rs545724550
Positions:
Variant summary
Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM1BP6
The NM_000334.4(SCN4A):c.4052C>T(p.Thr1351Met) variant causes a missense change. The variant allele was found at a frequency of 0.0000242 in 1,613,668 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. T1351T) has been classified as Likely benign.
Frequency
Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)
Exomes 𝑓: 0.000025 ( 0 hom. )
Consequence
SCN4A
NM_000334.4 missense
NM_000334.4 missense
Scores
5
9
5
Clinical Significance
Conservation
PhyloP100: 3.60
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]
Genome browser will be placed here
ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 1 ACMG points.
PM1
?
In a topological_domain Cytoplasmic (size 62) in uniprot entity SCN4A_HUMAN there are 22 pathogenic changes around while only 2 benign (92%) in NM_000334.4
BP6
?
Variant 17-63943062-G-A is Benign according to our data. Variant chr17-63943062-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 324520.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=4, Likely_benign=4}.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
SCN4A | NM_000334.4 | c.4052C>T | p.Thr1351Met | missense_variant | 23/24 | ENST00000435607.3 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
SCN4A | ENST00000435607.3 | c.4052C>T | p.Thr1351Met | missense_variant | 23/24 | 1 | NM_000334.4 | P1 |
Frequencies
GnomAD3 genomes ? AF: 0.0000197 AC: 3AN: 152162Hom.: 0 Cov.: 32
GnomAD3 genomes
?
AF:
AC:
3
AN:
152162
Hom.:
Cov.:
32
Gnomad AFR
AF:
Gnomad AMI
AF:
Gnomad AMR
AF:
Gnomad ASJ
AF:
Gnomad EAS
AF:
Gnomad SAS
AF:
Gnomad FIN
AF:
Gnomad MID
AF:
Gnomad NFE
AF:
Gnomad OTH
AF:
GnomAD3 exomes AF: 0.0000399 AC: 10AN: 250772Hom.: 0 AF XY: 0.0000369 AC XY: 5AN XY: 135532
GnomAD3 exomes
AF:
AC:
10
AN:
250772
Hom.:
AF XY:
AC XY:
5
AN XY:
135532
Gnomad AFR exome
AF:
Gnomad AMR exome
AF:
Gnomad ASJ exome
AF:
Gnomad EAS exome
AF:
Gnomad SAS exome
AF:
Gnomad FIN exome
AF:
Gnomad NFE exome
AF:
Gnomad OTH exome
AF:
GnomAD4 exome AF: 0.0000246 AC: 36AN: 1461506Hom.: 0 Cov.: 37 AF XY: 0.0000248 AC XY: 18AN XY: 727010
GnomAD4 exome
AF:
AC:
36
AN:
1461506
Hom.:
Cov.:
37
AF XY:
AC XY:
18
AN XY:
727010
Gnomad4 AFR exome
AF:
Gnomad4 AMR exome
AF:
Gnomad4 ASJ exome
AF:
Gnomad4 EAS exome
AF:
Gnomad4 SAS exome
AF:
Gnomad4 FIN exome
AF:
Gnomad4 NFE exome
AF:
Gnomad4 OTH exome
AF:
GnomAD4 genome ? AF: 0.0000197 AC: 3AN: 152162Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0AN XY: 74330
GnomAD4 genome
?
AF:
AC:
3
AN:
152162
Hom.:
Cov.:
32
AF XY:
AC XY:
0
AN XY:
74330
Gnomad4 AFR
AF:
Gnomad4 AMR
AF:
Gnomad4 ASJ
AF:
Gnomad4 EAS
AF:
Gnomad4 SAS
AF:
Gnomad4 FIN
AF:
Gnomad4 NFE
AF:
Gnomad4 OTH
AF:
Alfa
AF:
Hom.:
Bravo
AF:
ExAC
?
AF:
AC:
6
EpiCase
AF:
EpiControl
AF:
ClinVar
Significance: Conflicting classifications of pathogenicity
Submissions summary: Uncertain:4Benign:4
Revision: criteria provided, conflicting classifications
LINK: link
Submissions by phenotype
Hyperkalemic periodic paralysis Uncertain:1Benign:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Apr 09, 2023 | 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 SCN4A protein function. ClinVar contains an entry for this variant (Variation ID: 324520). This variant has not been reported in the literature in individuals affected with SCN4A-related conditions. This variant is present in population databases (rs545724550, gnomAD 0.01%). This sequence change replaces threonine, which is neutral and polar, with methionine, which is neutral and non-polar, at codon 1351 of the SCN4A protein (p.Thr1351Met). - |
Likely benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 12, 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 likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. - |
Inborn genetic diseases Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | May 26, 2022 | The c.4052C>T (p.T1351M) alteration is located in exon 23 (coding exon 23) of the SCN4A gene. This alteration results from a C to T substitution at nucleotide position 4052, causing the threonine (T) at amino acid position 1351 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. - |
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Athena Diagnostics | May 15, 2018 | - - |
Congenital myasthenic syndrome 16 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 12, 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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. - |
Hypokalemic periodic paralysis, type 2 Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 12, 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 likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. - |
Paramyotonia congenita of Von Eulenburg Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 12, 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 likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. - |
Potassium-aggravated myotonia Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 12, 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 likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Uncertain
T
BayesDel_noAF
Uncertain
CADD
Benign
DANN
Uncertain
DEOGEN2
Pathogenic
D
Eigen
Benign
Eigen_PC
Benign
FATHMM_MKL
Uncertain
D
LIST_S2
Uncertain
D
M_CAP
Pathogenic
D
MetaRNN
Uncertain
D
MetaSVM
Pathogenic
D
MutationAssessor
Uncertain
M
MutationTaster
Benign
D;D
PrimateAI
Benign
T
PROVEAN
Pathogenic
D
REVEL
Uncertain
Sift
Pathogenic
D
Sift4G
Uncertain
D
Polyphen
D
Vest4
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