rs199692186

Positions:

chr2-166272748-T-C

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBP6

The NM_001365536.1(SCN9A):c.3002A>G(p.Tyr1001Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000704 in 1,561,280 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 0.00055 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00072 ( 0 hom. )

Consequence

SCN9A
NM_001365536.1 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1U:9B:7

Conservation

PhyloP100: 1.83

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 -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.01835671).

BP6

Variant 2-166272748-T-C is Benign according to our data. Variant chr2-166272748-T-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 130260.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=6, Likely_benign=5, Benign=2}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SCN9A	NM_001365536.1 link	c.3002A>G	p.Tyr1001Cys	missense_variant	17/27	ENST00000642356.2	NP_001352465.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
SCN9A	ENST00000642356.2 link	c.3002A>G	p.Tyr1001Cys	missense_variant	17/27		NM_001365536.1	ENSP00000495601.1	Q15858-1
SCN9A	ENST00000303354.11 link	c.3002A>G	p.Tyr1001Cys	missense_variant	17/27	5		ENSP00000304748.7	Q15858-1
SCN9A	ENST00000409672.5 link	c.2969A>G	p.Tyr990Cys	missense_variant	17/27	5		ENSP00000386306.1	Q15858-3
SCN9A	ENST00000645907.1 link	c.2969A>G	p.Tyr990Cys	missense_variant	17/27			ENSP00000495983.1	Q15858-4

Frequencies

GnomAD3 genomes

AF:

0.000547

AC:

AN:

151856

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000725

Gnomad AMI

AF:

0.0121

Gnomad AMR

AF:

0.000132

Gnomad ASJ

AF:

0.00432

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000750

Gnomad OTH

AF:

0.000480

GnomAD3 exomes

AF:

0.000634

AC:

130

AN:

205034

Hom.:

AF XY:

0.000590

AC XY:

AN XY:

110138

show subpopulations

Gnomad AFR exome

AF:

0.000135

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00513

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000499

Gnomad FIN exome

AF:

0.000266

Gnomad NFE exome

AF:

0.000856

Gnomad OTH exome

AF:

0.00127

GnomAD4 exome

AF:

0.000721

AC:

1016

AN:

1409424

Hom.:

Cov.:

AF XY:

0.000731

AC XY:

509

AN XY:

696032

show subpopulations

Gnomad4 AFR exome

AF:

0.000159

Gnomad4 AMR exome

AF:

0.0000840

Gnomad4 ASJ exome

AF:

0.00458

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000921

Gnomad4 FIN exome

AF:

0.000175

Gnomad4 NFE exome

AF:

0.000788

Gnomad4 OTH exome

AF:

0.000500

GnomAD4 genome

AF:

0.000547

AC:

AN:

151856

Hom.:

Cov.:

AF XY:

0.000553

AC XY:

AN XY:

74100

show subpopulations

Gnomad4 AFR

AF:

0.0000725

Gnomad4 AMR

AF:

0.000132

Gnomad4 ASJ

AF:

0.00432

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000750

Gnomad4 OTH

AF:

0.000480

Alfa

AF:

0.000965

Hom.:

Bravo

AF:

0.000620

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.000276

AC:

ESP6500EA

AF:

0.00111

AC:

ExAC

AF:

0.000580

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:9Benign:7

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:7Benign:1

Uncertain significance, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Nov 03, 2016	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Aug 27, 2013	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Sep 01, 2024	SCN9A: BP4 -
Uncertain significance, no assertion criteria provided	clinical testing	Department of Pathology and Laboratory Medicine, Sinai Health System	-	The SCN9A p.Tyr990Cys variant was identified in 3 of 3192 proband chromosomes (frequency: 0.00094; one compound heterozygote and two heterozygotes) from individuals with peripheral neuropathy (Wadhawan_2017_PMID_29264398; Eijkenboom_2018_PMID_30554136). The variant was identified in dbSNP (ID: rs199692186) and ClinVar (classified as likely benign by PreventionGenetics, Invitae and Illumina, and as uncertain significance by GeneDx, EGL Genetic Diagnostics and Genetic Services Laboratory, University of Chicago, and classified as pathogenic by Bioinformatics Core Luxembourg Center for Systems Biomedicine). The variant was identified in control databases in 143 of 236408 chromosomes at a frequency of 0.0006049 increasing the likelihood this could be a low frequency benign variant (Genome Aggregation Database March 6, 2019, v2.1.1). The variant was observed in the following populations: Ashkenazi Jewish in 35 of 6532 chromosomes (freq: 0.005358), Other in 7 of 5826 chromosomes (freq: 0.001202), European (non-Finnish) in 92 of 113582 chromosomes (freq: 0.00081), European (Finnish) in 5 of 22294 chromosomes (freq: 0.000224), African in 3 of 23534 chromosomes (freq: 0.000128) and South Asian in 1 of 20024 chromosomes (freq: 0.00005), but was not observed in the Latino or East Asian populations. The p.Tyr990 residue is conserved in mammals and computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) provide inconsistent predictions regarding the impact to the protein; this information is not very predictive of pathogenicity. The variant occurs outside of the splicing consensus sequence and in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer) do not predict a difference in splicing. In summary, based on the above information the clinical significance of this variant cannot be determined with certainty at this time. This variant is classified as a variant of uncertain significance. -
Uncertain significance, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	Oct 12, 2020	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Dec 13, 2024	Reported in two individuals with Rolandic epilepsy in published literature; however, no additional information was provided (PMID: 29358611); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 29358611, 30554136) -

Primary erythromelalgia

Uncertain:1Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Pittsburgh Clinical Genomics Laboratory, University of Pittsburgh Medical Center	Apr 10, 2024	This sequence variant is a single nucleotide substitution (A>G) at position 3002 of the coding sequence of the SCN9A gene that results in a tyrosine to cysteine amino acid change at residue 1001 of the sodium voltage-gated channel alpha subunit 9 protein. The 1001 residue falls in the cytoplasmic domain between domains II and III (PMID: 20635406). This is a previously reported variant (ClinVar 130260) that has been observed in individuals affected by small fiber neuropathy or Rolandic epilepsy (PMID: 30554136, 37079850, 29358611). In addition, this variant has a been observed in unaffected control cohorts (PMID: 29358611). This variant is present in 213 of 356890 alleles (0.0597%) in the gnomAD population dataset. The frequent observation of this variant in a control population may be the result of incomplete penetrance (PMID: 37079850). Multiple bioinformatic tools provide conflicting predictions concerning the impact of this variant, though this residue is highly conserved across the vertebrate species examined. Studies examining the functional consequence of this variant have not been published, to our knowledge. Based upon the evidence, we consider this a variant of uncertain significance. ACMG Criteria: -
Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 12, 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. -

Self-limited epilepsy with centrotemporal spikes

Pathogenic:1

Pathogenic, no assertion criteria provided

case-control

Bioinformatics Core, Luxembourg Center for Systems Biomedicine

Jan 01, 2017

CAADphred>15 -

Channelopathy-associated congenital insensitivity to pain, autosomal recessive

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

- -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 29, 2019

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

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 27, 2024

- -

Small fiber neuropathy

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Paroxysmal extreme pain disorder

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 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

AlphaMissense

Benign

0.096

BayesDel_addAF

Benign

-0.072

BayesDel_noAF

Uncertain

0.050

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.61

.;D;.;.;D;.

Eigen

Benign

0.024

Eigen_PC

Benign

0.057

FATHMM_MKL

Benign

0.49

LIST_S2

Benign

0.81

T;.;T;T;T;T

M_CAP

Uncertain

0.11

MetaRNN

Benign

0.018

T;T;T;T;T;T

MetaSVM

Uncertain

-0.18

MutationAssessor

Uncertain

2.5

.;M;.;.;M;M

PrimateAI

Benign

0.42

PROVEAN

Pathogenic

-5.7

D;.;.;.;.;D

REVEL

Uncertain

0.49

Sift

Pathogenic

0.0

D;.;.;.;.;D

Sift4G

Uncertain

0.052

T;T;.;.;.;T

Vest4

0.72

MVP

0.73

MPC

0.62

ClinPred

0.13

GERP RS

5.4

Varity_R

0.53

gMVP

0.54

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