rs768830617

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BS2

The NM_000719.7(CACNA1C):c.1520G>A(p.Arg507His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000376 in 1,593,666 control chromosomes in the GnomAD database, with no homozygous occurrence. 13/22 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R507C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000039 ( 0 hom. )

Consequence

CACNA1C
NM_000719.7 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:1

Conservation

PhyloP100: 8.11

Publications

7 publications found

Variant links:

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 Gene-Disease associations (from GenCC):

Timothy syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet, G2P, Labcorp Genetics (formerly Invitae)
neurodevelopmental disorder with hypotonia, language delay, and skeletal defects with or without seizures
Inheritance: AD Classification: STRONG Submitted by: Ambry Genetics
long QT syndrome
Inheritance: AD Classification: MODERATE Submitted by: ClinGen
long QT syndrome 8
Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
Brugada syndrome
Inheritance: AD Classification: SUPPORTIVE, NO_KNOWN Submitted by: Orphanet, ClinGen
Brugada syndrome 3
Inheritance: AD Classification: LIMITED, NO_KNOWN Submitted by: Ambry Genetics, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
intellectual disability
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
short QT syndrome
Inheritance: AD Classification: LIMITED, NO_KNOWN Submitted by: Ambry Genetics, ClinGen

CACNA1C links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

BS2

High AC in GnomAdExome4 at 56 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CACNA1C	NM_000719.7 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 47	ENST00000399655.6	NP_000710.5
CACNA1C	NM_001167623.2 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 47	ENST00000399603.6	NP_001161095.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein
CACNA1C	ENST00000399603.6 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 47	5	NM_001167623.2	ENSP00000382512.1
CACNA1C	ENST00000399655.6 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 47	1	NM_000719.7	ENSP00000382563.1
CACNA1C	ENST00000682544.1 link	c.1610G>A	p.Arg537His	missense_variant	Exon 12 of 50			ENSP00000507184.1
CACNA1C	ENST00000406454.8 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 48	5		ENSP00000385896.3
CACNA1C	ENST00000399634.6 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 47	5		ENSP00000382542.2
CACNA1C	ENST00000683824.1 link	c.1685G>A	p.Arg562His	missense_variant	Exon 13 of 48			ENSP00000507867.1
CACNA1C	ENST00000347598.9 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 49	1		ENSP00000266376.6
CACNA1C	ENST00000344100.7 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 47	1		ENSP00000341092.3
CACNA1C	ENST00000327702.12 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 48	1		ENSP00000329877.7
CACNA1C	ENST00000399617.6 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 48	5		ENSP00000382526.1
CACNA1C	ENST00000682462.1 link	c.1610G>A	p.Arg537His	missense_variant	Exon 12 of 47			ENSP00000507105.1
CACNA1C	ENST00000683781.1 link	c.1610G>A	p.Arg537His	missense_variant	Exon 12 of 47			ENSP00000507434.1
CACNA1C	ENST00000683840.1 link	c.1610G>A	p.Arg537His	missense_variant	Exon 12 of 47			ENSP00000507612.1
CACNA1C	ENST00000683956.1 link	c.1610G>A	p.Arg537His	missense_variant	Exon 12 of 47			ENSP00000506882.1
CACNA1C	ENST00000399638.5 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 48	1		ENSP00000382547.1
CACNA1C	ENST00000335762.10 link	c.1595G>A	p.Arg532His	missense_variant	Exon 13 of 48	5		ENSP00000336982.5
CACNA1C	ENST00000399606.5 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 48	1		ENSP00000382515.1
CACNA1C	ENST00000399621.5 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 47	1		ENSP00000382530.1
CACNA1C	ENST00000399637.5 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 47	1		ENSP00000382546.1
CACNA1C	ENST00000402845.7 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 47	1		ENSP00000385724.3
CACNA1C	ENST00000399629.5 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 47	1		ENSP00000382537.1
CACNA1C	ENST00000682336.1 link	c.1595G>A	p.Arg532His	missense_variant	Exon 13 of 47			ENSP00000507898.1
CACNA1C	ENST00000399591.5 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 46	1		ENSP00000382500.1
CACNA1C	ENST00000399595.5 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 46	1		ENSP00000382504.1
CACNA1C	ENST00000399649.5 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 46	1		ENSP00000382557.1
CACNA1C	ENST00000399597.5 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 47	1		ENSP00000382506.1
CACNA1C	ENST00000399601.5 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 47	1		ENSP00000382510.1
CACNA1C	ENST00000399641.6 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 47	1		ENSP00000382549.1
CACNA1C	ENST00000399644.5 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 47	1		ENSP00000382552.1
CACNA1C	ENST00000682835.1 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 47			ENSP00000507282.1
CACNA1C	ENST00000683482.1 link	c.1511G>A	p.Arg504His	missense_variant	Exon 12 of 47			ENSP00000507169.1
CACNA1C	ENST00000682686.1 link	c.1520G>A	p.Arg507His	missense_variant	Exon 12 of 46			ENSP00000507309.1
CACNA1C	ENST00000480911.6 link	n.*127G>A		non_coding_transcript_exon_variant	Exon 10 of 27	5		ENSP00000437936.2
CACNA1C	ENST00000480911.6 link	n.*127G>A		3_prime_UTR_variant	Exon 10 of 27	5		ENSP00000437936.2

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152196

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000320

AC:

AN:

218684

AF XY:

0.0000340

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000635

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000126

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000309

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000388

AC:

AN:

1441470

Hom.:

Cov.:

AF XY:

0.0000364

AC XY:

AN XY:

714864

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32980

American (AMR)

AF:

0.0000236

AC:

AN:

42286

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25716

East Asian (EAS)

AF:

0.0000517

AC:

AN:

38712

South Asian (SAS)

AF:

0.0000121

AC:

AN:

82374

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52098

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5728

European-Non Finnish (NFE)

AF:

0.0000463

AC:

AN:

1101876

Other (OTH)

AF:

0.0000168

AC:

AN:

59700

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.442

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152196

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74340

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41434

American (AMR)

AF:

0.0000654

AC:

AN:

15286

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.000193

AC:

AN:

5192

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68052

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.488

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000329

Hom.:

Bravo

AF:

0.0000189

ExAC

AF:

0.0000331

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Brugada syndrome 3

Uncertain:1

Dec 02, 2020

Genetics and Molecular Pathology, SA Pathology

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Timothy syndrome;C2678478:Brugada syndrome 3;C5774213:Neurodevelopmental disorder with hypotonia, language delay, and skeletal defects with or without seizures;CN260585:Long QT syndrome 8

Uncertain:1

Mar 12, 2024

Fulgent Genetics, Fulgent Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

not provided

Uncertain:1

Jul 05, 2024

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge

Long QT syndrome

Uncertain:1

Sep 17, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 507 of the CACNA1C protein (p.Arg507His). This variant is present in population databases (rs768830617, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with CACNA1C-related conditions. ClinVar contains an entry for this variant (Variation ID: 308133). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed for this missense variant. However, the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on CACNA1C protein function. 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.

Cardiovascular phenotype

Benign:1

Apr 19, 2024

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

AlphaMissense

Pathogenic

0.78

CardioboostArm

Pathogenic

1.0

BayesDel_addAF

Pathogenic

0.16

BayesDel_noAF

Pathogenic

0.23

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.086

T;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;T;.;.;.;.;T;.

Eigen

Pathogenic

0.95

Eigen_PC

Pathogenic

0.90

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Benign

0.0

.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.

M_CAP

Pathogenic

0.65

MetaRNN

Uncertain

0.71

D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D

MetaSVM

Pathogenic

1.0

MutationAssessor

Benign

0.0

.;M;.;M;M;M;M;M;M;M;M;M;M;M;M;M;.;M;M;M;.;.;.

PhyloP100

8.1

PrimateAI

Pathogenic

0.89

PROVEAN

Pathogenic

-4.5

D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D

REVEL

Pathogenic

0.88

Sift

Uncertain

0.015

D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D

Sift4G

Uncertain

0.052

T;T;D;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T

Vest4

0.61

ClinPred

0.69

GERP RS

5.3

PromoterAI

-0.024

Neutral

(source)

gMVP

0.88

Mutation Taster

=29/71

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over