3-38921226-G-T

Variant names:

• chr3-38921226-G-T
• rs764550088
• NM_001349253.2:c.742C>A

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001349253.2(SCN11A):​c.742C>A​(p.Arg248Ser) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,718 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R248H) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: SCN11A NM_001349253.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.63
• Publications: 0 publications found

Genes affected

SCN11A (HGNC:10583): (sodium voltage-gated channel alpha subunit 11) Voltage-gated sodium channels are transmembrane glycoprotein complexes composed of a large alpha subunit with 24 transmembrane domains and one or more regulatory beta subunits. They are responsible for the generation and propagation of action potentials in neurons and muscle. This gene encodes one member of the sodium channel alpha subunit gene family, and is highly expressed in nociceptive neurons of dorsal root ganglia and trigeminal ganglia. It mediates brain-derived neurotrophic factor-evoked membrane depolarization and is a major effector of peripheral inflammatory pain hypersensitivity. Mutations in this gene have been associated with hereditary sensory and autonomic neuropathy type VII and familial episodic pain syndrome-3. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Mar 2017]

SCN11A Gene-Disease associations (from GenCC):

• autosomal dominant hereditary sensory and autonomic neuropathy

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• familial episodic pain syndrome with predominantly lower limb involvement

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Labcorp Genetics (formerly Invitae)
• hereditary sensory and autonomic neuropathy type 7

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, PanelApp Australia, G2P, Labcorp Genetics (formerly Invitae)
• sodium channelopathy-related small fiber neuropathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001349253.2. 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
	SCN11A	NM_001349253.2	MANE Select	c.742C>A	p.Arg248Ser	missense	Exon 10 of 30	NP_001336182.1	Q9UI33-1
	SCN11A	NM_014139.3		c.742C>A	p.Arg248Ser	missense	Exon 6 of 26	NP_054858.2	Q9UI33-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SCN11A	ENST00000302328.9	TSL:5 MANE Select	c.742C>A	p.Arg248Ser	missense	Exon 10 of 30	ENSP00000307599.3	Q9UI33-1
	SCN11A	ENST00000668754.1		c.742C>A	p.Arg248Ser	missense	Exon 13 of 33	ENSP00000499569.1	Q9UI33-1
	SCN11A	ENST00000456224.7	TSL:5	c.742C>A	p.Arg248Ser	missense	Exon 6 of 25	ENSP00000416757.3	Q9UI33-3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461718 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727158

African (AFR) AF: 0.00 AC: 0 AN: 33470

American (AMR) AF: 0.00 AC: 0 AN: 44712

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26130

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86250

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5762

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111896

Other (OTH) AF: 0.0000166 AC: 1 AN: 60384

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.34
BayesDel_addAF	Pathogenic	0.18	D
BayesDel_noAF	Uncertain	0.030
CADD	Uncertain	23
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.60	D
Eigen	Uncertain	0.48
Eigen_PC	Uncertain	0.52
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.95	D
M_CAP	Pathogenic	0.37	D
MetaRNN	Uncertain	0.62	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Benign	1.6	L
PhyloP100		6.6
PrimateAI	Benign	0.33	T
PROVEAN	Uncertain	-2.5	N
REVEL	Pathogenic	0.67
Sift	Uncertain	0.020	D
Sift4G	Uncertain	0.010	D
Polyphen		0.91	P
Vest4		0.45
MutPred		0.65		Loss of MoRF binding (P = 0.0114)
MVP		0.99
MPC		0.51
ClinPred		0.99	D
GERP RS		4.7
Varity_R		0.55
gMVP		0.71
Mutation Taster		=28/72	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs764550088; hg19: chr3-38962717;