10-18539301-T-C

Position:

• chr10-18539301-T-C

Variant summary

Our verdict is Benign. Variant got -17 ACMG points: 0P and 17B. BP4_Strong BP6_Very_Strong BP7 BS2

The NM_201596.3(CACNB2):​c.1560T>C​(p.Pro520=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00178 in 1,613,808 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.00095 (0 hom., cov: 30)
  • Exomes 𝑓: 0.0019 (4 hom.)
• Consequence: CACNB2 NM_201596.3 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:8
• Conservation: PhyloP100: 0.146

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]

(HGNC:):

ACMG classification

Verdict is Benign. Variant got -17 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.62).
• BP6: Variant 10-18539301-T-C is Benign according to our data. Variant chr10-18539301-T-C is described in ClinVar as [Likely_benign]. Clinvar id is 136647.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr10-18539301-T-C is described in Lovd as [Benign].
• BP7: Synonymous conserved (PhyloP=0.146 with no splicing effect.
• BS2: High AC in GnomAd4 at 145 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CACNB2	NM_201596.3	c.1560T>C	p.Pro520=	synonymous_variant	14/14	ENST00000324631.13	NP_963890.2
CACNB2	NM_201590.3	c.1398T>C	p.Pro466=	synonymous_variant	13/13	ENST00000377329.10	NP_963884.2
LOC124902386	XR_007062076.1			upstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CACNB2	ENST00000324631.13	c.1560T>C	p.Pro520=	synonymous_variant	14/14	1	NM_201596.3	ENSP00000320025
CACNB2	ENST00000377329.10	c.1398T>C	p.Pro466=	synonymous_variant	13/13	1	NM_201590.3	ENSP00000366546
	ENST00000425669.1	n.377-2A>G		splice_acceptor_variant, non_coding_transcript_variant		1

Frequencies

GnomAD3 genomes AF: 0.000955 AC: 145 AN: 151842 Hom.: 0 Cov.: 30

Gnomad AFR AF: 0.000436

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.000189

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00180

Gnomad OTH AF: 0.000480

GnomAD3 exomes AF: 0.000863 AC: 217 AN: 251404 Hom.: 0 AF XY: 0.000773 AC XY: 105 AN XY: 135874

Gnomad AFR exome AF: 0.000492

Gnomad AMR exome AF: 0.0000867

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.000139

Gnomad NFE exome AF: 0.00172

Gnomad OTH exome AF: 0.00114

GnomAD4 exome AF: 0.00187 AC: 2730 AN: 1461848 Hom.: 4 Cov.: 31 AF XY: 0.00177 AC XY: 1287 AN XY: 727222

Gnomad4 AFR exome AF: 0.000269

Gnomad4 AMR exome AF: 0.0000671

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.000187

Gnomad4 NFE exome AF: 0.00237

Gnomad4 OTH exome AF: 0.00108

GnomAD4 genome AF: 0.000954 AC: 145 AN: 151960 Hom.: 0 Cov.: 30 AF XY: 0.000808 AC XY: 60 AN XY: 74276

Gnomad4 AFR AF: 0.000434

Gnomad4 AMR AF: 0.000131

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.000189

Gnomad4 NFE AF: 0.00180

Gnomad4 OTH AF: 0.000475

Alfa AF: 0.00151 Hom.: 0

Bravo AF: 0.00105

EpiCase AF: 0.00185

EpiControl AF: 0.00190

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:8

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Brugada syndrome 4 Benign:3

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 30, 2024	- -
Benign, criteria provided, single submitter	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	Mar 31, 2017	- -
Likely benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Jun 25, 2020	- -

not specified Benign:2

Benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 29, 2014	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -

not provided Benign:2

Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jan 01, 2023	CACNB2: BP4, BP7, BS1 -
Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

Cardiovascular phenotype Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 23, 2015

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.62
CADD	Benign	8.4
DANN	Benign	0.50

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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

Other links and lift over

dbSNP: rs150280879; hg19: chr10-18828230;