rs199473564
Variant summary
Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM2PP2PP3_Strong
The NM_001099404.2(SCN5A):c.944T>C(p.Leu315Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,206 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. L315V) has been classified as Uncertain significance.
Frequency
Consequence
NM_001099404.2 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_pathogenic. Variant got 7 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
SCN5A | NM_001099404.2 | c.944T>C | p.Leu315Pro | missense_variant | 8/28 | ENST00000413689.6 | |
SCN5A | NM_000335.5 | c.944T>C | p.Leu315Pro | missense_variant | 8/28 | ENST00000423572.7 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
SCN5A | ENST00000413689.6 | c.944T>C | p.Leu315Pro | missense_variant | 8/28 | 5 | NM_001099404.2 | P4 | |
SCN5A | ENST00000423572.7 | c.944T>C | p.Leu315Pro | missense_variant | 8/28 | 1 | NM_000335.5 | A1 |
Frequencies
GnomAD3 genomes ? AF: 0.00000657 AC: 1AN: 152206Hom.: 0 Cov.: 32
GnomAD4 exome Cov.: 28
GnomAD4 genome ? AF: 0.00000657 AC: 1AN: 152206Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1AN XY: 74360
ClinVar
Submissions by phenotype
not specified Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine | Jun 16, 2016 | Variant identified in a genome or exome case(s) and assessed due to predicted null impact of the variant or pathogenic assertions in the literature or databases. Disclaimer: This variant has not undergone full assessment. The following are preliminary notes: Reported in 1 BrS proband. ClinVar: GeneDx classifies as VUS. - |
Uncertain significance, criteria provided, single submitter | clinical testing | Women's Health and Genetics/Laboratory Corporation of America, LabCorp | Mar 07, 2022 | Variant summary: SCN5A c.944T>C (p.Leu315Pro) results in a non-conservative amino acid change located in the Ion transport domain (IPR005821) of the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant was absent in 249250 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.944T>C has been reported in the literature in an individual referred for Brugada syndrome testing (example, Kapplinger_2010). These report(s) do not provide unequivocal conclusions about association of the variant with Arrhythmia. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Three clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as uncertain significance. - |
not provided Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Nov 11, 2023 | This sequence change replaces leucine, which is neutral and non-polar, with proline, which is neutral and non-polar, at codon 315 of the SCN5A protein (p.Leu315Pro). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with clinical features of Brugada syndrome (PMID: 20129283). ClinVar contains an entry for this variant (Variation ID: 68058). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be tolerated. 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. - |
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | May 14, 2014 | p.Leu315Pro (CTG>CCG): c.944 T>C in exon 8 of the SCN5A gene (NM_198056.2) The L315P variant in the SCN5A gene has been reported in a single patient with Brugada syndrome (Kapplinger J et al., 2010). The L315P variant was not observed in approximately 6,200 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. However, the L315P variant is a conservative amino acid substitution, which is not likely to impact secondary protein structure as these residues share similar properties. This substitution occurs at a position that is not conserved across species. However, another missense mutation in a nearby residue (K317N) has been reported in association with Brugada syndrome supporting the functional importance of this region of the protein. Therefore, based on the currently available information, it is unclear whether this variant is a pathogenic mutation or a rare benign variant. The variant is found in ARRHYTHMIA panel(s). - |
Cardiovascular phenotype Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Sep 12, 2017 | The c.944T>C (p.L315P) alteration is located in exon 8 (coding exon 7) of the SCN5A gene. This alteration results from a T to C substitution at nucleotide position 944, causing the leucine (L) at amino acid position 315 to be replaced by a proline (P). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. - |
Cardiac arrhythmia Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | All of Us Research Program, National Institutes of Health | May 04, 2023 | This missense variant replaces leucine with proline at codon 315 of the SCN5A protein. Computational prediction suggests that this variant may have a deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in an individual affected with Brugada syndrome (PMID: 36516610) and in an individual suspected to be affected with Brugada syndrome (PMID: 19716085, 25904541). This variant has not been identified in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. - |
Brugada syndrome Other:1
not provided, no classification provided | literature only | Cardiovascular Biomedical Research Unit, Royal Brompton & Harefield NHS Foundation Trust | - | This variant has been reported as associated with Brugada syndrome in the following publications (PMID:20129283). This is a literature report, and does not necessarily reflect the clinical interpretation of the Imperial College / Royal Brompton Cardiovascular Genetics laboratory. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at