NM_006922.4:c.1595T>A

Variant names:

• chr2-165146815-A-T
• rs551260434
• NM_006922.4:c.1595T>A

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_006922.4(SCN3A):​c.1595T>A​(p.Val532Asp) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign 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. V532I) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 31)
• Consequence: SCN3A NM_006922.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.95
• 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 Submitted by: Illumina, ClinGen
• 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 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.38020006).

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SCN3A	NM_006922.4	MANE Select	c.1595T>A	p.Val532Asp	missense	Exon 12 of 28	NP_008853.3
	SCN3A	NM_001081676.2		c.1595T>A	p.Val532Asp	missense	Exon 12 of 28	NP_001075145.1
	SCN3A	NM_001081677.2		c.1595T>A	p.Val532Asp	missense	Exon 12 of 28	NP_001075146.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SCN3A	ENST00000283254.12	TSL:1 MANE Select	c.1595T>A	p.Val532Asp	missense	Exon 12 of 28	ENSP00000283254.7
	SCN3A	ENST00000409101.7	TSL:1	c.1595T>A	p.Val532Asp	missense	Exon 12 of 28	ENSP00000386726.3
	SCN3A	ENST00000706067.1		c.1595T>A	p.Val532Asp	missense	Exon 12 of 28	ENSP00000516211.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 31

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.24
BayesDel_addAF	Uncertain	0.092	D
BayesDel_noAF	Benign	-0.11
CADD	Benign	23
DANN	Benign	0.97
DEOGEN2	Uncertain	0.68	D
Eigen	Benign	0.064
Eigen_PC	Uncertain	0.23
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.97	D
M_CAP	Uncertain	0.094	D
MetaRNN	Benign	0.38	T
MetaSVM	Uncertain	0.31	D
MutationAssessor	Benign	0.69	N
PhyloP100		4.0
PrimateAI	Uncertain	0.58	T
PROVEAN	Uncertain	-3.5	D
REVEL	Uncertain	0.37
Sift	Benign	0.067	T
Sift4G	Benign	0.22	T
Polyphen		0.0070	B
Vest4		0.53
MutPred		0.37		Gain of solvent accessibility (P = 0.0097)
MVP		0.46
MPC		1.5
ClinPred		0.89	D
GERP RS		5.7
Varity_R		0.57
gMVP		0.70
Mutation Taster		=26/74	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: rs551260434; hg19: chr2-166003325;