rs138497939

Positions:

chr2-165389274-A-C

Variant summary

Our verdict is Benign. Variant got -10 ACMG points: 3P and 13B. PM1PP2BP4_StrongBP6BS1BS2

The NM_001040142.2(SCN2A):c.5468A>C(p.Asp1823Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000127 in 1,614,062 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D1823N) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00017 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00012 ( 1 hom. )

Consequence

SCN2A
NM_001040142.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:3

Conservation

PhyloP100: 2.89

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 -10 ACMG points.

PM1

In a topological_domain Cytoplasmic (size 229) in uniprot entity SCN2A_HUMAN there are 30 pathogenic changes around while only 7 benign (81%) in NM_001040142.2

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), SCN2A. . Trascript score misZ 8.7114 (greater than threshold 3.09). GenCC has associacion of gene with seizures, benign familial infantile, 3, Dravet syndrome, benign familial neonatal-infantile seizures, malignant migrating partial seizures of infancy, complex neurodevelopmental disorder, developmental and epileptic encephalopathy, 11, developmental and epileptic encephalopathy, West syndrome, benign familial infantile epilepsy, episodic ataxia, type 9.

BP4

Computational evidence support a benign effect (MetaRNN=0.012391925).

BP6

Variant 2-165389274-A-C is Benign according to our data. Variant chr2-165389274-A-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 212131.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=2, Benign=1}. Variant chr2-165389274-A-C is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.000171 (26/152218) while in subpopulation EAS AF= 0.00155 (8/5178). AF 95% confidence interval is 0.000768. There are 0 homozygotes in gnomad4. There are 14 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High AC in GnomAd4 at 26 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SCN2A	NM_001040142.2 linkuse as main transcript	c.5468A>C	p.Asp1823Ala	missense_variant	27/27	ENST00000375437.7
SCN2A	NM_001371246.1 linkuse as main transcript	c.5468A>C	p.Asp1823Ala	missense_variant	27/27	ENST00000631182.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SCN2A	ENST00000375437.7 linkuse as main transcript	c.5468A>C	p.Asp1823Ala	missense_variant	27/27	5	NM_001040142.2	P1	Q99250-1
SCN2A	ENST00000631182.3 linkuse as main transcript	c.5468A>C	p.Asp1823Ala	missense_variant	27/27	5	NM_001371246.1		Q99250-2

Frequencies

GnomAD3 genomes

AF:

0.000171

AC:

AN:

152100

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000966

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00154

Gnomad SAS

AF:

0.000622

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000263

AC:

AN:

251248

Hom.:

AF XY:

0.000280

AC XY:

AN XY:

135792

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00256

Gnomad SAS exome

AF:

0.0000980

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.000132

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000122

AC:

179

AN:

1461844

Hom.:

Cov.:

AF XY:

0.000133

AC XY:

AN XY:

727220

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00141

Gnomad4 SAS exome

AF:

0.000185

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.0000863

Gnomad4 OTH exome

AF:

0.000166

GnomAD4 genome

AF:

0.000171

AC:

AN:

152218

Hom.:

Cov.:

AF XY:

0.000188

AC XY:

AN XY:

74410

show subpopulations

Gnomad4 AFR

AF:

0.0000963

Gnomad4 AMR

AF:

0.0000655

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00154

Gnomad4 SAS

AF:

0.000623

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000959

Hom.:

Bravo

AF:

0.000178

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000181

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.000119

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genetic Services Laboratory, University of Chicago

Dec 16, 2014

- -

Developmental and epileptic encephalopathy, 11

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

New York Genome Center

Feb 24, 2021

- -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

May 19, 2017

This 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. -

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

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 22, 2024

- -

not provided

Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Jun 24, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.052

BayesDel_addAF

Benign

-0.32

BayesDel_noAF

Benign

-0.24

CADD

Benign

DANN

Benign

0.89

DEOGEN2

Uncertain

0.59

D;.;T;.;D;D;.

Eigen

Benign

-0.69

Eigen_PC

Benign

-0.52

FATHMM_MKL

Benign

0.53

LIST_S2

Benign

0.64

T;.;T;.;.;.;T

M_CAP

Benign

0.030

MetaRNN

Benign

0.012

T;T;T;T;T;T;T

MetaSVM

Uncertain

-0.25

MutationAssessor

Benign

0.67

N;N;.;N;N;N;N

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Benign

0.40

PROVEAN

Benign

-1.4

N;.;.;.;.;N;N

REVEL

Benign

0.28

Sift

Benign

1.0

T;.;.;.;.;T;T

Sift4G

Benign

0.37

T;.;.;T;.;T;T

Polyphen

0.0

B;B;.;B;B;B;B

Vest4

0.11

MVP

0.41

ClinPred

0.024

GERP RS

0.28

Varity_R

0.26

gMVP

0.96

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.

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