1-201039866-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_000069.3(CACNA1S):​c.5587G>A​(p.Gly1863Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,457,684 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 34)
Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

CACNA1S
NM_000069.3 missense

Scores

3
16

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.59
Variant links:
Genes affected
CACNA1S (HGNC:1397): (calcium voltage-gated channel subunit alpha1 S) This gene encodes one of the five subunits of the slowly inactivating L-type voltage-dependent calcium channel in skeletal muscle cells. Mutations in this gene have been associated with hypokalemic periodic paralysis, thyrotoxic periodic paralysis and malignant hyperthermia susceptibility. [provided by RefSeq, Jul 2008]

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (MetaRNN=0.15547943).

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
CACNA1SNM_000069.3 linkc.5587G>A p.Gly1863Ser missense_variant Exon 44 of 44 ENST00000362061.4 NP_000060.2 Q13698
CACNA1SXM_005245478.4 linkc.5530G>A p.Gly1844Ser missense_variant Exon 43 of 43 XP_005245535.1 B1ALM3

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
CACNA1SENST00000362061.4 linkc.5587G>A p.Gly1863Ser missense_variant Exon 44 of 44 1 NM_000069.3 ENSP00000355192.3 Q13698

Frequencies

GnomAD3 genomes
Cov.:
34
GnomAD4 exome
AF:
0.00000137
AC:
2
AN:
1457684
Hom.:
0
Cov.:
31
AF XY:
0.00000138
AC XY:
1
AN XY:
725422
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:
0.0000232
Gnomad4 FIN exome
AF:
0.00
Gnomad4 NFE exome
AF:
0.00
Gnomad4 OTH exome
AF:
0.00
GnomAD4 genome
Cov.:
34

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link

Submissions by phenotype

Malignant hyperthermia, susceptibility to, 5;C3714580:Hypokalemic periodic paralysis, type 1 Uncertain:1
Feb 07, 2023
Labcorp Genetics (formerly Invitae), Labcorp
Significance: Uncertain significance
Review Status: criteria provided, single submitter
Collection Method: clinical testing

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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt CACNA1S protein function. This variant has not been reported in the literature in individuals affected with CACNA1S-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces glycine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 1863 of the CACNA1S protein (p.Gly1863Ser). -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
0.085
BayesDel_addAF
Uncertain
0.039
T
BayesDel_noAF
Benign
-0.18
CADD
Benign
18
DANN
Uncertain
0.98
DEOGEN2
Benign
0.014
T;T
Eigen
Benign
-0.24
Eigen_PC
Benign
-0.17
FATHMM_MKL
Benign
0.61
D
LIST_S2
Benign
0.73
T;T
M_CAP
Benign
0.074
D
MetaRNN
Benign
0.16
T;T
MetaSVM
Uncertain
0.36
D
MutationAssessor
Benign
1.4
.;L
PrimateAI
Benign
0.36
T
PROVEAN
Benign
0.060
N;N
REVEL
Benign
0.27
Sift
Benign
0.046
D;D
Sift4G
Benign
0.071
T;T
Polyphen
0.093
.;B
Vest4
0.13
MutPred
0.35
.;Gain of phosphorylation at G1863 (P = 0.04);
MVP
0.92
MPC
0.11
ClinPred
0.26
T
GERP RS
3.7
Varity_R
0.074
gMVP
0.47

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-201008994; API