rs187055074

chr17-63972631-G-Achr17-63972631-G-Cchr17-63972631-G-T

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 0P and 3B. BP4_ModerateBP6

The NM_000334.4(SCN4A):c.211C>T(p.Pro71Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000028 in 1,609,790 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts 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. P71P) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00016 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000014 ( 0 hom. )

Consequence

SCN4A
NM_000334.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:1

Conservation

PhyloP100: 1.93

Variant links:

Genes affected

SCN4A (HGNC:10591): (sodium voltage-gated channel alpha subunit 4) Voltage-gated sodium channels are transmembrane glycoprotein complexes composed of a large alpha subunit with 24 transmembrane domains and one or more regulatory beta subunits. They are responsible for the generation and propagation of action potentials in neurons and muscle. This gene encodes one member of the sodium channel alpha subunit gene family. It is expressed in skeletal muscle, and mutations in this gene have been linked to several myotonia and periodic paralysis disorders. [provided by RefSeq, Jul 2008]

SCN4A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.12467119).

BP6

Variant 17-63972631-G-A is Benign according to our data. Variant chr17-63972631-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 586507.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=2, Benign=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SCN4A	NM_000334.4 linkuse as main transcript	c.211C>T	p.Pro71Ser	missense_variant	1/24	ENST00000435607.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SCN4A	ENST00000435607.3 linkuse as main transcript	c.211C>T	p.Pro71Ser	missense_variant	1/24	1	NM_000334.4	P1

Frequencies

GnomAD3 genomes

AF:

0.000164

AC:

AN:

152134

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000580

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000831

AC:

AN:

240726

Hom.:

AF XY:

0.0000383

AC XY:

AN XY:

130438

show subpopulations

Gnomad AFR exome

AF:

0.00136

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:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000137

AC:

AN:

1457538

Hom.:

Cov.:

AF XY:

0.0000138

AC XY:

AN XY:

724700

show subpopulations

Gnomad4 AFR exome

AF:

0.000509

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:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000498

GnomAD4 genome

AF:

0.000164

AC:

AN:

152252

Hom.:

Cov.:

AF XY:

0.000148

AC XY:

AN XY:

74448

show subpopulations

Gnomad4 AFR

AF:

0.000578

Gnomad4 AMR

AF:

0.0000653

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000114

Hom.:

Bravo

AF:

0.000227

ESP6500AA

AF:

0.00123

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000124

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:1

Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Sep 20, 2017	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Aug 11, 2021	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 -

Hyperkalemic periodic paralysis

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jan 25, 2024

This sequence change replaces proline, which is neutral and non-polar, with serine, which is neutral and polar, at codon 71 of the SCN4A protein (p.Pro71Ser). This variant is present in population databases (rs187055074, gnomAD 0.1%). This variant has not been reported in the literature in individuals affected with SCN4A-related conditions. ClinVar contains an entry for this variant (Variation ID: 586507). 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) has been performed at Invitae 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 SCN4A 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.71

BayesDel_addAF

Benign

-0.21

BayesDel_noAF

Benign

-0.11

Cadd

Uncertain

Dann

Uncertain

1.0

DEOGEN2

Uncertain

0.65

Eigen

Uncertain

0.25

Eigen_PC

Benign

0.19

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.97

M_CAP

Pathogenic

0.45

MetaRNN

Benign

0.12

MetaSVM

Pathogenic

0.92

MutationAssessor

Uncertain

2.8

MutationTaster

Benign

0.99

D;D

PrimateAI

Benign

0.41

PROVEAN

Uncertain

-3.2

REVEL

Uncertain

0.54

Sift

Uncertain

0.0090

Sift4G

Benign

0.18

Polyphen

0.94

Vest4

0.42

MVP

0.90

MPC

0.30

ClinPred

0.15

GERP RS

4.2

Varity_R

0.22

gMVP

0.81

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