Genetic Variant CACNA1B:p.Gly35Glu (chr9-137878037-G-A) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

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

The NM_000718.4(CACNA1B):c.104G>A(p.Gly35Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 34)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

CACNA1B
NM_000718.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.82

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]

CACNA1B links:

ENSG00000203987 (HGNC:58213):

ENSG00000203987 links:

LOC100133077 (HGNC:):

LOC100133077 links:

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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=0.3511219).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CACNA1B	NM_000718.4 link	c.104G>A	p.Gly35Glu	missense_variant	Exon 1 of 47	ENST00000371372.6	NP_000709.1	Q00975-1
CACNA1B	NM_001243812.2 link	c.104G>A	p.Gly35Glu	missense_variant	Exon 1 of 47		NP_001230741.1	Q00975-2
LOC100133077	NR_121583.1 link	n.2692-2357C>T		intron_variant	Intron 2 of 3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CACNA1B	ENST00000371372.6 link	c.104G>A	p.Gly35Glu	missense_variant	Exon 1 of 47	5	NM_000718.4	ENSP00000360423.1	Q00975-1
CACNA1B	ENST00000371357.5 link	c.104G>A	p.Gly35Glu	missense_variant	Exon 1 of 46	5		ENSP00000360408.1	B1AQK7
CACNA1B	ENST00000371363.5 link	c.104G>A	p.Gly35Glu	missense_variant	Exon 1 of 46	5		ENSP00000360414.1	B1AQK6
CACNA1B	ENST00000277551.6 link	c.104G>A	p.Gly35Glu	missense_variant	Exon 1 of 47	5		ENSP00000277551.2	Q00975-2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0;AS_VQSR

AF:

0.00

AC:

AN:

1133502

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

547520

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 04, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.104G>A (p.G35E) alteration is located in exon 1 (coding exon 1) of the CACNA1B gene. This alteration results from a G to A substitution at nucleotide position 104, causing the glycine (G) at amino acid position 35 to be replaced by a glutamic acid (E). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.49

BayesDel_addAF

Uncertain

0.16

BayesDel_noAF

Uncertain

-0.010

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.30

.;.;T;T;.;T

Eigen

Benign

-0.31

Eigen_PC

Benign

-0.28

FATHMM_MKL

Uncertain

0.81

LIST_S2

Benign

0.73

T;T;T;T;T;T

M_CAP

Pathogenic

0.85

MetaRNN

Benign

0.35

T;T;T;T;T;T

MetaSVM

Uncertain

0.37

MutationAssessor

Uncertain

2.8

M;.;M;.;.;.

PrimateAI

Pathogenic

0.91

PROVEAN

Benign

-1.7

N;.;N;N;N;N

REVEL

Uncertain

0.39

Sift

Uncertain

0.0050

D;.;D;D;D;D

Sift4G

Benign

0.30

T;T;T;T;T;T

Polyphen

0.057

.;.;.;B;.;.

Vest4

0.43

MutPred

0.29

Gain of solvent accessibility (P = 0.012);Gain of solvent accessibility (P = 0.012);Gain of solvent accessibility (P = 0.012);Gain of solvent accessibility (P = 0.012);Gain of solvent accessibility (P = 0.012);Gain of solvent accessibility (P = 0.012);

MVP

0.65

MPC

1.2

ClinPred

0.82

GERP RS

2.6

Varity_R

0.18

gMVP

0.44

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.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over