rs139815570

Variant names:

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 1P and 9B. PP3BP6BS1BS2

The NM_001040142.2(SCN2A):c.1269G>A(p.Val423Val) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00125 in 1,613,810 control chromosomes in the GnomAD database, including 26 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 0.0062 ( 16 hom., cov: 33)

Exomes 𝑓: 0.00074 ( 10 hom. )

Consequence

SCN2A
NM_001040142.2 synonymous

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:6

Conservation

PhyloP100: 0.528

Variant links:

Genes affected

SCN2A (HGNC:10588): (sodium voltage-gated channel alpha subunit 2) Voltage-gated sodium channels are transmembrane glycoprotein complexes composed of a large alpha subunit with four repeat domains, each of which is composed of six membrane-spanning segments, and one or more regulatory beta subunits. Voltage-gated sodium channels function in the generation and propagation of action potentials in neurons and muscle. This gene encodes one member of the sodium channel alpha subunit gene family. Allelic variants of this gene are associated with seizure disorders and autism spectrum disorder. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2016]

SCN2A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

PP3

Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

BP6

Variant 2-165313994-G-A is Benign according to our data. Variant chr2-165313994-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 130211.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Benign=5, Uncertain_significance=1}. Variant chr2-165313994-G-A is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0062 (943/152172) while in subpopulation AFR AF= 0.0207 (860/41540). AF 95% confidence interval is 0.0196. There are 16 homozygotes in gnomad4. There are 439 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High AC in GnomAd4 at 943 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SCN2A	NM_001040142.2 link	c.1269G>A	p.Val423Val	synonymous_variant	Exon 10 of 27	ENST00000375437.7	NP_001035232.1	Q99250-1
SCN2A	NM_001371246.1 link	c.1269G>A	p.Val423Val	synonymous_variant	Exon 10 of 27	ENST00000631182.3	NP_001358175.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SCN2A	ENST00000375437.7 link	c.1269G>A	p.Val423Val	synonymous_variant	Exon 10 of 27	5	NM_001040142.2	ENSP00000364586.2	Q99250-1
SCN2A	ENST00000631182.3 link	c.1269G>A	p.Val423Val	synonymous_variant	Exon 10 of 27	5	NM_001371246.1	ENSP00000486885.1	Q99250-2
SCN2A	ENST00000283256.10 link	c.1269G>A	p.Val423Val	synonymous_variant	Exon 10 of 27	1		ENSP00000283256.6	Q99250-1
SCN2A	ENST00000424833.5 link	c.1269G>A	p.Val423Val	synonymous_variant	Exon 10 of 11	1		ENSP00000406454.2	F6U291

Frequencies

GnomAD3 genomes

AF:

0.00615

AC:

935

AN:

152054

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0206

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00328

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.000250

Gnomad OTH

AF:

0.00621

GnomAD3 exomes

AF:

0.00168

AC:

421

AN:

251288

Hom.:

AF XY:

0.00130

AC XY:

176

AN XY:

135794

show subpopulations

Gnomad AFR exome

AF:

0.0211

Gnomad AMR exome

AF:

0.00130

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000229

Gnomad OTH exome

AF:

0.00114

GnomAD4 exome

AF:

0.000739

AC:

1080

AN:

1461638

Hom.:

Cov.:

AF XY:

0.000686

AC XY:

499

AN XY:

727118

show subpopulations

Gnomad4 AFR exome

AF:

0.0208

Gnomad4 AMR exome

AF:

0.00136

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000928

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000161

Gnomad4 OTH exome

AF:

0.00179

GnomAD4 genome

AF:

0.00620

AC:

943

AN:

152172

Hom.:

Cov.:

AF XY:

0.00590

AC XY:

439

AN XY:

74388

show subpopulations

Gnomad4 AFR

AF:

0.0207

Gnomad4 AMR

AF:

0.00328

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000250

Gnomad4 OTH

AF:

0.00615

Alfa

AF:

0.00348

Hom.:

Bravo

AF:

0.00699

Asia WGS

AF:

0.00202

AC:

AN:

3478

EpiCase

AF:

0.000655

EpiControl

AF:

0.000119

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:6

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Benign:2

Jul 05, 2024

Athena Diagnostics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jan 15, 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. -

not provided

Uncertain:1

Apr 15, 2013

Genetic Services Laboratory, University of Chicago

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Inborn genetic diseases

Benign:1

Jun 18, 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. -

Seizures, benign familial infantile, 3;C3150987:Developmental and epileptic encephalopathy, 11;C5394520:Episodic ataxia, type 9

Benign:1

Aug 18, 2022

Center for Genomics, Ann and Robert H. Lurie Children's Hospital of Chicago

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant has not been reported in the literature but is present in the Genome Aggregation Database (Highest reported MAF 2% (852/41418) including 16 homozygotes (https://gnomad.broadinstitute.org/variant/2-165313994-G-A?dataset=gnomad_r3). This variant is present in ClinVar with several labs classifying this variant as Benign (Variation ID:130211). Evolutionary conservation and computational predictive tools for this variant are limited or unavailable. Of note, this variant is a silent variant and does not change the amino acid, reducing the probability that this variant is disease causing. In summary, data on this variant suggests that this variant does not cause disease but requires further evidence. Therefore, this variant is classified as likely benign. -

Seizures, benign familial infantile, 3;C3150987:Developmental and epileptic encephalopathy, 11

Benign:1

Jan 30, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Seizures, benign familial infantile, 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.40

CADD

Benign

DANN

Benign

0.68

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.70

Details are displayed if max score is > 0.2

DS_AG_spliceai

0.70

Position offset: 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.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over