chr2-166311520-G-T

Variant names:

• chr2-166311520-G-T
• rs771304275
• NM_001365536.1:c.237C>A

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_001365536.1(SCN9A):​c.237C>A​(p.Asp79Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000686 in 1,458,170 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. D79D) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 24)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: SCN9A NM_001365536.1 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.245
• Publications: 0 publications found

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]

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.78

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SCN9A	NM_001365536.1	MANE Select	c.237C>A	p.Asp79Glu	missense	Exon 2 of 27	NP_001352465.1
	SCN9A	NM_002977.4		c.237C>A	p.Asp79Glu	missense	Exon 2 of 27	NP_002968.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SCN9A	ENST00000642356.2	MANE Select	c.237C>A	p.Asp79Glu	missense	Exon 2 of 27	ENSP00000495601.1
	SCN9A	ENST00000303354.11	TSL:5	c.237C>A	p.Asp79Glu	missense	Exon 2 of 27	ENSP00000304748.7
	SCN9A	ENST00000409672.5	TSL:5	c.237C>A	p.Asp79Glu	missense	Exon 2 of 27	ENSP00000386306.1

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome AF: 6.86e-7 AC: 1 AN: 1458170 Hom.: 0 Cov.: 29 AF XY: 0.00 AC XY: 0 AN XY: 725320

African (AFR) AF: 0.00 AC: 0 AN: 33332

American (AMR) AF: 0.00 AC: 0 AN: 44580

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26004

East Asian (EAS) AF: 0.00 AC: 0 AN: 39674

South Asian (SAS) AF: 0.00 AC: 0 AN: 85564

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53314

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5466

European-Non Finnish (NFE) AF: 9.01e-7 AC: 1 AN: 1110062

Other (OTH) AF: 0.00 AC: 0 AN: 60174

GnomAD4 genome Cov.: 24

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.94
BayesDel_addAF	Pathogenic	0.28	D
BayesDel_noAF	Pathogenic	0.16
CADD	Benign	18
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.72	D
Eigen	Uncertain	0.44
Eigen_PC	Uncertain	0.33
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.63	D
MetaRNN	Pathogenic	0.78	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	4.0	H
PhyloP100		0.24
PrimateAI	Uncertain	0.70	T
PROVEAN	Uncertain	-3.7	D
REVEL	Pathogenic	0.78
Sift	Uncertain	0.0060	D
Sift4G	Uncertain	0.019	D
Vest4		0.70
MutPred		0.39		Gain of disorder (P = 0.1384)
MVP		0.78
MPC		0.44
ClinPred		1.0	D
GERP RS		3.6
Varity_R		0.34
gMVP		0.54
Mutation Taster		=39/61	disease causing

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

Other links and lift over

dbSNP: rs771304275; hg19: chr2-167168030; COSMIC: COSV106101690;