2-165307838-G-A

Position:

chr2-165307838-G-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1

The NM_001040142.2(SCN2A):c.387-10G>A 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 0.00362 in 1,586,860 control chromosomes in the GnomAD database, including 119 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0038 ( 12 hom., cov: 32)

Exomes 𝑓: 0.0036 ( 107 hom. )

Consequence

SCN2A
NM_001040142.2 splice_polypyrimidine_tract, intron

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:8

Conservation

PhyloP100: -1.27

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 -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.62).

BP6

Variant 2-165307838-G-A is Benign according to our data. Variant chr2-165307838-G-A is described in ClinVar as [Benign]. Clinvar id is 130221.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr2-165307838-G-A is described in Lovd as [Benign].

BA1

GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.0674 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SCN2A	NM_001040142.2 linkuse as main transcript	c.387-10G>A		splice_polypyrimidine_tract_variant, intron_variant		ENST00000375437.7	NP_001035232.1
SCN2A	NM_001371246.1 linkuse as main transcript	c.387-10G>A		splice_polypyrimidine_tract_variant, intron_variant		ENST00000631182.3	NP_001358175.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SCN2A	ENST00000375437.7 linkuse as main transcript	c.387-10G>A		splice_polypyrimidine_tract_variant, intron_variant		5	NM_001040142.2	ENSP00000364586	P1	Q99250-1
SCN2A	ENST00000631182.3 linkuse as main transcript	c.387-10G>A		splice_polypyrimidine_tract_variant, intron_variant		5	NM_001371246.1	ENSP00000486885		Q99250-2

Frequencies

GnomAD3 genomes

AF:

0.00382

AC:

581

AN:

152090

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000590

Gnomad ASJ

AF:

0.0104

Gnomad EAS

AF:

0.0738

Gnomad SAS

AF:

0.00643

Gnomad FIN

AF:

0.00321

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.00100

Gnomad OTH

AF:

0.00383

GnomAD3 exomes

AF:

0.00730

AC:

1834

AN:

251174

Hom.:

AF XY:

0.00696

AC XY:

945

AN XY:

135766

show subpopulations

Gnomad AFR exome

AF:

0.000431

Gnomad AMR exome

AF:

0.0000868

Gnomad ASJ exome

AF:

0.00745

Gnomad EAS exome

AF:

0.0739

Gnomad SAS exome

AF:

0.00438

Gnomad FIN exome

AF:

0.00333

Gnomad NFE exome

AF:

0.00142

Gnomad OTH exome

AF:

0.00376

GnomAD4 exome

AF:

0.00360

AC:

5170

AN:

1434654

Hom.:

107

Cov.:

AF XY:

0.00371

AC XY:

2655

AN XY:

715592

show subpopulations

Gnomad4 AFR exome

AF:

0.000183

Gnomad4 AMR exome

AF:

0.000246

Gnomad4 ASJ exome

AF:

0.00782

Gnomad4 EAS exome

AF:

0.0746

Gnomad4 SAS exome

AF:

0.00428

Gnomad4 FIN exome

AF:

0.00272

Gnomad4 NFE exome

AF:

0.00113

Gnomad4 OTH exome

AF:

0.00426

GnomAD4 genome

AF:

0.00380

AC:

578

AN:

152206

Hom.:

Cov.:

AF XY:

0.00460

AC XY:

342

AN XY:

74420

show subpopulations

Gnomad4 AFR

AF:

0.000241

Gnomad4 AMR

AF:

0.000589

Gnomad4 ASJ

AF:

0.0104

Gnomad4 EAS

AF:

0.0734

Gnomad4 SAS

AF:

0.00644

Gnomad4 FIN

AF:

0.00321

Gnomad4 NFE

AF:

0.00100

Gnomad4 OTH

AF:

0.00379

Alfa

AF:

0.00183

Hom.:

Bravo

AF:

0.00437

Asia WGS

AF:

0.0350

AC:

120

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Benign:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:4

Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -
Likely benign, no assertion criteria provided	clinical testing	Genetic Services Laboratory, University of Chicago	-	Likely benign based on allele frequency in 1000 Genomes Project or ESP global frequency and its presence in a patient with a rare or unrelated disease phenotype. NOT Sanger confirmed. -
Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Sep 08, 2014	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	May 17, 2013	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

Benign:2

Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Jul 05, 2019	- -

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

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 30, 2024

- -

Seizures, benign familial infantile, 3

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

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

-0.62

CADD

Benign

0.18

DANN

Benign

0.74

Splicing

Name

Calibrated prediction

Score

Prediction

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.

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