rs758461435

Positions:

• chr12-2606655-G-A
• chr12-2606655-G-C
• chr12-2606655-G-T

Variant summary

Our verdict is Benign. Variant got -17 ACMG points: 0P and 17B. BP4_Strong BP6_Very_Strong BP7 BS2

The NM_000719.7(CACNA1C):​c.3201G>A​(p.Ala1067=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000398 in 1,608,892 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 Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. A1067A) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.000053 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000038 (0 hom.)
• Consequence: CACNA1C NM_000719.7 synonymous
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:3
• Conservation: PhyloP100: -1.34

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-AS3 (HGNC:40117): (CACNA1C antisense RNA 3)

ACMG classification

Verdict is Benign. Variant got -17 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.74).
• BP6: Variant 12-2606655-G-A is Benign according to our data. Variant chr12-2606655-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 308142.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr12-2606655-G-A is described in Lovd as [Likely_benign].
• BP7: Synonymous conserved (PhyloP=-1.34 with no splicing effect.
• BS2: High AC in GnomAd4 at 8 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CACNA1C	NM_000719.7	c.3201G>A	p.Ala1067=	synonymous_variant	25/47	ENST00000399655.6
CACNA1C	NM_001167623.2	c.3201G>A	p.Ala1067=	synonymous_variant	25/47	ENST00000399603.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CACNA1C	ENST00000399603.6	c.3201G>A	p.Ala1067=	synonymous_variant	25/47	5	NM_001167623.2
CACNA1C	ENST00000399655.6	c.3201G>A	p.Ala1067=	synonymous_variant	25/47	1	NM_000719.7
CACNA1C-AS3	ENST00000543559.1	n.20+766C>T		intron_variant, non_coding_transcript_variant		5

Frequencies

GnomAD3 genomes AF: 0.0000526 AC: 8 AN: 152044 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000121

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000208

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.000478

GnomAD3 exomes AF: 0.0000375 AC: 9 AN: 240266 Hom.: 0 AF XY: 0.0000538 AC XY: 7 AN XY: 130038

Gnomad AFR exome AF: 0.000138

Gnomad AMR exome AF: 0.0000594

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000690

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000275

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000384 AC: 56 AN: 1456848 Hom.: 0 Cov.: 31 AF XY: 0.0000373 AC XY: 27 AN XY: 724008

Gnomad4 AFR exome AF: 0.000180

Gnomad4 AMR exome AF: 0.0000453

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000943

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000288

Gnomad4 OTH exome AF: 0.000133

GnomAD4 genome AF: 0.0000526 AC: 8 AN: 152044 Hom.: 0 Cov.: 32 AF XY: 0.0000539 AC XY: 4 AN XY: 74260

Gnomad4 AFR AF: 0.000121

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000208

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.000478

Alfa AF: 0.0000986 Hom.: 0

Bravo AF: 0.0000567

ClinVar

Significance: Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Oct 30, 2019

- -

Long QT syndrome Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Dec 12, 2023

- -

Cardiovascular phenotype Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 23, 2017

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.74
CADD	Benign	1.4
DANN	Benign	0.72

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: rs758461435; hg19: chr12-2715821;