12-2293080-A-T

Variant names:

• chr12-2293080-A-T
• rs1024582
• NM_000719.7:c.478-155896A>T

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BS1 BS2

The NM_000719.7(CACNA1C):​c.478-155896A>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000125 in 152,110 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.00012 (1 hom., cov: 31)
• Consequence: CACNA1C NM_000719.7 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.743
• Publications: 35 publications found

Genes affected

CACNA1C (HGNC:1390): (calcium voltage-gated channel subunit alpha1 C) This gene encodes an alpha-1 subunit of a voltage-dependent calcium channel. Calcium channels mediate the influx of calcium ions into the cell upon membrane polarization. The alpha-1 subunit consists of 24 transmembrane segments and forms the pore through which ions pass into the cell. The calcium channel consists of a complex of alpha-1, alpha-2/delta, beta, and gamma subunits in a 1:1:1:1 ratio. There are multiple isoforms of each of these proteins, either encoded by different genes or the result of alternative splicing of transcripts. The protein encoded by this gene binds to and is inhibited by dihydropyridine. Alternative splicing results in many transcript variants encoding different proteins. Some of the predicted proteins may not produce functional ion channel subunits. [provided by RefSeq, Oct 2012]

CACNA1C-IT3 (HGNC:41314): (CACNA1C intronic transcript 3)

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BS1: Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.000125 (19/152110) while in subpopulation EAS AF = 0.00252 (13/5168). AF 95% confidence interval is 0.00149. There are 1 homozygotes in GnomAd4. There are 11 alleles in the male GnomAd4 subpopulation. Median coverage is 31. This position passed quality control check.
• BS2: High AC in GnomAd4 at 19 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000719.7. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNA1C	NM_000719.7	MANE Select	c.478-155896A>T		intron	N/A	NP_000710.5
	CACNA1C	NM_001167623.2	MANE Plus Clinical	c.478-155896A>T		intron	N/A	NP_001161095.1	Q13936-37
	CACNA1C	NM_199460.4		c.478-155896A>T		intron	N/A	NP_955630.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNA1C	ENST00000399603.6	TSL:5 MANE Plus Clinical	c.478-155896A>T		intron	N/A	ENSP00000382512.1	Q13936-37
	CACNA1C	ENST00000399655.6	TSL:1 MANE Select	c.478-155896A>T		intron	N/A	ENSP00000382563.1	Q13936-12
	CACNA1C	ENST00000682544.1		c.568-155896A>T		intron	N/A	ENSP00000507184.1	A0A804HIR0

Frequencies

GnomAD3 genomes AF: 0.000125 AC: 19 AN: 151992 Hom.: 1 Cov.: 31

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00251

Gnomad SAS AF: 0.00104

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

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

GnomAD4 genome AF: 0.000125 AC: 19 AN: 152110 Hom.: 1 Cov.: 31 AF XY: 0.000148 AC XY: 11 AN XY: 74324

African (AFR) AF: 0.00 AC: 0 AN: 41510

American (AMR) AF: 0.00 AC: 0 AN: 15292

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00252 AC: 13 AN: 5168

South Asian (SAS) AF: 0.00104 AC: 5 AN: 4818

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10548

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 67988

Other (OTH) AF: 0.00 AC: 0 AN: 2110

Alfa AF: 0.00 Hom.: 95295

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	0.92
DANN	Benign	0.66
PhyloP100		-0.74

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

Other links and lift over

dbSNP: rs1024582; hg19: chr12-2402246;