rs150423825
Positions:
Variant summary
Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1PM2PP3_Moderate
The NM_000334.4(SCN4A):āc.4390G>Cā(p.Gly1464Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,042 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (ā ).
Frequency
Genomes: not found (cov: 32)
Exomes š: 0.0000027 ( 0 hom. )
Consequence
SCN4A
NM_000334.4 missense
NM_000334.4 missense
Scores
11
3
5
Clinical Significance
Conservation
PhyloP100: 7.91
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]
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ACMG classification
Classification made for transcript
Verdict is Likely_pathogenic. Variant got 6 ACMG points.
PM1
In a topological_domain Cytoplasmic (size 18) in uniprot entity SCN4A_HUMAN there are 4 pathogenic changes around while only 0 benign (100%) in NM_000334.4
PM2
Very rare variant in population databases, with high coverage;
PP3
MetaRNN computational evidence supports a deleterious effect, 0.858
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
SCN4A | NM_000334.4 | c.4390G>C | p.Gly1464Arg | missense_variant | 24/24 | ENST00000435607.3 | NP_000325.4 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
SCN4A | ENST00000435607.3 | c.4390G>C | p.Gly1464Arg | missense_variant | 24/24 | 1 | NM_000334.4 | ENSP00000396320.1 |
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 genomes
Cov.:
32
GnomAD4 exome AF: 0.00000274 AC: 4AN: 1461042Hom.: 0 Cov.: 35 AF XY: 0.00000275 AC XY: 2AN XY: 726658
GnomAD4 exome
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4
AN:
1461042
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Cov.:
35
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AC XY:
2
AN XY:
726658
Gnomad4 AFR exome
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GnomAD4 genome Cov.: 32
GnomAD4 genome
Cov.:
32
Bravo
AF:
Asia WGS
AF:
AC:
1
AN:
3478
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Hyperkalemic periodic paralysis Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Nov 01, 2022 | 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. ClinVar contains an entry for this variant (Variation ID: 1358200). This variant has not been reported in the literature in individuals affected with SCN4A-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 arginine, which is basic and polar, at codon 1464 of the SCN4A protein (p.Gly1464Arg). - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
CADD
Pathogenic
DANN
Uncertain
DEOGEN2
Pathogenic
D
Eigen
Benign
Eigen_PC
Benign
FATHMM_MKL
Pathogenic
D
LIST_S2
Uncertain
D
M_CAP
Pathogenic
D
MetaRNN
Pathogenic
D
MetaSVM
Pathogenic
D
MutationAssessor
Benign
N
PrimateAI
Pathogenic
D
PROVEAN
Pathogenic
D
REVEL
Pathogenic
Sift
Benign
D
Sift4G
Uncertain
D
Polyphen
B
Vest4
MutPred
Gain of methylation at G1464 (P = 0.0274);
MVP
MPC
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at