NM_001365536.1:c.4415T>A

Variant names:

• chr2-166204448-A-T
• rs121908914
• NM_001365536.1:c.4415T>A

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PM1 PM2 PM5 PP3_Moderate PP5_Moderate

The NM_001365536.1(SCN9A):​c.4415T>A​(p.Ile1472Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 13/22 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I1472T) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SCN9A NM_001365536.1 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 9.19
• Publications: 20 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: Pathogenic. The variant received 10 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 5 uncertain in NM_001365536.1
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr2-166204448-A-G is described in ClinVar as Pathogenic. ClinVar VariationId is 6360.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.903
• PP5: Variant 2-166204448-A-T is Pathogenic according to our data. Variant chr2-166204448-A-T is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 446178.Status of the report is criteria_provided_single_submitter, 1 stars.

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.4415T>A	p.Ile1472Asn	missense	Exon 25 of 27	NP_001352465.1	Q15858-1
	SCN9A	NM_002977.4		c.4382T>A	p.Ile1461Asn	missense	Exon 25 of 27	NP_002968.2	Q15858-3
	SCN1A-AS1	NR_110260.1		n.611+4630A>T		intron	N/A

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SCN9A	ENST00000642356.2	MANE Select	c.4415T>A	p.Ile1472Asn	missense	Exon 25 of 27	ENSP00000495601.1	Q15858-1
	SCN9A	ENST00000303354.11	TSL:5	c.4415T>A	p.Ile1472Asn	missense	Exon 25 of 27	ENSP00000304748.7	Q15858-1
	SCN9A	ENST00000409672.5	TSL:5	c.4382T>A	p.Ile1461Asn	missense	Exon 25 of 27	ENSP00000386306.1	Q15858-3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Likely pathogenic

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)
1	-	-	Paroxysmal extreme pain disorder (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.94
BayesDel_addAF	Pathogenic	0.49	D
BayesDel_noAF	Pathogenic	0.47
CADD	Pathogenic	27
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.64	D
Eigen	Pathogenic	0.80
Eigen_PC	Pathogenic	0.69
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.63	D
MetaRNN	Pathogenic	0.90	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	4.3	H
PhyloP100		9.2
PrimateAI	Pathogenic	0.87	D
PROVEAN	Pathogenic	-6.5	D
REVEL	Pathogenic	0.96
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Vest4		0.97
MutPred		0.55		Gain of disorder (P = 0.0134)
MVP		0.95
MPC		0.63
ClinPred		1.0	D
GERP RS		4.3
Varity_R		0.92
gMVP		0.87
Mutation Taster		=0/100	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs121908914; hg19: chr2-167060958;