rs147896322

Positions:

• chr12-2679471-G-A

Variant summary

Our verdict is Benign. Variant got -17 ACMG points: 1P and 18B. PP2 BP4_Moderate BP6_Very_Strong BS1 BS2

The NM_000719.7(CACNA1C):​c.5119G>A​(p.Val1707Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000212 in 1,591,000 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V1707A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.00018 (0 hom., cov: 33)
  • Exomes 𝑓: 0.00021 (1 hom.)
• Consequence: CACNA1C NM_000719.7 missense
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:6
• Conservation: PhyloP100: 9.30

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-AS1 (HGNC:40119): (CACNA1C antisense RNA 1)

ACMG classification

Verdict is Benign. Variant got -17 ACMG points.

• PP2: Missense variant where missense usually causes diseases, CACNA1C
• BP4: Computational evidence support a benign effect (MetaRNN=0.15100849).
• BP6: Variant 12-2679471-G-A is Benign according to our data. Variant chr12-2679471-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 190621.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr12-2679471-G-A is described in Lovd as [Likely_benign].
• BS1: Variant frequency is greater than expected in population mid. gnomad4_exome allele frequency = 0.000215 (309/1438778) while in subpopulation MID AF= 0.00511 (29/5670). AF 95% confidence interval is 0.00366. There are 1 homozygotes in gnomad4_exome. There are 176 alleles in male gnomad4_exome subpopulation. Median coverage is 31. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 28 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CACNA1C	NM_000719.7	c.5119G>A	p.Val1707Ile	missense_variant	42/47	ENST00000399655.6
CACNA1C	NM_001167623.2	c.5119G>A	p.Val1707Ile	missense_variant	42/47	ENST00000399603.6
CACNA1C-AS1	NR_045725.1	n.334-1574C>T		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CACNA1C	ENST00000399603.6	c.5119G>A	p.Val1707Ile	missense_variant	42/47	5	NM_001167623.2
CACNA1C	ENST00000399655.6	c.5119G>A	p.Val1707Ile	missense_variant	42/47	1	NM_000719.7
CACNA1C-AS1	ENST00000501371.5	n.295-1574C>T		intron_variant, non_coding_transcript_variant		2

Frequencies

GnomAD3 genomes AF: 0.000184 AC: 28 AN: 152106 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000523

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000415

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000235

Gnomad OTH AF: 0.000478

GnomAD3 exomes AF: 0.000267 AC: 60 AN: 224776 Hom.: 0 AF XY: 0.000312 AC XY: 38 AN XY: 121698

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000245

Gnomad ASJ exome AF: 0.000232

Gnomad EAS exome AF: 0.000118

Gnomad SAS exome AF: 0.000337

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000355

Gnomad OTH exome AF: 0.000540

GnomAD4 exome AF: 0.000215 AC: 309 AN: 1438778 Hom.: 1 Cov.: 31 AF XY: 0.000247 AC XY: 176 AN XY: 712844

Gnomad4 AFR exome AF: 0.0000606

Gnomad4 AMR exome AF: 0.000233

Gnomad4 ASJ exome AF: 0.0000804

Gnomad4 EAS exome AF: 0.0000768

Gnomad4 SAS exome AF: 0.000387

Gnomad4 FIN exome AF: 0.0000192

Gnomad4 NFE exome AF: 0.000188

Gnomad4 OTH exome AF: 0.000387

GnomAD4 genome AF: 0.000184 AC: 28 AN: 152222 Hom.: 0 Cov.: 33 AF XY: 0.000215 AC XY: 16 AN XY: 74414

Gnomad4 AFR AF: 0.0000241

Gnomad4 AMR AF: 0.000523

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000415

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000235

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.000227 Hom.: 0

Bravo AF: 0.000227

TwinsUK AF: 0.00 AC: 0

ALSPAC AF: 0.000519 AC: 2

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000120 AC: 1

ExAC AF: 0.000298 AC: 36

ClinVar

Significance: Likely benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:3

Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jan 01, 2024	CACNA1C: BS1 -

not specified Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Feb 23, 2018

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Long QT syndrome Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jan 25, 2024

- -

Cardiovascular phenotype Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

May 10, 2019

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_addAF	Benign	0.0087	T
BayesDel_noAF	Uncertain	0.080
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Benign	0.0047	T;.;.;.;.;.;.;.;.;.;.;.;.;.;.;T;.;.;.;.;T;.;T
Eigen	Uncertain	0.51
Eigen_PC	Uncertain	0.51
FATHMM_MKL	Pathogenic	0.99	D
M_CAP	Uncertain	0.17	D
MetaRNN	Benign	0.15	T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Uncertain	0.50	D
MutationTaster	Benign	1.0	D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D
PrimateAI	Uncertain	0.62	T
PROVEAN	Benign	-0.59	N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;.
REVEL	Uncertain	0.50
Sift	Benign	0.15	T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;.
Sift4G	Benign	0.56	T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T
Polyphen		1.0, 0.33, 0.33, 0.14, 1.0, 0.35, 1.0, 0.99	.;D;B;B;B;D;D;D;B;D;D;D;D;D;D;.;D;D;.;.;.;D;.
Vest4		0.66
MVP		0.85
MPC		0.43
ClinPred		0.093	T
GERP RS		4.4
gMVP		0.44

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: rs147896322; hg19: chr12-2788637; COSMIC: COSV59747786; COSMIC: COSV59747786;