12-2682556-C-T

Variant names:

• chr12-2682556-C-T
• rs113239186
• NM_000719.7:c.5451C>T

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BS1 BS2

The NM_000719.7(CACNA1C):​c.5451C>T​(p.His1817His) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00069 in 1,612,158 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 (★★).

• Frequency:
  • Genomes: 𝑓 0.00064 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00070 (1 hom.)
• Consequence: CACNA1C NM_000719.7 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:11
• Conservation: PhyloP100: 2.21
• Publications: 3 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]

ITFG2-AS1 (HGNC:53128): (ITFG2 antisense RNA 1)

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

ACMG classification

Our verdict: Benign. The variant received -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.55).
• BP6: Variant 12-2682556-C-T is Benign according to our data. Variant chr12-2682556-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 93414.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=2.21 with no splicing effect.
• BS1: Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000644 (98/152256) while in subpopulation NFE AF = 0.00103 (70/68014). AF 95% confidence interval is 0.000835. There are 0 homozygotes in GnomAd4. There are 38 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.
• BS2: High AC in GnomAd4 at 98 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CACNA1C	NM_000719.7	c.5451C>T	p.His1817His	synonymous_variant	Exon 43 of 47	ENST00000399655.6	NP_000710.5
CACNA1C	NM_001167623.2	c.5451C>T	p.His1817His	synonymous_variant	Exon 43 of 47	ENST00000399603.6	NP_001161095.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CACNA1C	ENST00000399603.6	c.5451C>T	p.His1817His	synonymous_variant	Exon 43 of 47	5	NM_001167623.2	ENSP00000382512.1
CACNA1C	ENST00000399655.6	c.5451C>T	p.His1817His	synonymous_variant	Exon 43 of 47	1	NM_000719.7	ENSP00000382563.1
CACNA1C	ENST00000682544.1	c.5790C>T	p.His1930His	synonymous_variant	Exon 46 of 50			ENSP00000507184.1
CACNA1C	ENST00000406454.8	c.5664C>T	p.His1888His	synonymous_variant	Exon 44 of 48	5		ENSP00000385896.3
CACNA1C	ENST00000399634.6	c.5631C>T	p.His1877His	synonymous_variant	Exon 43 of 47	5		ENSP00000382542.2
CACNA1C	ENST00000683824.1	c.5616C>T	p.His1872His	synonymous_variant	Exon 44 of 48			ENSP00000507867.1
CACNA1C	ENST00000347598.9	c.5595C>T	p.His1865His	synonymous_variant	Exon 45 of 49	1		ENSP00000266376.6
CACNA1C	ENST00000344100.7	c.5574C>T	p.His1858His	synonymous_variant	Exon 43 of 47	1		ENSP00000341092.3
CACNA1C	ENST00000327702.12	c.5556C>T	p.His1852His	synonymous_variant	Exon 44 of 48	1		ENSP00000329877.7
CACNA1C	ENST00000399617.6	c.5556C>T	p.His1852His	synonymous_variant	Exon 44 of 48	5		ENSP00000382526.1
CACNA1C	ENST00000682462.1	c.5541C>T	p.His1847His	synonymous_variant	Exon 43 of 47			ENSP00000507105.1
CACNA1C	ENST00000683781.1	c.5541C>T	p.His1847His	synonymous_variant	Exon 43 of 47			ENSP00000507434.1
CACNA1C	ENST00000683840.1	c.5541C>T	p.His1847His	synonymous_variant	Exon 43 of 47			ENSP00000507612.1
CACNA1C	ENST00000683956.1	c.5541C>T	p.His1847His	synonymous_variant	Exon 43 of 47			ENSP00000506882.1
CACNA1C	ENST00000399638.5	c.5535C>T	p.His1845His	synonymous_variant	Exon 44 of 48	1		ENSP00000382547.1
CACNA1C	ENST00000335762.10	c.5526C>T	p.His1842His	synonymous_variant	Exon 44 of 48	5		ENSP00000336982.5
CACNA1C	ENST00000399606.5	c.5511C>T	p.His1837His	synonymous_variant	Exon 44 of 48	1		ENSP00000382515.1
CACNA1C	ENST00000399621.5	c.5508C>T	p.His1836His	synonymous_variant	Exon 43 of 47	1		ENSP00000382530.1
CACNA1C	ENST00000399637.5	c.5508C>T	p.His1836His	synonymous_variant	Exon 43 of 47	1		ENSP00000382546.1
CACNA1C	ENST00000402845.7	c.5508C>T	p.His1836His	synonymous_variant	Exon 43 of 47	1		ENSP00000385724.3
CACNA1C	ENST00000399629.5	c.5502C>T	p.His1834His	synonymous_variant	Exon 43 of 47	1		ENSP00000382537.1
CACNA1C	ENST00000682336.1	c.5493C>T	p.His1831His	synonymous_variant	Exon 43 of 47			ENSP00000507898.1
CACNA1C	ENST00000399591.5	c.5475C>T	p.His1825His	synonymous_variant	Exon 42 of 46	1		ENSP00000382500.1
CACNA1C	ENST00000399595.5	c.5475C>T	p.His1825His	synonymous_variant	Exon 42 of 46	1		ENSP00000382504.1
CACNA1C	ENST00000399649.5	c.5469C>T	p.His1823His	synonymous_variant	Exon 42 of 46	1		ENSP00000382557.1
CACNA1C	ENST00000399597.5	c.5451C>T	p.His1817His	synonymous_variant	Exon 43 of 47	1		ENSP00000382506.1
CACNA1C	ENST00000399601.5	c.5451C>T	p.His1817His	synonymous_variant	Exon 43 of 47	1		ENSP00000382510.1
CACNA1C	ENST00000399641.6	c.5451C>T	p.His1817His	synonymous_variant	Exon 43 of 47	1		ENSP00000382549.1
CACNA1C	ENST00000399644.5	c.5451C>T	p.His1817His	synonymous_variant	Exon 43 of 47	1		ENSP00000382552.1
CACNA1C	ENST00000682835.1	c.5451C>T	p.His1817His	synonymous_variant	Exon 43 of 47			ENSP00000507282.1
CACNA1C	ENST00000683482.1	c.5442C>T	p.His1814His	synonymous_variant	Exon 43 of 47			ENSP00000507169.1
CACNA1C	ENST00000682686.1	c.5418C>T	p.His1806His	synonymous_variant	Exon 42 of 46			ENSP00000507309.1

Frequencies

GnomAD3 genomes AF: 0.000644 AC: 98 AN: 152138 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000169

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000785

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.00103

Gnomad OTH AF: 0.00335

GnomAD2 exomes AF: 0.000507 AC: 125 AN: 246362 AF XY: 0.000472

Gnomad AFR exome AF: 0.000196

Gnomad AMR exome AF: 0.000322

Gnomad ASJ exome AF: 0.0000999

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000902

Gnomad OTH exome AF: 0.000665

GnomAD4 exome AF: 0.000695 AC: 1015 AN: 1459902 Hom.: 1 Cov.: 31 AF XY: 0.000691 AC XY: 502 AN XY: 726092

African (AFR) AF: 0.000239 AC: 8 AN: 33462

American (AMR) AF: 0.000539 AC: 24 AN: 44530

Ashkenazi Jewish (ASJ) AF: 0.000115 AC: 3 AN: 26100

East Asian (EAS) AF: 0.00 AC: 0 AN: 39686

South Asian (SAS) AF: 0.000163 AC: 14 AN: 85992

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52688

Middle Eastern (MID) AF: 0.00312 AC: 18 AN: 5764

European-Non Finnish (NFE) AF: 0.000796 AC: 885 AN: 1111342

Other (OTH) AF: 0.00104 AC: 63 AN: 60338

GnomAD4 genome AF: 0.000644 AC: 98 AN: 152256 Hom.: 0 Cov.: 32 AF XY: 0.000511 AC XY: 38 AN XY: 74416

African (AFR) AF: 0.000168 AC: 7 AN: 41554

American (AMR) AF: 0.000784 AC: 12 AN: 15302

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

East Asian (EAS) AF: 0.00 AC: 0 AN: 5160

South Asian (SAS) AF: 0.000208 AC: 1 AN: 4816

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10618

Middle Eastern (MID) AF: 0.00340 AC: 1 AN: 294

European-Non Finnish (NFE) AF: 0.00103 AC: 70 AN: 68014

Other (OTH) AF: 0.00331 AC: 7 AN: 2114

Alfa AF: 0.000851 Hom.: 0

Bravo AF: 0.000620

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:11

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:4

Apr 09, 2025

Molecular Diagnostic Laboratory for Inherited Cardiovascular Disease, Montreal Heart Institute

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Apr 03, 2014

Eurofins Ntd Llc (ga)

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

-

Clinical Genetics, Academic Medical Center

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Apr 12, 2019

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided Benign:4

Mar 03, 2015

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jun 01, 2024

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

CACNA1C: BP4, BS1 -

-

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

-

Breakthrough Genomics, Breakthrough Genomics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

CACNA1C-related disorder Benign:1

Dec 20, 2019

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Long QT syndrome Benign:1

Jan 29, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Cardiovascular phenotype Benign:1

Oct 25, 2016

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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	-0.55
CADD	Benign	6.3
DANN	Benign	0.70
PhyloP100		2.2
Mutation Taster		=100/0	polymorphism

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: rs113239186; hg19: chr12-2791722;