11-123653773-A-T

Variant names:

• chr11-123653773-A-T
• rs121918282
• NM_001040151.2:c.29T>A

Variant summary

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

The NM_001040151.2(SCN3B):​c.29T>A​(p.Leu10Gln) variant causes a missense 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. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L10P) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: SCN3B NM_001040151.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.766
• Publications: 0 publications found

Genes affected

SCN3B (HGNC:20665): (sodium voltage-gated channel beta subunit 3) Voltage-gated sodium channels are transmembrane glycoprotein complexes composed of a large alpha subunit 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 beta subunit gene family, and influences the inactivation kinetics of the sodium channel. Two alternatively spliced variants, encoding the same protein, have been identified. [provided by RefSeq, Jul 2008]

SCN3B Gene-Disease associations (from GenCC):

• familial atrial fibrillation

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Brugada syndrome 7

  Inheritance: AD, Unknown Classification: LIMITED Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
• Brugada syndrome 1

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

LOC105369543 (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=0.30737376).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001040151.2. 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
	SCN3B	NM_001040151.2	MANE Select	c.29T>A	p.Leu10Gln	missense	Exon 2 of 7	NP_001035241.1	Q9NY72
	SCN3B	NM_018400.4		c.29T>A	p.Leu10Gln	missense	Exon 1 of 6	NP_060870.1	Q9NY72

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SCN3B	ENST00000299333.8	TSL:1 MANE Select	c.29T>A	p.Leu10Gln	missense	Exon 2 of 7	ENSP00000299333.3	Q9NY72
	SCN3B	ENST00000392770.6	TSL:1	c.29T>A	p.Leu10Gln	missense	Exon 1 of 6	ENSP00000376523.2	Q9NY72
	SCN3B	ENST00000530277.5	TSL:1	c.29T>A	p.Leu10Gln	missense	Exon 2 of 6	ENSP00000432785.1	Q9NY72

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Pathogenic	0.26	D
BayesDel_noAF	Pathogenic	0.14
CADD	Benign	19
DANN	Benign	0.97
DEOGEN2	Benign	0.38	T
Eigen	Benign	-0.36
Eigen_PC	Benign	-0.21
FATHMM_MKL	Benign	0.084	N
LIST_S2	Benign	0.69	T
M_CAP	Uncertain	0.085	D
MetaRNN	Benign	0.31	T
MetaSVM	Uncertain	0.38	D
MutationAssessor	Benign	0.97	L
PhyloP100		0.77
PrimateAI	Benign	0.46	T
PROVEAN	Benign	-1.6	N
REVEL	Uncertain	0.59
Sift	Benign	0.073	T
Sift4G	Benign	0.29	T
Polyphen		0.0010	B
Vest4		0.77
MutPred		0.48		Gain of catalytic residue at L10 (P = 0.0365)
MVP		0.86
MPC		0.45
ClinPred		0.16	T
GERP RS		2.5
Varity_R		0.12
gMVP		0.74
Mutation Taster		=82/18	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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: rs121918282; hg19: chr11-123524481;