Australia, Orphanet, G2P, ClinGen, Labcorp Genetics (formerly Invitae)

CACNA1D links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 12 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM4

Nonframeshift variant in NON repetitive region in NM_000720.4. Strenght limited to Supporting due to length of the change: 1aa.

PP3

No computational evidence supports a deleterious effect, but strongly conserved according to phyloP

PP5

Variant 3-53673802-T-TGGG is Pathogenic according to our data. Variant chr3-53673802-T-TGGG is described in ClinVar as Pathogenic. ClinVar VariationId is 39709.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CACNA1D	NM_000720.4 link	c.1208_1209insGGG	p.Gly403dup	disruptive_inframe_insertion	Exon 8 of 49	ENST00000288139.11	NP_000711.1	Q01668-2Q59GD8
CACNA1D	NM_001128840.3 link	c.1220+678_1220+679insGGG		intron_variant	Intron 8 of 47	ENST00000350061.11	NP_001122312.1	Q01668-1Q59GD8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CACNA1D	ENST00000288139.11 link	c.1208_1209insGGG	p.Gly403dup	disruptive_inframe_insertion	Exon 8 of 49	1	NM_000720.4	ENSP00000288139.3		Q01668-2
CACNA1D	ENST00000350061.11 link	c.1220+678_1220+679insGGG		intron_variant	Intron 8 of 47	1	NM_001128840.3	ENSP00000288133.5		Q01668-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000795

AC:

AN:

251492

AF XY:

0.00000736

show subpopulations

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000205

AC:

AN:

1460284

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

726578

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33442

American (AMR)

AF:

0.00

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26130

East Asian (EAS)

AF:

0.00

AC:

AN:

39694

South Asian (SAS)

AF:

0.0000348

AC:

AN:

86216

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1110560

Other (OTH)

AF:

0.00

AC:

AN:

60342

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.458

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Sinoatrial node dysfunction and deafness

Pathogenic:3

Neuberg Centre For Genomic Medicine, NCGM

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The variant c.1208_1209insGGG (p.Gly403dup) in CACNA1D gene has been reported previously in patients affected with sinoatrial node dysfunction and deafness that segregated with disease in the family (Baig et al., 2011). This variant has been reported to the ClinVar database as Pathogenic. The p.Gly403dup variant is reported with the allele frequency (0.0007%) in the gnomAD Exomes and is novel (not in any individuals) in 1000 Genomes. This p.Gly403dup causes duplication of amino acid Glycine at postion 403. Alleles of single nucleotide polymorphisms (SNPs) from the CACNA1D locus have revealed the same c.1208_1209insGGG associated haplotype in three families, compatible with a founder mutation inherited from a common ancestor (Baig et al., 2011). For these reasons, this variant has been classified as Pathogenic. -

Jan 01, 2011

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

University of Washington Center for Mendelian Genomics, University of Washington

Significance:Likely pathogenic

Review Status:no assertion criteria provided

Collection Method:research

- -

not provided

Pathogenic:1

Dec 24, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant, c.1208_1209insGGG, results in the insertion of 1 amino acid(s) of the CACNA1D protein (p.Gly403dup), but otherwise preserves the integrity of the reading frame. This variant is present in population databases (rs751923238, gnomAD 0.006%). This variant has been observed in individual(s) with autosomal recessive sinoatrial node dysfunction and deafness (PMID: 21131953, 30498240). It has also been observed to segregate with disease in related individuals. This variant is also known as p.403_404insGly. ClinVar contains an entry for this variant (Variation ID: 39709). For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

Mutation Taster

=17/83

disease causing (ClinVar)

(source)

Splicing

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

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over