19-35039883-G-A

Variant names:

• chr19-35039883-G-A
• NM_001037.5:c.*92G>A

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001037.5(SCN1B):​c.*92G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. The gene SCN1B is included in the ClinGen Criteria Specification Registry.

• Frequency: Genomes: not found (cov: 33)
• Consequence: SCN1B NM_001037.5 3_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.37
• Publications: 0 publications found

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]

HPN-AS1 (HGNC:47041): (HPN antisense RNA 1)

ACMG classification

Specifications for SCN1B are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.76).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001037.5. 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
	SCN1B	NM_001037.5	MANE Select	c.*92G>A		3_prime_UTR	Exon 6 of 6	NP_001028.1	Q07699-1
	SCN1B	NM_001321605.2		c.*92G>A		3_prime_UTR	Exon 6 of 6	NP_001308534.1	A0A1W2PR05

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SCN1B	ENST00000262631.11	TSL:1 MANE Select	c.*92G>A		3_prime_UTR	Exon 6 of 6	ENSP00000262631.3	Q07699-1
	SCN1B	ENST00000638536.1	TSL:1	c.*182G>A		3_prime_UTR	Exon 5 of 5	ENSP00000492022.1	Q07699-1
	SCN1B	ENST00000675741.1		c.*92G>A		3_prime_UTR	Exon 6 of 6	ENSP00000502395.1	A0A6Q8PGS1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 6

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.76
CADD	Benign	12
DANN	Benign	0.81
PhyloP100		3.4

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr19-35530787;