Genetic Variant SCN9A:p.Ser535* (chr2-166284823-G-C) – ACMG Classification: Pathogenic (11 pts)

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PVS1PM2PP3

The NM_001365536.1(SCN9A):c.1604C>G(p.Ser535*) variant causes a stop gained, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000069 in 1,448,406 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

SCN9A
NM_001365536.1 stop_gained, splice_region

Scores

Splicing: ADA: 0.9866

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 9.52

Publications

0 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:

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ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 11 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP3

Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. No scorers claiming Uncertain. Scorers claiming Benign: max_spliceai.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001365536.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
SCN9A	NM_001365536.1	MANE Select	c.1604C>G	p.Ser535*	stop_gained splice_region	Exon 12 of 27	NP_001352465.1
SCN9A	NM_002977.4		c.1604C>G	p.Ser535*	stop_gained splice_region	Exon 12 of 27	NP_002968.2
SCN1A-AS1	NR_110260.1		n.1029+7576G>C		intron	N/A

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
SCN9A	ENST00000642356.2	MANE Select	c.1604C>G	p.Ser535*	stop_gained splice_region	Exon 12 of 27	ENSP00000495601.1
SCN9A	ENST00000303354.11	TSL:5	c.1604C>G	p.Ser535*	stop_gained splice_region	Exon 12 of 27	ENSP00000304748.7
SCN9A	ENST00000409672.5	TSL:5	c.1604C>G	p.Ser535*	stop_gained splice_region	Exon 12 of 27	ENSP00000386306.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.90e-7

AC:

AN:

1448406

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

720096

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32850

American (AMR)

AF:

0.00

AC:

AN:

42698

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25734

East Asian (EAS)

AF:

0.00

AC:

AN:

39520

South Asian (SAS)

AF:

0.00

AC:

AN:

84896

European-Finnish (FIN)

AF:

0.00

AC:

AN:

49572

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5708

European-Non Finnish (NFE)

AF:

9.03e-7

AC:

AN:

1107566

Other (OTH)

AF:

0.00

AC:

AN:

59862

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.62

BayesDel_noAF

Pathogenic

0.66

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

Eigen

Pathogenic

1.2

Eigen_PC

Pathogenic

1.1

FATHMM_MKL

Pathogenic

1.0

PhyloP100

9.5

Vest4

0.97

GERP RS

5.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Mutation Taster

=0/200

disease causing (fs/PTC)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

0.99

dbscSNV1_RF

Pathogenic

0.84

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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over