9-137877995-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_000718.4(CACNA1B):​c.62C>T​(p.Ala21Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000269 in 148,722 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000027 ( 0 hom., cov: 34)
Exomes 𝑓: 9.6e-7 ( 0 hom. )
Failed GnomAD Quality Control

Consequence

CACNA1B
NM_000718.4 missense

Scores

2
4
13

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.75
Variant links:
Genes affected
CACNA1B (HGNC:1389): (calcium voltage-gated channel subunit alpha1 B) The protein encoded by this gene is the pore-forming subunit of an N-type voltage-dependent calcium channel, which controls neurotransmitter release from neurons. The encoded protein forms a complex with alpha-2, beta, and delta subunits to form the high-voltage activated channel. This channel is sensitive to omega-conotoxin-GVIA and omega-agatoxin-IIIA but insensitive to dihydropyridines. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2011]

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (MetaRNN=0.29262748).

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
CACNA1BNM_000718.4 linkc.62C>T p.Ala21Val missense_variant Exon 1 of 47 ENST00000371372.6 NP_000709.1 Q00975-1
CACNA1BNM_001243812.2 linkc.62C>T p.Ala21Val missense_variant Exon 1 of 47 NP_001230741.1 Q00975-2
LOC100133077NR_121583.1 linkn.2692-2315G>A intron_variant Intron 2 of 3

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
CACNA1BENST00000371372.6 linkc.62C>T p.Ala21Val missense_variant Exon 1 of 47 5 NM_000718.4 ENSP00000360423.1 Q00975-1
CACNA1BENST00000371357.5 linkc.62C>T p.Ala21Val missense_variant Exon 1 of 46 5 ENSP00000360408.1 B1AQK7
CACNA1BENST00000371363.5 linkc.62C>T p.Ala21Val missense_variant Exon 1 of 46 5 ENSP00000360414.1 B1AQK6
CACNA1BENST00000277551.6 linkc.62C>T p.Ala21Val missense_variant Exon 1 of 47 5 ENSP00000277551.2 Q00975-2

Frequencies

GnomAD3 genomes
AF:
0.0000269
AC:
4
AN:
148722
Hom.:
0
Cov.:
34
show subpopulations
Gnomad AFR
AF:
0.0000980
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
Data not reliable, filtered out with message: AS_VQSR
AF:
9.65e-7
AC:
1
AN:
1036774
Hom.:
0
Cov.:
32
AF XY:
0.00
AC XY:
0
AN XY:
492710
show subpopulations
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:
0.00
Gnomad4 FIN exome
AF:
0.00
Gnomad4 NFE exome
AF:
0.00000112
Gnomad4 OTH exome
AF:
0.00
GnomAD4 genome
AF:
0.0000269
AC:
4
AN:
148722
Hom.:
0
Cov.:
34
AF XY:
0.0000276
AC XY:
2
AN XY:
72552
show subpopulations
Gnomad4 AFR
AF:
0.0000980
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

Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link

Submissions by phenotype

not provided Uncertain:1
Aug 13, 2024
GeneDx
Significance: Uncertain significance
Review Status: criteria provided, single submitter
Collection Method: clinical testing

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis indicates that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
0.13
BayesDel_addAF
Uncertain
0.077
D
BayesDel_noAF
Benign
-0.13
CADD
Uncertain
24
DANN
Uncertain
1.0
DEOGEN2
Benign
0.20
.;.;T;T;.;T
Eigen
Benign
-0.39
Eigen_PC
Benign
-0.30
FATHMM_MKL
Uncertain
0.79
D
LIST_S2
Benign
0.60
T;T;T;T;T;T
M_CAP
Pathogenic
0.93
D
MetaRNN
Benign
0.29
T;T;T;T;T;T
MetaSVM
Uncertain
0.37
D
MutationAssessor
Benign
0.69
N;.;N;.;.;.
PrimateAI
Pathogenic
0.94
D
PROVEAN
Benign
-1.2
N;.;N;N;N;N
REVEL
Benign
0.26
Sift
Benign
0.28
T;.;T;T;T;T
Sift4G
Benign
0.27
T;T;T;T;T;T
Polyphen
0.19
.;.;.;B;.;.
Vest4
0.26
MutPred
0.37
Gain of sheet (P = 0.0266);Gain of sheet (P = 0.0266);Gain of sheet (P = 0.0266);Gain of sheet (P = 0.0266);Gain of sheet (P = 0.0266);Gain of sheet (P = 0.0266);
MVP
0.76
MPC
1.1
ClinPred
0.60
D
GERP RS
2.8
Varity_R
0.17
gMVP
0.27

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs1401703291; hg19: chr9-140772447; API