Variant rs770747359 details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS2

The NM_014191.4(SCN8A):c.3373-9C>T variant causes a splice polypyrimidine tract, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000607 in 1,565,760 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000055 ( 0 hom. )

Consequence

SCN8A
NM_014191.4 splice_polypyrimidine_tract, intron

Scores

Splicing: ADA: 0.00003172

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: -0.612

Variant links:

Genes affected

SCN8A (HGNC:10596): (sodium voltage-gated channel alpha subunit 8) This gene encodes a member of the sodium channel alpha subunit gene family. The encoded protein forms the ion pore region of the voltage-gated sodium channel. This protein is essential for the rapid membrane depolarization that occurs during the formation of the action potential in excitable neurons. Mutations in this gene are associated with cognitive disability, pancerebellar atrophy and ataxia. Alternate splicing results in multiple transcript variants.[provided by RefSeq, May 2010]

SCN8A links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -16 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.81).

BP6

Variant 12-51769859-C-T is Benign according to our data. Variant chr12-51769859-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 530519.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr12-51769859-C-T is described in Lovd as [Likely_benign].

BS2

High AC in GnomAd4 at 17 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	MANE
SCN8A	NM_001330260.2 linkuse as main transcript	c.3373-9C>T	splice_polypyrimidine_tract_variant, intron_variant	ENST00000627620.5
SCN8A	NM_014191.4 linkuse as main transcript	c.3373-9C>T	splice_polypyrimidine_tract_variant, intron_variant	ENST00000354534.11
SCN8A	NM_001177984.3 linkuse as main transcript	c.3373-9C>T	splice_polypyrimidine_tract_variant, intron_variant
SCN8A	NM_001369788.1 linkuse as main transcript	c.3373-9C>T	splice_polypyrimidine_tract_variant, intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SCN8A	ENST00000354534.11 linkuse as main transcript	c.3373-9C>T		splice_polypyrimidine_tract_variant, intron_variant		1	NM_014191.4	P4	Q9UQD0-1
SCN8A	ENST00000627620.5 linkuse as main transcript	c.3373-9C>T		splice_polypyrimidine_tract_variant, intron_variant		5	NM_001330260.2	A1	Q9UQD0-2

Frequencies

GnomAD3 genomes

AF:

0.000112

AC:

AN:

152102

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000193

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.000118

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000444

AC:

AN:

202830

Hom.:

AF XY:

0.0000463

AC XY:

AN XY:

108044

show subpopulations

Gnomad AFR exome

AF:

0.0000844

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000687

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000788

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000552

AC:

AN:

1413658

Hom.:

Cov.:

AF XY:

0.0000599

AC XY:

AN XY:

700894

show subpopulations

Gnomad4 AFR exome

AF:

0.000246

Gnomad4 AMR exome

AF:

0.0000757

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000261

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000592

Gnomad4 OTH exome

AF:

0.0000340

GnomAD4 genome

AF:

0.000112

AC:

AN:

152102

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

74294

show subpopulations

Gnomad4 AFR

AF:

0.000193

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000118

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000102

Hom.:

Bravo

AF:

0.0000982

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Early infantile epileptic encephalopathy with suppression bursts

Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Jul 25, 2023

- -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Jan 16, 2020

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.81

CADD

Benign

1.4

DANN

Benign

0.43

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.000032

dbscSNV1_RF

Benign

0.0020

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over