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rs45455099

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4_StrongBP6

The NM_001099404.2(SCN5A):c.2437-13C>T variant causes a splice polypyrimidine tract, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00104 in 1,604,138 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00077 ( 0 hom., cov: 32)
Exomes 𝑓: 0.0011 ( 2 hom. )

Consequence

SCN5A
NM_001099404.2 splice_polypyrimidine_tract, intron

Scores

2

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5B:12

Conservation

PhyloP100: 1.69
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 -5 ACMG points.

BP4
Computational evidence support a benign effect (BayesDel_noAF=-0.75).
BP6
Variant 3-38586054-G-A is Benign according to our data. Variant chr3-38586054-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 165150.We mark this variant Likely_benign, oryginal submissions are: {Benign=3, Likely_benign=4, Uncertain_significance=5}. Variant chr3-38586054-G-A is described in Lovd as [Benign]. Variant chr3-38586054-G-A is described in Lovd as [Likely_benign].

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE UniProt
SCN5ANM_000335.5 linkuse as main transcriptc.2437-13C>T splice_polypyrimidine_tract_variant, intron_variant ENST00000423572.7
SCN5ANM_001099404.2 linkuse as main transcriptc.2437-13C>T splice_polypyrimidine_tract_variant, intron_variant ENST00000413689.6

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Appris UniProt
SCN5AENST00000413689.6 linkuse as main transcriptc.2437-13C>T splice_polypyrimidine_tract_variant, intron_variant 5 NM_001099404.2 P4
SCN5AENST00000423572.7 linkuse as main transcriptc.2437-13C>T splice_polypyrimidine_tract_variant, intron_variant 1 NM_000335.5 A1Q14524-2

Frequencies

GnomAD3 genomes
AF:
0.000769
AC:
117
AN:
152084
Hom.:
0
Cov.:
32
show subpopulations
Gnomad AFR
AF:
0.000169
Gnomad AMI
AF:
0.00
Gnomad AMR
AF:
0.000393
Gnomad ASJ
AF:
0.00
Gnomad EAS
AF:
0.00
Gnomad SAS
AF:
0.000415
Gnomad FIN
AF:
0.000283
Gnomad MID
AF:
0.00633
Gnomad NFE
AF:
0.00140
Gnomad OTH
AF:
0.000956
GnomAD3 exomes
AF:
0.000890
AC:
217
AN:
243782
Hom.:
1
AF XY:
0.000961
AC XY:
127
AN XY:
132182
show subpopulations
Gnomad AFR exome
AF:
0.000392
Gnomad AMR exome
AF:
0.00108
Gnomad ASJ exome
AF:
0.000102
Gnomad EAS exome
AF:
0.00
Gnomad SAS exome
AF:
0.000400
Gnomad FIN exome
AF:
0.000234
Gnomad NFE exome
AF:
0.00139
Gnomad OTH exome
AF:
0.000668
GnomAD4 exome
AF:
0.00107
AC:
1556
AN:
1451936
Hom.:
2
Cov.:
33
AF XY:
0.00109
AC XY:
787
AN XY:
721682
show subpopulations
Gnomad4 AFR exome
AF:
0.000180
Gnomad4 AMR exome
AF:
0.00106
Gnomad4 ASJ exome
AF:
0.00
Gnomad4 EAS exome
AF:
0.00
Gnomad4 SAS exome
AF:
0.000397
Gnomad4 FIN exome
AF:
0.000451
Gnomad4 NFE exome
AF:
0.00124
Gnomad4 OTH exome
AF:
0.00115
GnomAD4 genome
AF:
0.000769
AC:
117
AN:
152202
Hom.:
0
Cov.:
32
AF XY:
0.000726
AC XY:
54
AN XY:
74406
show subpopulations
Gnomad4 AFR
AF:
0.000169
Gnomad4 AMR
AF:
0.000392
Gnomad4 ASJ
AF:
0.00
Gnomad4 EAS
AF:
0.00
Gnomad4 SAS
AF:
0.000416
Gnomad4 FIN
AF:
0.000283
Gnomad4 NFE
AF:
0.00140
Gnomad4 OTH
AF:
0.000946
Alfa
AF:
0.000538
Hom.:
0
Bravo
AF:
0.000801

ClinVar

Significance: Conflicting classifications of pathogenicity
Submissions summary: Uncertain:5Benign:12
Revision: criteria provided, conflicting classifications
LINK: link

Submissions by phenotype

not provided Benign:5
Benign, criteria provided, single submitterclinical testingGeneDxMar 03, 2015- -
Likely benign, no assertion criteria providedclinical testingDiagnostic Laboratory, Department of Genetics, University Medical Center Groningen-- -
Benign, criteria provided, single submitterclinical testingInvitaeJan 31, 2024- -
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-- -
not specified Benign:4
Benign, no assertion criteria providedclinical testingClinical Genetics, Academic Medical Center-- -
Likely benign, criteria provided, single submitterclinical testingLaboratory for Molecular Medicine, Mass General Brigham Personalized MedicineApr 15, 2015c.2437-13C>T in intron 16 of SCN5A: This variant is not expected to have clinic al significance because a C>T change at this position does not diverge from the splice consensus sequence and is therefore unlikely to impact splicing. It has b een identified in 0.1% (89/57696) of European chromosomes by the Exome Aggregati on Consortium (ExAC, http://exac.broadinstitute.org; dbSNP rs45455099). -
Benign, criteria provided, single submitterclinical testingWomen's Health and Genetics/Laboratory Corporation of America, LabCorpMar 25, 2021Variant summary: SCN5A c.2437-13C>T alters a non-conserved nucleotide located close to a canonical splice site and therefore could affect mRNA splicing, leading to a significantly altered protein sequence. 4/4 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.00089 in 243782 control chromosomes, predominantly at a frequency of 0.0014 within the Non-Finnish European subpopulation in the gnomAD database. The observed variant frequency within Non-Finnish European control individuals in the gnomAD database is approximately 14 fold of the estimated maximal expected allele frequency for a pathogenic variant in SCN5A causing Arrhythmia phenotype (0.0001), strongly suggesting that the variant is a benign polymorphism found primarily in populations of Non-Finnish European origin. c.2437-13C>T has been reported in the literature (example: Millat_2009, McNair_2011). These reports however, 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. Four ClinVar submitters (evaluation after 2014) cite the variant as likely benign (n=3) or uncertain significance (n=1). Based on the evidence outlined above, the variant was classified as benign. -
Benign, no assertion criteria providedclinical testingJoint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+-- -
Cardiac arrhythmia Benign:2
Likely benign, criteria provided, single submitterclinical testingAll of Us Research Program, National Institutes of HealthFeb 05, 2024- -
Likely benign, criteria provided, single submitterclinical testingColor Diagnostics, LLC DBA Color HealthJul 22, 2018- -
Brugada syndrome 1 Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaJan 13, 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 13, 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 13, 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. -
Sick sinus syndrome 1 Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaJan 13, 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 13, 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. -
Long QT syndrome 3 Benign:1
Likely benign, criteria provided, single submitterclinical testingIllumina Laboratory Services, IlluminaJan 13, 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 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: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
BayesDel_noAF
Benign
-0.75
Cadd
Benign
15
Dann
Benign
0.83

Splicing

Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
0.0
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: rs45455099; hg19: chr3-38627545; API