rs199776761

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 1P and 13B. PP2BP4_StrongBP6BS1BS2

The NM_000719.7(CACNA1C):c.5885G>A(p.Arg1962Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000104 in 1,613,974 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. R1962R) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00024 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000090 ( 0 hom. )

Consequence

CACNA1C
NM_000719.7 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 0.228

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 links:

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

CACNA1C-AS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -12 ACMG points.

PP2

Missense variant where missense usually causes diseases, CACNA1C

BP4

Computational evidence support a benign effect (MetaRNN=0.020398736).

BP6

Variant 12-2688547-G-A is Benign according to our data. Variant chr12-2688547-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 190626.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=1, Likely_benign=4}.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000243 (37/152328) while in subpopulation AFR AF= 0.000673 (28/41574). AF 95% confidence interval is 0.000478. There are 0 homozygotes in gnomad4. There are 16 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High AC in GnomAd at 37 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
CACNA1C	NM_000719.7 linkuse as main transcript	c.5885G>A	p.Arg1962Gln	missense_variant	46/47	ENST00000399655.6
CACNA1C	NM_001167623.2 linkuse as main transcript	c.5885G>A	p.Arg1962Gln	missense_variant	46/47	ENST00000399603.6
CACNA1C-AS1	NR_045725.1 linkuse as main transcript	n.333+1593C>T		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	UniProt
CACNA1C	ENST00000399603.6 linkuse as main transcript	c.5885G>A	p.Arg1962Gln	missense_variant	46/47	5	NM_001167623.2	Q13936-37
CACNA1C	ENST00000399655.6 linkuse as main transcript	c.5885G>A	p.Arg1962Gln	missense_variant	46/47	1	NM_000719.7	Q13936-12
CACNA1C-AS1	ENST00000501371.5 linkuse as main transcript	n.294+1593C>T		intron_variant, non_coding_transcript_variant		2

Frequencies

GnomAD3 genomes

AF:

0.000243

AC:

AN:

152210

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000675

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.000955

GnomAD3 exomes

AF:

0.0000928

AC:

AN:

247926

Hom.:

AF XY:

0.0000891

AC XY:

AN XY:

134672

show subpopulations

Gnomad AFR exome

AF:

0.000652

Gnomad AMR exome

AF:

0.000116

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000805

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000896

AC:

131

AN:

1461646

Hom.:

Cov.:

AF XY:

0.0000976

AC XY:

AN XY:

727116

show subpopulations

Gnomad4 AFR exome

AF:

0.000388

Gnomad4 AMR exome

AF:

0.000157

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000953

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.000243

AC:

AN:

152328

Hom.:

Cov.:

AF XY:

0.000215

AC XY:

AN XY:

74496

show subpopulations

Gnomad4 AFR

AF:

0.000673

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.000945

Alfa

AF:

0.000148

Hom.:

Bravo

AF:

0.000185

ESP6500AA

AF:

0.000522

AC:

ESP6500EA

AF:

0.000122

AC:

ExAC

AF:

0.000132

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.000119

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

CACNA1C-related disorder

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Jan 26, 2023

The CACNA1C c.5885G>A variant is predicted to result in the amino acid substitution p.Arg1962Gln. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.071% of alleles in individuals of African descent in gnomAD (http://gnomad.broadinstitute.org/variant/12-2797713-G-A). Although we suspect that this variant may be benign, at this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

May 17, 2021

Variant summary: CACNA1C c.5885G>A (p.Arg1962Gln) results in a conservative amino acid change in the encoded protein sequence. Five of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00011 in 279304 control chromosomes, predominantly at a frequency of 0.00071 within the African or African-American subpopulation in the gnomAD database. The observed variant frequency within African or African-American control individuals in the gnomAD database is approximately 71 fold of the estimated maximal expected allele frequency for a pathogenic variant in CACNA1C causing Timothy Syndrome phenotype (1e-05), strongly suggesting that the variant is a benign polymorphism found primarily in populations of African or African-American origin. c.5885G>A has been reported in the literature in one individual affected with sudden unexplained death (Sanchez_2016). The report does not provide unequivocal conclusions about association of the variant with Timothy Syndrome. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. One ClinVar submitter (evaluation after 2014) cites the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as likely benign. -

Timothy syndrome;C2678478:Brugada syndrome 3;CN260585:Long qt syndrome 8

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Aug 27, 2021

- -

Long QT syndrome

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jan 13, 2024

- -

Cardiovascular phenotype

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 24, 2022

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

CardioboostArm

Benign

0.000027

BayesDel_addAF

Benign

-0.45

BayesDel_noAF

Benign

-0.52

Cadd

Benign

Dann

Uncertain

0.99

DEOGEN2

Benign

0.023

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

Eigen

Benign

-0.72

Eigen_PC

Benign

-0.67

FATHMM_MKL

Benign

0.17

M_CAP

Benign

0.079

MetaRNN

Benign

0.020

T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-1.0

MutationTaster

Benign

1.0

N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N

PrimateAI

Benign

0.28

PROVEAN

Benign

-1.7

N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;N;.

REVEL

Benign

0.037

Sift

Benign

0.096

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

Sift4G

Benign

0.15

T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T

Polyphen

0.014, 0.0070, 0.022, 0.0060, 0.037, 0.021, 0.086, 0.0

.;B;B;B;B;B;B;B;B;B;B;B;B;B;B;.;B;B;.;.;.;B;.

Vest4

0.21

MVP

0.36

MPC

0.22

ClinPred

0.026

GERP RS

1.6

gMVP

0.36

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over