rs777298727
Variant summary
Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM1PP3
The NM_000334.4(SCN4A):c.3871A>G(p.Ile1291Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000685 in 1,460,074 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 (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I1291T) has been classified as Uncertain significance.
Frequency
Consequence
NM_000334.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 3 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
SCN4A | NM_000334.4 | c.3871A>G | p.Ile1291Val | missense_variant | 21/24 | ENST00000435607.3 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
SCN4A | ENST00000435607.3 | c.3871A>G | p.Ile1291Val | missense_variant | 21/24 | 1 | NM_000334.4 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 exomes AF: 0.0000365 AC: 9AN: 246900Hom.: 0 AF XY: 0.0000299 AC XY: 4AN XY: 133830
GnomAD4 exome AF: 0.00000685 AC: 10AN: 1460074Hom.: 0 Cov.: 32 AF XY: 0.00000689 AC XY: 5AN XY: 726118
GnomAD4 genome ? Cov.: 32
ClinVar
Submissions by phenotype
Hyperkalemic periodic paralysis Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Aug 22, 2023 | This sequence change replaces isoleucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 1291 of the SCN4A protein (p.Ile1291Val). This variant is present in population databases (rs777298727, gnomAD 0.03%). This missense change has been observed in individual(s) with clinical features of congenital myopathy (Invitae). ClinVar contains an entry for this variant (Variation ID: 586514). 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. 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. - |
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Athena Diagnostics | Mar 26, 2019 | - - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at