CACNB2 p.Phe142Leu

Variant names:

• chr10-18498447-C-A
• rs564275776
• NM_201596.3:c.426C>A
• CACNB2 p.Phe142Leu

Your query was ambiguous. Multiple possible variants found:

• chr10-18498447-C-A
• chr10-18498447-C-G
• chr10-18498445-T-C
• chr10-18498445-TTC-CTT
• chr10-18498445-TTC-CTA
• chr10-18498445-TTC-CTG

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_201596.3(CACNB2):​c.426C>A​(p.Phe142Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,740 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar. Synonymous variant affecting the same amino acid position (i.e. F142F) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: CACNB2 NM_201596.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.01
• Publications: 0 publications found

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: Unknown, AD Classification: LIMITED, NO_KNOWN Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, Ambry Genetics
• cardiogenetic disease

  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

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.777

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_201596.3. 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
	CACNB2	NM_201596.3	MANE Select	c.426C>A	p.Phe142Leu	missense	Exon 4 of 14	NP_963890.2	Q08289-1
	CACNB2	NM_201590.3	MANE Plus Clinical	c.264C>A	p.Phe88Leu	missense	Exon 3 of 13	NP_963884.2	Q08289-3
	CACNB2	NM_201597.3		c.426C>A	p.Phe142Leu	missense	Exon 4 of 14	NP_963891.1	Q08289-8

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CACNB2	ENST00000324631.13	TSL:1 MANE Select	c.426C>A	p.Phe142Leu	missense	Exon 4 of 14	ENSP00000320025.8	Q08289-1
	CACNB2	ENST00000377329.10	TSL:1 MANE Plus Clinical	c.264C>A	p.Phe88Leu	missense	Exon 3 of 13	ENSP00000366546.4	Q08289-3
	CACNB2	ENST00000352115.10	TSL:1	c.426C>A	p.Phe142Leu	missense	Exon 4 of 14	ENSP00000344474.6	Q08289-8

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251318 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461740 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727194

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.0000224 AC: 1 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86244

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53418

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111888

Other (OTH) AF: 0.00 AC: 0 AN: 60390

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000203476), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.34	D
BayesDel_noAF	Pathogenic	0.33
CADD	Benign	16
DANN	Benign	0.95
DEOGEN2	Pathogenic	0.85	D
Eigen	Benign	-0.65
Eigen_PC	Benign	-0.93
FATHMM_MKL	Benign	0.19	N
LIST_S2	Pathogenic	1.0	D
M_CAP	Uncertain	0.20	D
MetaRNN	Pathogenic	0.78	D
MetaSVM	Uncertain	0.73	D
MutationAssessor	Pathogenic	3.2	M
PhyloP100		-1.0
PrimateAI	Pathogenic	0.91	D
PROVEAN	Pathogenic	-5.8	D
REVEL	Pathogenic	0.67
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Varity_R		0.84
gMVP		0.80
Mutation Taster		=20/80	disease causing

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

dbSNP: rs564275776; hg19: chr10-18787376;