10-18539563-C-T

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BS2

The NM_201596.3(CACNB2):c.1822C>T(p.Arg608Cys) variant causes a missense change. The variant allele was found at a frequency of 0.0000744 in 1,613,766 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R608L) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 30)

Exomes 𝑓: 0.000077 ( 0 hom. )

Consequence

CACNB2
NM_201596.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 7.19

Publications

3 publications found

Variant links:

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 Gene-Disease associations (from GenCC):

Brugada syndrome 4
Inheritance: AD, Unknown Classification: LIMITED, NO_KNOWN Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Ambry Genetics, Laboratory for Molecular Medicine
Brugada syndrome 1
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
hypertrophic cardiomyopathy
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
short QT syndrome
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

CACNB2 links:

ENSG00000240291 (HGNC:58168):

ENSG00000240291 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

BS2

High AC in GnomAd4 at 7 AD,Unknown gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CACNB2	NM_201596.3 link	c.1822C>T	p.Arg608Cys	missense_variant	Exon 14 of 14	ENST00000324631.13	NP_963890.2	Q08289-1
CACNB2	NM_201590.3 link	c.1660C>T	p.Arg554Cys	missense_variant	Exon 13 of 13	ENST00000377329.10	NP_963884.2	Q08289-3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CACNB2	ENST00000324631.13 link	c.1822C>T	p.Arg608Cys	missense_variant	Exon 14 of 14	1	NM_201596.3	ENSP00000320025.8		Q08289-1
CACNB2	ENST00000377329.10 link	c.1660C>T	p.Arg554Cys	missense_variant	Exon 13 of 13	1	NM_201590.3	ENSP00000366546.4		Q08289-3

Frequencies

GnomAD3 genomes

AF:

0.0000461

AC:

AN:

151796

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000484

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000195

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000199

AC:

AN:

251264

AF XY:

0.0000295

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000352

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000773

AC:

113

AN:

1461852

Hom.:

Cov.:

AF XY:

0.0000756

AC XY:

AN XY:

727222

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33478

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.000101

AC:

AN:

39694

South Asian (SAS)

AF:

0.00

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53414

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000908

AC:

101

AN:

1111994

Other (OTH)

AF:

0.000132

AC:

AN:

60390

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.472

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000461

AC:

AN:

151914

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74228

show subpopulations

African (AFR)

AF:

0.0000483

AC:

AN:

41416

American (AMR)

AF:

0.00

AC:

AN:

15262

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.000196

AC:

AN:

5110

South Asian (SAS)

AF:

0.00

AC:

AN:

4780

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10576

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000588

AC:

AN:

67984

Other (OTH)

AF:

0.00

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.454

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000508

Hom.:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Brugada syndrome 4

Uncertain:2

Aug 30, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 554 of the CACNB2 protein (p.Arg554Cys). This variant is present in population databases (no rsID available, gnomAD 0.005%). This variant has not been reported in the literature in individuals affected with CACNB2-related conditions. ClinVar contains an entry for this variant (Variation ID: 537367). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Nov 20, 2021

Fulgent Genetics, Fulgent Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Cardiovascular phenotype

Uncertain:1

Dec 19, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.R554C variant (also known as c.1660C>T), located in coding exon 13 of the CACNB2 gene, results from a C to T substitution at nucleotide position 1660. The arginine at codon 554 is replaced by cysteine, an amino acid with highly dissimilar properties. This amino acid position is well conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.18

BayesDel_addAF

Uncertain

0.13

BayesDel_noAF

Uncertain

0.060

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.41

T;.;T;.;.;.;T;T;.;.;.;T;.;.

Eigen

Uncertain

0.60

Eigen_PC

Uncertain

0.62

FATHMM_MKL

Uncertain

0.95

LIST_S2

Pathogenic

0.99

D;D;D;.;D;D;D;D;D;D;D;D;D;D

M_CAP

Uncertain

0.10

MetaRNN

Uncertain

0.56

D;D;D;D;D;D;D;D;D;D;D;D;D;D

MetaSVM

Uncertain

0.35

MutationAssessor

Uncertain

2.2

M;.;.;.;.;.;.;.;.;.;.;.;.;.

PhyloP100

7.2

PrimateAI

Benign

0.45

PROVEAN

Benign

-2.2

N;N;N;.;.;N;.;.;N;N;N;.;N;.

REVEL

Uncertain

0.41

Sift

Uncertain

0.0010

D;D;D;.;.;D;.;.;D;D;D;.;D;.

Sift4G

Uncertain

0.0020

D;D;D;.;.;D;D;D;D;D;D;D;D;.

Polyphen

1.0

D;D;D;.;.;D;.;.;.;D;D;.;.;.

Vest4

0.67

MVP

0.92

MPC

0.93

ClinPred

0.72

GERP RS

5.9

Varity_R

0.19

gMVP

0.26

Mutation Taster

=38/62

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over