rs771227297

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PP3_Strong

The NM_001365536.1(SCN9A):c.560C>T(p.Pro187Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000155 in 1,613,162 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P187T) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000015 ( 0 hom. )

Consequence

SCN9A
NM_001365536.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 10.0

Publications

3 publications found

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 was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.952

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SCN9A	NM_001365536.1 link	c.560C>T	p.Pro187Leu	missense_variant	Exon 5 of 27	ENST00000642356.2	NP_001352465.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SCN9A	ENST00000642356.2 link	c.560C>T	p.Pro187Leu	missense_variant	Exon 5 of 27		NM_001365536.1	ENSP00000495601.1	Q15858-1
SCN9A	ENST00000303354.11 link	c.560C>T	p.Pro187Leu	missense_variant	Exon 5 of 27	5		ENSP00000304748.7	Q15858-1
SCN9A	ENST00000409672.5 link	c.560C>T	p.Pro187Leu	missense_variant	Exon 5 of 27	5		ENSP00000386306.1	Q15858-3
SCN9A	ENST00000645907.1 link	c.560C>T	p.Pro187Leu	missense_variant	Exon 5 of 27			ENSP00000495983.1	Q15858-4
SCN9A	ENST00000454569.6 link	c.560C>T	p.Pro187Leu	missense_variant	Exon 5 of 15	1		ENSP00000413212.2	A0A0C4DG82
SCN9A	ENST00000452182.2 link	c.560C>T	p.Pro187Leu	missense_variant	Exon 6 of 11	1		ENSP00000393141.2	H7C064

Frequencies

GnomAD3 genomes

AF:

0.0000198

AC:

AN:

151802

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000208

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000120

AC:

AN:

249028

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000290

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000177

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000151

AC:

AN:

1461360

Hom.:

Cov.:

AF XY:

0.0000110

AC XY:

AN XY:

726962

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33464

American (AMR)

AF:

0.0000224

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26128

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39684

South Asian (SAS)

AF:

0.00

AC:

AN:

86234

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53398

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000171

AC:

AN:

1111608

Other (OTH)

AF:

0.00

AC:

AN:

60360

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.459

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000198

AC:

AN:

151802

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74126

show subpopulations

African (AFR)

AF:

0.0000242

AC:

AN:

41318

American (AMR)

AF:

0.00

AC:

AN:

15208

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5188

South Asian (SAS)

AF:

0.000208

AC:

AN:

4810

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10556

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

67938

Other (OTH)

AF:

0.00

AC:

AN:

2086

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.508

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000330

Hom.:

Bravo

AF:

0.0000264

ExAC

AF:

0.0000166

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

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

Uncertain:1

Jun 21, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 187 of the SCN9A protein (p.Pro187Leu). This variant is present in population databases (rs771227297, gnomAD 0.003%). This missense change has been observed in individual(s) with erythromelalgia (PMID: 29911575). ClinVar contains an entry for this variant (Variation ID: 574441). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on SCN9A protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

not provided

Uncertain:1

Jul 14, 2019

Mayo Clinic Laboratories, Mayo Clinic

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Generalized epilepsy with febrile seizures plus, type 7

Uncertain:1

Jun 03, 2020

New York Genome Center

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The de novo c.560C>T (p.Pro187Leu) variant identified in the SCN9A gene substitutes a well conserved Proline for Leucine at amino acid 187/1978 (coding exon 5/27). This variant is found with low frequency in gnomAD(v3.0) (3 heterozygotes, 0 homozygotes; allele frequency 2.1e-5) suggesting it is not a common benign variant in the populations represented in that database. In silico algorithms predict this variant to be Deleterious (Provean; score: -9.6), Damaging (SIFT; score:0.000) and Pathogenic (REVEL; score:0.7919) to the function of the canonical transcript. This variant is reported as a Variant of Uncertain Significance in ClinVar (VarID:57441), and to our current knowledge has not been reported in any individuals with SCN9A associated seizure disorder. The p.Pro187Leu variant has however been reported in a 71y female with Erythermalgia, although it is unclear if that individual had a history of seizures [PMID:29911575]. SCN9A is a transmembrane protein, and the p.Pro187 residue is predicted to be the last amino acid within the cytoplasmic loop at the S3 repeat of transmembrane domain 1 (UniProtKB: Q15858). While it is identified de novo in this individual, its presence in control and non-neuro population databases (gnomADv2.1.1, rs771227297) and observation in an individual in association with Erythromelalgia leaves some uncertainty regarding its role in SCN9A associated seizure disorder. The c.560C>T (p.Pro187Leu) variant identified in the SCN9A gene is therefore classified here as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.73

BayesDel_addAF

Pathogenic

0.36

BayesDel_noAF

Pathogenic

0.36

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.84

.;D;.;.;D;.;.;.

Eigen

Uncertain

0.62

Eigen_PC

Uncertain

0.57

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.93

D;.;D;D;D;D;D;D

M_CAP

Pathogenic

0.35

MetaRNN

Pathogenic

0.95

D;D;D;D;D;D;D;D

MetaSVM

Pathogenic

1.1

MutationAssessor

Pathogenic

3.2

M;M;M;.;M;M;.;.

PhyloP100

PrimateAI

Uncertain

0.73

PROVEAN

Pathogenic

-9.6

D;.;.;.;.;D;.;.

REVEL

Pathogenic

0.79

Sift

Pathogenic

0.0

D;.;.;.;.;D;.;.

Sift4G

Uncertain

0.035

D;D;.;.;.;D;.;.

Polyphen

1.0

.;D;.;.;D;.;.;.

Vest4

0.83

MVP

0.90

MPC

0.56

ClinPred

1.0

GERP RS

5.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.88

gMVP

0.93

Mutation Taster

=8/92

disease causing

(source)

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

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rs771227297

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over