chr3-53495189-AA-TG

Position:

• chr3-53495189-AA-TG

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP2

The NM_000720.4(CACNA1D):​c.23_24delinsTG​(p.Lys8Met) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. 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. K8E) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 31)
• Consequence: CACNA1D NM_000720.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.90

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 3 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), CACNA1D. . Gene score misZ 4.5817 (greater than the threshold 3.09). Trascript score misZ 6.6047 (greater than threshold 3.09). GenCC has associacion of gene with sinoatrial node dysfunction and deafness, aldosterone-producing adenoma with seizures and neurological abnormalities.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CACNA1D	NM_000720.4	c.23_24delinsTG	p.Lys8Met	missense_variant	1/49	ENST00000288139.11
CACNA1D	NM_001128840.3	c.23_24delinsTG	p.Lys8Met	missense_variant	1/48	ENST00000350061.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CACNA1D	ENST00000288139.11	c.23_24delinsTG	p.Lys8Met	missense_variant	1/49	1	NM_000720.4	P2
CACNA1D	ENST00000350061.11	c.23_24delinsTG	p.Lys8Met	missense_variant	1/48	1	NM_001128840.3

Frequencies

GnomAD3 genomes Cov.: 31

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 31

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

Labcorp Genetics (formerly Invitae), Labcorp

Jun 26, 2023

ClinVar contains an entry for this variant (Variation ID: 1948828). 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. Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. This variant has not been reported in the literature in individuals affected with CACNA1D-related conditions. This variant is present in population databases (no rsID available, gnomAD 0.0004%). This sequence change replaces lysine, which is basic and polar, with methionine, which is neutral and non-polar, at codon 8 of the CACNA1D protein (p.Lys8Met). -

Computational scores

Source: dbNSFP v4.3

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr3-53529216;