chr19-35030726-C-T

Position:

chr19-35030726-C-T

Variant summary

Our verdict is Benign. Variant got -18 ACMG points: 0P and 18B. BP4_ModerateBP6_Very_StrongBS1BS2

The NM_001037.5(SCN1B):c.-95C>T variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00222 in 395,560 control chromosomes in the GnomAD database, including 7 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0054 ( 7 hom., cov: 31)

Exomes 𝑓: 0.00032 ( 0 hom. )

Consequence

SCN1B
NM_001037.5 5_prime_UTR

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: -0.0560

Variant links:

Genes affected

SCN1B (HGNC:10586): (sodium voltage-gated channel beta subunit 1) Voltage-gated sodium channels are heteromeric proteins that function in the generation and propagation of action potentials in muscle and neuronal cells. They are composed of one alpha and two beta subunits, where the alpha subunit provides channel activity and the beta-1 subunit modulates the kinetics of channel inactivation. This gene encodes a sodium channel beta-1 subunit. Mutations in this gene result in generalized epilepsy with febrile seizures plus, Brugada syndrome 5, and defects in cardiac conduction. Multiple transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Oct 2009]

SCN1B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -18 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.33).

BP6

Variant 19-35030726-C-T is Benign according to our data. Variant chr19-35030726-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 328830.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00538 (800/148648) while in subpopulation AFR AF= 0.0186 (766/41146). AF 95% confidence interval is 0.0175. There are 7 homozygotes in gnomad4. There are 369 alleles in male gnomad4 subpopulation. Median coverage is 31. This position pass quality control queck.

BS2

High AC in GnomAd4 at 800 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SCN1B	NM_001037.5 linkuse as main transcript	c.-95C>T		5_prime_UTR_variant	1/6	ENST00000262631.11
SCN1B	NM_199037.5 linkuse as main transcript	c.-95C>T		5_prime_UTR_variant	1/3

Ensembl

Gene	Transcript	HGVSc	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SCN1B	ENST00000262631.11 linkuse as main transcript	c.-95C>T	5_prime_UTR_variant	1/6	1	NM_001037.5	P1	Q07699-1
SCN1B	ENST00000415950.5 linkuse as main transcript	c.-95C>T	5_prime_UTR_variant	1/3	1			Q07699-2
SCN1B	ENST00000638536.1 linkuse as main transcript	c.-95C>T	5_prime_UTR_variant	1/5	1		P1	Q07699-1
SCN1B	ENST00000595652.5 linkuse as main transcript		upstream_gene_variant		2

Frequencies

GnomAD3 genomes

AF:

0.00539

AC:

800

AN:

148540

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0186

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00153

Gnomad ASJ

AF:

0.00147

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:

0.00341

GnomAD4 exome

AF:

0.000316

AC:

AN:

246912

Hom.:

Cov.:

AF XY:

0.000230

AC XY:

AN XY:

143746

show subpopulations

Gnomad4 AFR exome

AF:

0.0127

Gnomad4 AMR exome

AF:

0.000413

Gnomad4 ASJ exome

AF:

0.000753

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000270

Gnomad4 OTH exome

AF:

0.000621

GnomAD4 genome

AF:

0.00538

AC:

800

AN:

148648

Hom.:

Cov.:

AF XY:

0.00509

AC XY:

369

AN XY:

72454

show subpopulations

Gnomad4 AFR

AF:

0.0186

Gnomad4 AMR

AF:

0.00146

Gnomad4 ASJ

AF:

0.00147

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00338

Alfa

AF:

0.00381

Hom.:

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Brugada syndrome 5

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

not provided

Benign:1

Likely benign, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

- -

Generalized epilepsy with febrile seizures plus, type 1

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.33

CADD

Benign

DANN

Uncertain

0.99

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

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