chr1-201093897-G-C

Position:

chr1-201093897-G-C

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_000069.3(CACNA1S):c.383C>G(p.Thr128Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000395 in 1,614,168 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0023 ( 2 hom., cov: 32)

Exomes 𝑓: 0.00020 ( 2 hom. )

Consequence

CACNA1S
NM_000069.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:5

Conservation

PhyloP100: 2.97

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]

CACNA1S links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.012167275).

BP6

Variant 1-201093897-G-C is Benign according to our data. Variant chr1-201093897-G-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 254832.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=1, Benign=4}.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00228 (347/152360) while in subpopulation AFR AF= 0.00801 (333/41584). AF 95% confidence interval is 0.0073. There are 2 homozygotes in gnomad4. There are 149 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 2 SD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CACNA1S	NM_000069.3 linkuse as main transcript	c.383C>G	p.Thr128Ser	missense_variant	3/44	ENST00000362061.4	NP_000060.2	Q13698
CACNA1S	XM_005245478.4 linkuse as main transcript	c.383C>G	p.Thr128Ser	missense_variant	3/43		XP_005245535.1	B1ALM3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CACNA1S	ENST00000362061.4 linkuse as main transcript	c.383C>G	p.Thr128Ser	missense_variant	3/44	1	NM_000069.3	ENSP00000355192.3		Q13698

Frequencies

GnomAD3 genomes

AF:

0.00228

AC:

347

AN:

152242

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00803

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000589

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:

0.0000147

Gnomad OTH

AF:

0.00191

GnomAD3 exomes

AF:

0.000553

AC:

139

AN:

251488

Hom.:

AF XY:

0.000368

AC XY:

AN XY:

135922

show subpopulations

Gnomad AFR exome

AF:

0.00769

Gnomad AMR exome

AF:

0.000260

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000980

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.000199

AC:

291

AN:

1461808

Hom.:

Cov.:

AF XY:

0.000175

AC XY:

127

AN XY:

727194

show subpopulations

Gnomad4 AFR exome

AF:

0.00711

Gnomad4 AMR exome

AF:

0.000470

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000464

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.000447

GnomAD4 genome

AF:

0.00228

AC:

347

AN:

152360

Hom.:

Cov.:

AF XY:

0.00200

AC XY:

149

AN XY:

74506

show subpopulations

Gnomad4 AFR

AF:

0.00801

Gnomad4 AMR

AF:

0.000588

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00189

Alfa

AF:

0.000646

Hom.:

Bravo

AF:

0.00254

ESP6500AA

AF:

0.00817

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000708

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:5

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Benign:2

Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Dec 29, 2023	- -
Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 02, 2023

The c.383C>G (p.T128S) alteration is located in exon 3 (coding exon 3) of the CACNA1S gene. This alteration results from a C to G substitution at nucleotide position 383, causing the threonine (T) at amino acid position 128 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Hypokalemic periodic paralysis, type 1

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Apr 17, 2020

- -

Malignant hyperthermia, susceptibility to, 5;C3714580:Hypokalemic periodic paralysis, type 1

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 16, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Benign

-0.31

BayesDel_noAF

Benign

-0.21

CADD

Benign

DANN

Benign

0.95

DEOGEN2

Benign

0.40

T;T

Eigen

Benign

-0.41

Eigen_PC

Benign

-0.29

FATHMM_MKL

Uncertain

0.77

LIST_S2

Benign

0.77

T;T

M_CAP

Benign

0.034

MetaRNN

Benign

0.012

T;T

MetaSVM

Uncertain

0.16

MutationAssessor

Benign

1.1

.;L

PrimateAI

Benign

0.35

PROVEAN

Benign

-1.4

N;N

REVEL

Uncertain

0.32

Sift

Benign

0.14

T;T

Sift4G

Benign

0.10

T;T

Polyphen

0.0

.;B

Vest4

0.29

MutPred

0.57

Gain of glycosylation at T128 (P = 0.1087);Gain of glycosylation at T128 (P = 0.1087);

MVP

0.87

MPC

0.095

ClinPred

0.015

GERP RS

0.58

Varity_R

0.063

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