rs771053661

Positions:

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM2PP2PP3_Moderate

The NM_000719.7(CACNA1C):c.4625G>A(p.Arg1542His) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,459,950 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 12/21 in silico tools predict a damaging outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

CACNA1C
NM_000719.7 missense, splice_region

Scores

Splicing: ADA: 0.8058

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 10.0

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-AS2 (HGNC:40118): (CACNA1C antisense RNA 2)

CACNA1C-AS2 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 5 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), CACNA1C. . Gene score misZ 6.4654 (greater than the threshold 3.09). Trascript score misZ 7.2674 (greater than threshold 3.09). GenCC has associacion of gene with intellectual disability, neurodevelopmental disorder with hypotonia, language delay, and skeletal defects with or without seizures, Brugada syndrome, long QT syndrome, short QT syndrome, long qt syndrome 8, Timothy syndrome, Brugada syndrome 3.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.923

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
CACNA1C	NM_000719.7 linkuse as main transcript	c.4625G>A	p.Arg1542His	missense_variant, splice_region_variant	38/47	ENST00000399655.6	NP_000710.5
CACNA1C	NM_001167623.2 linkuse as main transcript	c.4625G>A	p.Arg1542His	missense_variant, splice_region_variant	38/47	ENST00000399603.6	NP_001161095.1
CACNA1C-AS2	NR_046579.1 linkuse as main transcript	n.175C>T		non_coding_transcript_exon_variant	2/2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
CACNA1C	ENST00000399603.6 linkuse as main transcript	c.4625G>A	p.Arg1542His	missense_variant, splice_region_variant	38/47	5	NM_001167623.2	ENSP00000382512	Q13936-37
CACNA1C	ENST00000399655.6 linkuse as main transcript	c.4625G>A	p.Arg1542His	missense_variant, splice_region_variant	38/47	1	NM_000719.7	ENSP00000382563	Q13936-12
CACNA1C-AS2	ENST00000545526.1 linkuse as main transcript	n.175C>T		non_coding_transcript_exon_variant	2/2	2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000399

AC:

AN:

250416

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135636

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000463

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1459950

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726442

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

9.01e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Long QT syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 27, 2021

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. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This variant has not been reported in the literature in individuals with CACNA1C-related disease. This variant is present in population databases (rs771053661, ExAC no frequency). This sequence change replaces arginine with histidine at codon 1542 of the CACNA1C protein (p.Arg1542His). The arginine residue is highly conserved and there is a small physicochemical difference between arginine and histidine. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.31

BayesDel_noAF

Pathogenic

0.20

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.71

D;.;.;.;.;.;.;.;.;.;.;.;.;.;.;T;.;.;.;.;T;.;T

Eigen

Pathogenic

0.76

Eigen_PC

Pathogenic

0.68

FATHMM_MKL

Pathogenic

1.0

M_CAP

Pathogenic

0.76

MetaRNN

Pathogenic

0.92

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

1.1

MutationAssessor

Uncertain

2.5

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

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

Pathogenic

0.91

PROVEAN

Pathogenic

-4.6

D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;.

REVEL

Pathogenic

0.87

Sift

Benign

0.031

D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;D;.

Sift4G

Uncertain

0.010

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

Polyphen

1.0, 0.75

.;D;D;P;D;D;D;D;D;D;D;D;D;D;D;.;D;D;.;.;.;D;.

Vest4

0.90

MutPred

0.66

.;.;.;.;.;.;.;.;.;.;Gain of catalytic residue at S1593 (P = 0);.;.;.;.;.;.;.;.;.;.;.;.;

MVP

0.94

MPC

2.5

ClinPred

1.0

GERP RS

3.7

gMVP

0.98

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.81

dbscSNV1_RF

Pathogenic

0.81

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