2-166251835-C-A

Position:

chr2-166251835-C-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001365536.1(SCN9A):c.3402G>T(p.Leu1134Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000539 in 1,612,628 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00052 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00054 ( 1 hom. )

Consequence

SCN9A
NM_001365536.1 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:6O:1

Conservation

PhyloP100: -1.68

Variant links:

Genes affected

SCN9A (HGNC:10597): (sodium voltage-gated channel alpha subunit 9) This gene encodes a voltage-gated sodium channel which plays a significant role in nociception signaling. Mutations in this gene have been associated with primary erythermalgia, channelopathy-associated insensitivity to pain, and paroxysmal extreme pain disorder. [provided by RefSeq, Aug 2009]

SCN9A links:

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

SCN1A-AS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.016005754).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SCN9A	NM_001365536.1 linkuse as main transcript	c.3402G>T	p.Leu1134Phe	missense_variant	18/27	ENST00000642356.2
SCN1A-AS1	NR_110260.1 linkuse as main transcript	n.792C>A		non_coding_transcript_exon_variant	7/12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SCN9A	ENST00000642356.2 linkuse as main transcript	c.3402G>T	p.Leu1134Phe	missense_variant	18/27		NM_001365536.1	P1	Q15858-1
SCN1A-AS1	ENST00000651574.1 linkuse as main transcript	n.1470C>A		non_coding_transcript_exon_variant	14/19

Frequencies

GnomAD3 genomes

AF:

0.000520

AC:

AN:

151996

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000460

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00123

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000795

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000431

AC:

107

AN:

248186

Hom.:

AF XY:

0.000416

AC XY:

AN XY:

134628

show subpopulations

Gnomad AFR exome

AF:

0.000194

Gnomad AMR exome

AF:

0.000320

Gnomad ASJ exome

AF:

0.000199

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00135

Gnomad NFE exome

AF:

0.000552

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000542

AC:

791

AN:

1460514

Hom.:

Cov.:

AF XY:

0.000538

AC XY:

391

AN XY:

726528

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.000314

Gnomad4 ASJ exome

AF:

0.000115

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.000956

Gnomad4 NFE exome

AF:

0.000629

Gnomad4 OTH exome

AF:

0.000381

GnomAD4 genome

AF:

0.000519

AC:

AN:

152114

Hom.:

Cov.:

AF XY:

0.000632

AC XY:

AN XY:

74360

show subpopulations

Gnomad4 AFR

AF:

0.000120

Gnomad4 AMR

AF:

0.000459

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00123

Gnomad4 NFE

AF:

0.000795

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000651

Hom.:

Bravo

AF:

0.000510

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000778

AC:

ESP6500AA

AF:

0.000262

AC:

ESP6500EA

AF:

0.000364

AC:

ExAC

AF:

0.000273

AC:

EpiCase

AF:

0.000491

EpiControl

AF:

0.000771

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:6Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:1

Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Aug 01, 2024	SCN9A: BP4 -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Aug 21, 2023	Reported in a patient with a clinical diagnosis of Dravet syndrome who had a variant in the SCN1A gene that may have been responsible for the phenotype (Singh et al., 2009); Reported in 3 individuals with autism spectrum disorder and was not detected in 1126 control individuals; however, additional information was not provided (Rubinstein et al., 2016); Reported in a patient with a clinical diagnosis of CMT2 who had a duplication of the PMP22 gene that may have been responsible for the phenotype (Antoniadi et al., 2015); In silico analysis supports that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 19763161, 27956748, 28488083, 26392352) -

Channelopathy-associated congenital insensitivity to pain, autosomal recessive

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 28, 2017

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

- -

Primary erythromelalgia

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 28, 2017

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases was too high to be consistent with this variant causing disease. Therefore, this variant is classified as benign. -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 26, 2024

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. -

Generalized epilepsy with febrile seizures plus, type 7;C2752089:Neuropathy, hereditary sensory and autonomic, type 2A

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 25, 2024

- -

Paroxysmal extreme pain disorder

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 28, 2017

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases was too high to be consistent with this variant causing disease. Therefore, this variant is classified as benign. -

Primary erythromelalgia;C1833661:Paroxysmal extreme pain disorder;C1855739:Channelopathy-associated congenital insensitivity to pain, autosomal recessive;C2752089:Neuropathy, hereditary sensory and autonomic, type 2A

Other:1

not provided, no classification provided

phenotyping only

GenomeConnect, ClinGen

Variant interpreted as Uncertain significance and reported on 04-01-2020 by Lab or GTR ID 26957. GenomeConnect assertions are reported exactly as they appear on the patient-provided report from the testing laboratory. GenomeConnect staff make no attempt to reinterpret the clinical significance of the variant. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.081

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.42

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.27

.;T;.;.;T;.

Eigen

Benign

-0.99

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.073

LIST_S2

Benign

0.65

T;.;T;T;T;T

M_CAP

Benign

0.045

MetaRNN

Benign

0.016

T;T;T;T;T;T

MetaSVM

Benign

-0.52

MutationAssessor

Benign

1.9

.;L;.;.;L;L

MutationTaster

Benign

1.0

N;N;N;N

PrimateAI

Benign

0.30

PROVEAN

Benign

-1.5

N;.;.;.;.;N

REVEL

Benign

0.18

Sift

Benign

0.35

T;.;.;.;.;T

Sift4G

Benign

0.078

T;T;.;.;.;T

Vest4

0.14

MutPred

0.43

Loss of helix (P = 0.2662);.;Loss of helix (P = 0.2662);Loss of helix (P = 0.2662);.;.;

MVP

0.44

MPC

0.13

ClinPred

0.022

GERP RS

-2.2

Varity_R

0.15

gMVP

0.17

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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