chr2-166303246-T-A

Variant names:

• chr2-166303246-T-A
• rs1553495224
• NM_001365536.1:c.745A>T

Variant summary

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

The NM_001365536.1(SCN9A):​c.745A>T​(p.Met249Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,474 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. M249V) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: SCN9A NM_001365536.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 8.02
• 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, 0.823

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SCN9A	NM_001365536.1	MANE Select	c.745A>T	p.Met249Leu	missense	Exon 7 of 27	NP_001352465.1	Q15858-1
	SCN9A	NM_002977.4		c.745A>T	p.Met249Leu	missense	Exon 7 of 27	NP_002968.2	Q15858-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SCN9A	ENST00000642356.2	MANE Select	c.745A>T	p.Met249Leu	missense	Exon 7 of 27	ENSP00000495601.1	Q15858-1
	SCN9A	ENST00000303354.11	TSL:5	c.745A>T	p.Met249Leu	missense	Exon 7 of 27	ENSP00000304748.7	Q15858-1
	SCN9A	ENST00000409672.5	TSL:5	c.745A>T	p.Met249Leu	missense	Exon 7 of 27	ENSP00000386306.1	Q15858-3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461474 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727044

African (AFR) AF: 0.00 AC: 0 AN: 33456

American (AMR) AF: 0.00 AC: 0 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26120

East Asian (EAS) AF: 0.00 AC: 0 AN: 39634

South Asian (SAS) AF: 0.00 AC: 0 AN: 86238

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53414

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111748

Other (OTH) AF: 0.00 AC: 0 AN: 60380

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Generalized epilepsy with febrile seizures plus, type 7;C2752089:Neuropathy, hereditary sensory and autonomic, type 2A (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.43
BayesDel_addAF	Pathogenic	0.48	D
BayesDel_noAF	Pathogenic	0.45
CADD	Uncertain	25
DANN	Benign	0.97
DEOGEN2	Uncertain	0.72	D
Eigen	Uncertain	0.22
Eigen_PC	Uncertain	0.41
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.83	T
M_CAP	Uncertain	0.10	D
MetaRNN	Pathogenic	0.82	D
MetaSVM	Pathogenic	0.84	D
MutationAssessor	Benign	1.4	L
PhyloP100		8.0
PrimateAI	Pathogenic	0.90	D
PROVEAN	Uncertain	-2.9	D
REVEL	Pathogenic	0.75
Sift	Benign	0.033	D
Sift4G	Benign	0.16	T
Polyphen		0.016	B
Vest4		0.73
MVP		0.75
MPC		0.17
ClinPred		0.92	D
GERP RS		6.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.60
gMVP		0.59
Mutation Taster		=13/87	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: rs1553495224; hg19: chr2-167159756;