rs72549411

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM2BP4_ModerateBP6

The NM_001099404.2(SCN5A):​c.2437-5C>A variant causes a splice region, splice polypyrimidine tract, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000808 in 1,609,246 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00046 ( 0 hom., cov: 32)
Exomes 𝑓: 0.00084 ( 1 hom. )

Consequence

SCN5A
NM_001099404.2 splice_region, splice_polypyrimidine_tract, intron

Scores

2
Splicing: ADA: 0.0005024
2

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:10B:12

Conservation

PhyloP100: 0.570
Variant links:
Genes affected
SCN5A (HGNC:10593): (sodium voltage-gated channel alpha subunit 5) The protein encoded by this gene is an integral membrane protein and tetrodotoxin-resistant voltage-gated sodium channel subunit. This protein is found primarily in cardiac muscle and is responsible for the initial upstroke of the action potential in an electrocardiogram. Defects in this gene have been associated with long QT syndrome type 3 (LQT3), atrial fibrillation, cardiomyopathy, and Brugada syndrome 1, all autosomal dominant cardiac diseases. Alternative splicing results in several transcript variants encoding different isoforms. [provided by RefSeq, May 2022]

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (BayesDel_noAF=-0.43).
BP6
Variant 3-38586046-G-T is Benign according to our data. Variant chr3-38586046-G-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 139054.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=5, Benign=2, Uncertain_significance=11}. Variant chr3-38586046-G-T is described in Lovd as [Benign]. Variant chr3-38586046-G-T is described in Lovd as [Likely_benign].

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE Protein UniProt
SCN5ANM_000335.5 linkuse as main transcriptc.2437-5C>A splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant ENST00000423572.7 NP_000326.2
SCN5ANM_001099404.2 linkuse as main transcriptc.2437-5C>A splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant ENST00000413689.6 NP_001092874.1

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Protein Appris UniProt
SCN5AENST00000413689.6 linkuse as main transcriptc.2437-5C>A splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant 5 NM_001099404.2 ENSP00000410257 P4
SCN5AENST00000423572.7 linkuse as main transcriptc.2437-5C>A splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant 1 NM_000335.5 ENSP00000398266 A1Q14524-2

Frequencies

GnomAD3 genomes
AF:
0.000460
AC:
70
AN:
152090
Hom.:
0
Cov.:
32
show subpopulations
Gnomad AFR
AF:
0.000241
Gnomad AMI
AF:
0.00
Gnomad AMR
AF:
0.000262
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:
0.000823
Gnomad OTH
AF:
0.00
GnomAD3 exomes
AF:
0.000389
AC:
96
AN:
246686
Hom.:
0
AF XY:
0.000433
AC XY:
58
AN XY:
133884
show subpopulations
Gnomad AFR exome
AF:
0.0000647
Gnomad AMR exome
AF:
0.0000581
Gnomad ASJ exome
AF:
0.00
Gnomad EAS exome
AF:
0.00
Gnomad SAS exome
AF:
0.0000329
Gnomad FIN exome
AF:
0.00
Gnomad NFE exome
AF:
0.000814
Gnomad OTH exome
AF:
0.000331
GnomAD4 exome
AF:
0.000845
AC:
1231
AN:
1457038
Hom.:
1
Cov.:
35
AF XY:
0.000835
AC XY:
605
AN XY:
724232
show subpopulations
Gnomad4 AFR exome
AF:
0.0000599
Gnomad4 AMR exome
AF:
0.0000449
Gnomad4 ASJ exome
AF:
0.00
Gnomad4 EAS exome
AF:
0.00
Gnomad4 SAS exome
AF:
0.0000116
Gnomad4 FIN exome
AF:
0.00
Gnomad4 NFE exome
AF:
0.00107
Gnomad4 OTH exome
AF:
0.000698
GnomAD4 genome
AF:
0.000460
AC:
70
AN:
152208
Hom.:
0
Cov.:
32
AF XY:
0.000417
AC XY:
31
AN XY:
74404
show subpopulations
Gnomad4 AFR
AF:
0.000241
Gnomad4 AMR
AF:
0.000262
Gnomad4 ASJ
AF:
0.00
Gnomad4 EAS
AF:
0.00
Gnomad4 SAS
AF:
0.00
Gnomad4 FIN
AF:
0.00
Gnomad4 NFE
AF:
0.000823
Gnomad4 OTH
AF:
0.00
Alfa
AF:
0.000732
Hom.:
0
Bravo
AF:
0.000434

ClinVar

Significance: Conflicting classifications of pathogenicity
Submissions summary: Uncertain:10Benign:12
Revision: criteria provided, conflicting classifications
LINK: link

Submissions by phenotype

not provided Uncertain:1Benign:7
Likely benign, criteria provided, single submitterclinical testingLabcorp Genetics (formerly Invitae), LabcorpJan 31, 2024- -
Likely benign, no assertion criteria providedclinical testingJoint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+-- -
Likely benign, no assertion criteria providedclinical testingGenome Diagnostics Laboratory, University Medical Center Utrecht-- -
Likely benign, no assertion criteria providedclinical testingClinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center-- -
Likely benign, no assertion criteria providedclinical testingDiagnostic Laboratory, Department of Genetics, University Medical Center Groningen-- -
Likely benign, criteria provided, single submitterclinical testingCeGaT Center for Human Genetics TuebingenJan 01, 2024SCN5A: BP4 -
Uncertain significance, criteria provided, single submitterclinical testingARUP Laboratories, Molecular Genetics and Genomics, ARUP LaboratoriesApr 23, 2021The SCN5A c.2437-5C>A variant (rs72549411) is reported in the literature in individuals affected with long QT syndrome (LQTS), hypertrophic cardiomyopathy, or sudden arrhythmic death syndrome (Leong 2017, Lopes 2015, Raju 2019). This variant was found in several affected individuals from a family with LQTS, although it was also found in several family members without symptoms (Leong 2017). The c.2437-5C>A variant is found in the non-Finnish European population with an overall allele frequency of 0.08% (105/125956 alleles) in the Genome Aggregation Database. This is an intronic variant in a weakly conserved nucleotide, and computational analyses (Alamut v.2.11) predict that this variant does not alter splicing. However, analysis of RNA from an individual carrying this variant suggests it is associated with skipping of SCN5A exon 16 (Leong 2017). Due to limited and conflicting information, the clinical significance of this variant cannot be determined at this time. References: Leong IUS et al. Splice Site Variants in the KCNQ1 and SCN5A Genes: Transcript Analysis as a Tool in Supporting Pathogenicity. J Clin Med Res. 2017 Aug;9(8):709-718. Lopes LR et al. Novel genotype-phenotype associations demonstrated by high-throughput sequencing in patients with hypertrophic cardiomyopathy. Heart. 2015 Feb;101(4):294-301. Raju H et al. Next-generation sequencing using microfluidic PCR enrichment for molecular autopsy. BMC Cardiovasc Disord. 2019 Jul 23;19(1):174. -
Benign, criteria provided, single submitterclinical testingWomen's Health and Genetics/Laboratory Corporation of America, LabCorpJan 25, 2016Variant summary: This c.2437-5C>A variant affects an intronic non-conserved nucleotide located at a position not widely know to affects splicing. Mutation taster predicts disease causing outcome while 4/5 in silico tools via Alamut predict no effect on normal splicing. It was observed predominantly in the Non-Finnish European subcohort of the ExAC project at an allele frequency of 0.056% (34/59828 chromosomes) which exceeds the maximal expected allele frequency of a disease causing SCN5A allele (0.01%) indicating the variant to be benign. To our knowledge, the variant has been not reported in affected individuals till date. A clinical diagnostic center classifies variant as Benign via ClinVar (without evidence to independently evaluate), Considering all evidence, the variant was classified as Benign. -
not specified Uncertain:1Benign:2
Benign, no assertion criteria providedclinical testingClinical Genetics, Academic Medical Center-- -
Uncertain significance, criteria provided, single submitterclinical testingLaboratory for Molecular Medicine, Mass General Brigham Personalized MedicineJan 31, 2019Variant classified as Uncertain Significance - Favor Benign. The c.2437-5C>A variant in SCN5A has been identified in 1/128 cases of sudden unexplained death (Marcondes 2018). Has also been identified in 0.083% of European chromosomes in gnomAD (dbSNP rs72549411). This variant is also present in ClinVar (ID 039054) with conflicting interpretations (LB/ Uncertain significance). This variant is located in the 3' splice region. Computational tools do not predict a splicing impact, though this information is not predictive enough to rule out pathogenicity. In summary, while the clinical significance of the c.2437-5C>A variant is uncertain, these data suggest that it is more likely to be benign/its frequency suggests that it is more likely to be benign. ACMG/AMP Criteria applied: BP4. -
Benign, criteria provided, single submitterclinical testingGeneDxDec 06, 2013This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Brugada syndrome 1 Uncertain:1Benign:1
Likely benign, criteria provided, single submitterin vitro;researchRoden Lab, Vanderbilt University Medical Center-We classified this variant using data from the calibrated functional assay 'ParSE-seq' (PMID: 37732247), population data, and in silico data within the ACMG v3 framework (PMID: 25741868)The SCN5A variant, 3-38586046-G-T was evaluated for association with the loss-of-function condition Brugada Syndrome.This Variant had an AF of 0.000460254 in gnomAD v3The in silico predictor SpliceAI scored the variant as 0.01; normal <0.2, likely damaging >0.5.Using the functional RNA-splicing assay, ParSE-seq, the variant was evaluated to have no impact on splicing (BS3_strong) following the Brnich et al. calibration framework (PMID: 31892348). We do not apply benign splicing functional data to missense variants. In aggregate, we therefore classify this variant as LB using these collective data. -
Uncertain significance, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaJan 12, 2018This 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. -
Ventricular fibrillation, paroxysmal familial, type 1 Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaJan 12, 2018This 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. -
Dilated cardiomyopathy 1E Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaJan 12, 2018This 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. -
Cardiomyopathy Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingCHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern OntarioAug 02, 2022- -
Sick sinus syndrome 1 Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaJan 12, 2018This 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. -
Progressive familial heart block, type 1A Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaJan 12, 2018This 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. -
Congenital long QT syndrome Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaJun 14, 2016- -
Long QT syndrome 3 Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaJan 12, 2018This 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. -
Cardiovascular phenotype Benign:1
Likely benign, criteria provided, single submitterclinical testingAmbry GeneticsSep 28, 2018This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -
Cardiac arrhythmia Benign:1
Likely benign, criteria provided, single submitterclinical testingColor Diagnostics, LLC DBA Color HealthJun 18, 2018- -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
BayesDel_noAF
Benign
-0.43
CADD
Benign
8.7
DANN
Benign
0.82

Splicing

Name
Calibrated prediction
Score
Prediction
dbscSNV1_ADA
Benign
0.00050
dbscSNV1_RF
Benign
0.018
SpliceAI score (max)
0.010
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.

Other links and lift over

dbSNP: rs72549411; hg19: chr3-38627537; API