rs750396182

Positions:

• chr10-18150881-A-G
• chr10-18150881-A-T

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PVS1_Moderate BP6 BS2

The NM_201596.3(CACNB2):​c.121-2A>G variant causes a splice acceptor, intron change. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in Lovd as Benign (no stars).

• Frequency:
  • Genomes: 𝑓 0.000067 (0 hom., cov: 0)
  • Exomes 𝑓: 0.000021 (0 hom.)
• Consequence: CACNB2 NM_201596.3 splice_acceptor, intron
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.59

Genes affected

CACNB2 (HGNC:1402): (calcium voltage-gated channel auxiliary subunit beta 2) This gene encodes a subunit of a voltage-dependent calcium channel protein that is a member of the voltage-gated calcium channel superfamily. The gene product was originally identified as an antigen target in Lambert-Eaton myasthenic syndrome, an autoimmune disorder. Mutations in this gene are associated with Brugada syndrome. Alternatively spliced variants encoding different isoforms have been described. [provided by RefSeq, Feb 2013]

CACNB2 (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -3 ACMG points.

• PVS1: Splicing +-2 bp (donor or acceptor) variant, product NOT destroyed by NMD, known LOF gene, truncates exone, which is 0.046394352 fraction of the gene. No cryptic splice site detected. Exon removal is inframe change.
• BP6: Variant 10-18150881-A-G is Benign according to our data. Variant chr10-18150881-A-G is described in Lovd as [Benign].
• BS2: High AC in GnomAdExome4 at 6 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CACNB2	NM_201596.3	c.121-2A>G		splice_acceptor_variant, intron_variant		ENST00000324631.13	NP_963890.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CACNB2	ENST00000324631.13	c.121-2A>G		splice_acceptor_variant, intron_variant		1	NM_201596.3	ENSP00000320025.8

Frequencies

GnomAD3 genomes AF: 0.0000674 AC: 1 AN: 14830 Hom.: 0 Cov.: 0

Gnomad AFR AF: 0.000263

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.0000213 AC: 6 AN: 282156 Hom.: 0 Cov.: 6 AF XY: 0.0000136 AC XY: 2 AN XY: 147544

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000100

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000250

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0000674 AC: 1 AN: 14830 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 7434

Gnomad4 AFR AF: 0.000263

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.35	D
BayesDel_noAF	Pathogenic	0.27
CADD	Pathogenic	35
DANN	Uncertain	0.99
Eigen	Pathogenic	1.0
Eigen_PC	Pathogenic	0.87
FATHMM_MKL	Uncertain	0.96	D
GERP RS		5.7

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.93
SpliceAI score (max)		1.0		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.97		Position offset: 15
DS_AL_spliceai		1.0		Position offset: 2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs750396182; hg19: chr10-18439810;