rs140237315

Variant names:

Variant summary

Our verdict is Benign. The variant received -19 ACMG points: 0P and 19B. BP4_ModerateBP6_Very_StrongBP7BS1BS2

The NM_001165963.4(SCN1A):c.5418G>A(p.Glu1806Glu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0122 in 1,613,934 control chromosomes in the GnomAD database, including 240 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0096 ( 17 hom., cov: 32)

Exomes 𝑓: 0.012 ( 223 hom. )

Consequence

SCN1A
NM_001165963.4 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:15

Conservation

PhyloP100: 1.99

Publications

7 publications found

Variant links:

Genes affected

SCN1A (HGNC:10585): (sodium voltage-gated channel alpha subunit 1) Voltage-dependent sodium channels are heteromeric complexes that regulate sodium exchange between intracellular and extracellular spaces and are essential for the generation and propagation of action potentials in muscle cells and neurons. Each sodium channel is composed of a large pore-forming, glycosylated alpha subunit and two smaller beta subunits. This gene encodes a sodium channel alpha subunit, which has four homologous domains, each of which contains six transmembrane regions. Allelic variants of this gene are associated with generalized epilepsy with febrile seizures and epileptic encephalopathy. Alternative splicing results in multiple transcript variants. The RefSeq Project has decided to create four representative RefSeq records. Three of the transcript variants are supported by experimental evidence and the fourth contains alternate 5' untranslated exons, the exact combination of which have not been experimentally confirmed for the full-length transcript. [provided by RefSeq, Oct 2015]

SCN1A links:

SCN1A-AS1 (HGNC:54069): (SCN1A and SCN9A antisense RNA 1)

SCN1A-AS1 links:

LOC102724058 (HGNC:):

LOC102724058 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -19 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.41).

BP6

Variant 2-165991857-C-T is Benign according to our data. Variant chr2-165991857-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 93657.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=1.99 with no splicing effect.

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.00955 (1453/152142) while in subpopulation SAS AF = 0.0326 (157/4820). AF 95% confidence interval is 0.0284. There are 17 homozygotes in GnomAd4. There are 672 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 1453 AD,Unknown gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SCN1A	NM_001165963.4 link	c.5418G>A	p.Glu1806Glu	synonymous_variant	Exon 29 of 29	ENST00000674923.1	NP_001159435.1	P35498-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SCN1A	ENST00000674923.1 link	c.5418G>A	p.Glu1806Glu	synonymous_variant	Exon 29 of 29		NM_001165963.4	ENSP00000501589.1	P35498-1
SCN1A	ENST00000303395.9 link	c.5418G>A	p.Glu1806Glu	synonymous_variant	Exon 28 of 28	5		ENSP00000303540.4	P35498-1
SCN1A	ENST00000375405.7 link	c.5385G>A	p.Glu1795Glu	synonymous_variant	Exon 26 of 26	5		ENSP00000364554.3	P35498-2
SCN1A	ENST00000409050.2 link	c.5334G>A	p.Glu1778Glu	synonymous_variant	Exon 28 of 28	5		ENSP00000386312.1	P35498-3

Frequencies

GnomAD3 genomes

AF:

0.00956

AC:

1454

AN:

152024

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00302

Gnomad AMI

AF:

0.0318

Gnomad AMR

AF:

0.0102

Gnomad ASJ

AF:

0.0277

Gnomad EAS

AF:

0.000194

Gnomad SAS

AF:

0.0328

Gnomad FIN

AF:

0.000943

Gnomad MID

AF:

0.0854

Gnomad NFE

AF:

0.0121

Gnomad OTH

AF:

0.0158

GnomAD2 exomes

AF:

0.0136

AC:

3412

AN:

251232

AF XY:

0.0155

show subpopulations

Gnomad AFR exome

AF:

0.00258

Gnomad AMR exome

AF:

0.00749

Gnomad ASJ exome

AF:

0.0288

Gnomad EAS exome

AF:

0.000218

Gnomad FIN exome

AF:

0.00143

Gnomad NFE exome

AF:

0.0126

Gnomad OTH exome

AF:

0.0176

GnomAD4 exome

AF:

0.0125

AC:

18206

AN:

1461792

Hom.:

223

Cov.:

AF XY:

0.0135

AC XY:

9848

AN XY:

727204

show subpopulations

African (AFR)

AF:

0.00230

AC:

AN:

33468

American (AMR)

AF:

0.00821

AC:

367

AN:

44712

Ashkenazi Jewish (ASJ)

AF:

0.0298

AC:

778

AN:

26132

East Asian (EAS)

AF:

0.0000756

AC:

AN:

39696

South Asian (SAS)

AF:

0.0403

AC:

3478

AN:

86256

European-Finnish (FIN)

AF:

0.00172

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.0428

AC:

247

AN:

5768

European-Non Finnish (NFE)

AF:

0.0110

AC:

12211

AN:

1111946

Other (OTH)

AF:

0.0158

AC:

953

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.474

Heterozygous variant carriers

1296

2593

3889

5186

6482

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

462

924

1386

1848

2310

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00955

AC:

1453

AN:

152142

Hom.:

Cov.:

AF XY:

0.00903

AC XY:

672

AN XY:

74378

show subpopulations

African (AFR)

AF:

0.00301

AC:

125

AN:

41534

American (AMR)

AF:

0.0102

AC:

155

AN:

15252

Ashkenazi Jewish (ASJ)

AF:

0.0277

AC:

AN:

3470

East Asian (EAS)

AF:

0.000194

AC:

AN:

5154

South Asian (SAS)

AF:

0.0326

AC:

157

AN:

4820

European-Finnish (FIN)

AF:

0.000943

AC:

AN:

10606

Middle Eastern (MID)

AF:

0.0884

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0121

AC:

821

AN:

67986

Other (OTH)

AF:

0.0156

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

142

212

283

354

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

110

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0129

Hom.:

Bravo

AF:

0.00931

EpiCase

AF:

0.0169

EpiControl

AF:

0.0157

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:15

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:7

Feb 10, 2015

Genetic Services Laboratory, University of Chicago

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Nov 05, 2013

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This 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. -

Feb 19, 2016

Eurofins Ntd Llc (ga)

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:3

Aug 01, 2021

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Migraine, familial hemiplegic, 3

Benign:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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 benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Inborn genetic diseases

Benign:1

Mar 13, 2016

Ambry Genetics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as 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. -

Developmental and epileptic encephalopathy

Benign:1

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Generalized epilepsy with febrile seizures plus, type 2

Benign:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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. -

Epilepsy

Benign:1

Jun 14, 2016

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.41

CADD

Benign

(source)

DANN

Benign

0.48

PhyloP100

2.0

Mutation Taster

=98/2

polymorphism (auto)

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over