rs1399602856

Variant names:

• chr2-165176243-G-A
• rs1399602856
• NM_006922.4:c.152C>T

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_006922.4(SCN3A):​c.152C>T​(p.Pro51Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000124 in 1,613,336 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 (★★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: SCN3A NM_006922.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 10.0
• Publications: 0 publications found

Genes affected

SCN3A (HGNC:10590): (sodium voltage-gated channel alpha subunit 3) 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 found in a cluster of five alpha subunit genes on chromosome 2. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

SCN3A Gene-Disease associations (from GenCC):

• genetic developmental and epileptic encephalopathy

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Illumina, ClinGen, PanelApp Australia
• developmental and epileptic encephalopathy, 62

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• epilepsy, familial focal, with variable foci 4

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• undetermined early-onset epileptic encephalopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000236283 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.856

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006922.4. 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
	SCN3A	NM_006922.4	MANE Select	c.152C>T	p.Pro51Leu	missense	Exon 3 of 28	NP_008853.3
	SCN3A	NM_001081676.2		c.152C>T	p.Pro51Leu	missense	Exon 3 of 28	NP_001075145.1	Q9NY46-4
	SCN3A	NM_001081677.2		c.152C>T	p.Pro51Leu	missense	Exon 3 of 28	NP_001075146.1	Q9NY46-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SCN3A	ENST00000283254.12	TSL:1 MANE Select	c.152C>T	p.Pro51Leu	missense	Exon 3 of 28	ENSP00000283254.7	Q9NY46-3
	SCN3A	ENST00000409101.7	TSL:1	c.152C>T	p.Pro51Leu	missense	Exon 3 of 28	ENSP00000386726.3	Q9NY46-2
	SCN3A	ENST00000706067.1		c.152C>T	p.Pro51Leu	missense	Exon 3 of 28	ENSP00000516211.1	A0A994J5P2

Frequencies

GnomAD3 genomes AF: 0.00000660 AC: 1 AN: 151476 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000242

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461860 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727230

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

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

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111984

Other (OTH) AF: 0.00 AC: 0 AN: 60394

GnomAD4 genome AF: 0.00000660 AC: 1 AN: 151476 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 73952

African (AFR) AF: 0.0000242 AC: 1 AN: 41306

American (AMR) AF: 0.00 AC: 0 AN: 15224

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3454

East Asian (EAS) AF: 0.00 AC: 0 AN: 5188

South Asian (SAS) AF: 0.00 AC: 0 AN: 4778

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10394

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 314

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 67832

Other (OTH) AF: 0.00 AC: 0 AN: 2080

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	2	-	not provided (2)
-	1	-	Inborn genetic diseases (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.74
BayesDel_addAF	Pathogenic	0.32	D
BayesDel_noAF	Pathogenic	0.22
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.86	D
Eigen	Pathogenic	1.0
Eigen_PC	Pathogenic	0.94
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.54	D
MetaRNN	Pathogenic	0.86	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	4.0	H
PhyloP100		10
PrimateAI	Uncertain	0.70	T
PROVEAN	Pathogenic	-8.9	D
REVEL	Uncertain	0.64
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.84
MutPred		0.25		Loss of helix (P = 0.0558)
MVP		0.97
MPC		1.3
ClinPred		1.0	D
GERP RS		5.3
Varity_R		0.80
gMVP		0.69
Mutation Taster		=59/41	polymorphism

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: rs1399602856; hg19: chr2-166032753;