dbSNP rs764365066: GABBR2:p.Val134Phe (chr9-98577994-C-A) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3

The NM_005458.8(GABBR2):c.400G>T(p.Val134Phe) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,634 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.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

GABBR2
NM_005458.8 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 7.86

Variant links:

Genes affected

GABBR2 (HGNC:4507): (gamma-aminobutyric acid type B receptor subunit 2) The multi-pass membrane protein encoded by this gene belongs to the G-protein coupled receptor 3 family and GABA-B receptor subfamily. The GABA-B receptors inhibit neuronal activity through G protein-coupled second-messenger systems, which regulate the release of neurotransmitters, and the activity of ion channels and adenylyl cyclase. This receptor subunit forms an active heterodimeric complex with GABA-B receptor subunit 1, neither of which is effective on its own. Allelic variants of this gene have been associated with nicotine dependence.[provided by RefSeq, Jan 2010]

GABBR2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.778

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GABBR2	NM_005458.8 link	c.400G>T	p.Val134Phe	missense_variant	Exon 2 of 19	ENST00000259455.4	NP_005449.5	O75899H9NIL8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
GABBR2	ENST00000259455.4 link	c.400G>T	p.Val134Phe	missense_variant	Exon 2 of 19	1	NM_005458.8	ENSP00000259455.2	O75899
GABBR2	ENST00000637717.1 link	c.16G>T	p.Val6Phe	missense_variant	Exon 2 of 3	5		ENSP00000490789.1	A0A1B0GW60
GABBR2	ENST00000634227.1 link	n.174G>T		non_coding_transcript_exon_variant	Exon 2 of 6	5
GABBR2	ENST00000637410.1 link	n.178G>T		non_coding_transcript_exon_variant	Exon 2 of 19	5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251398

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135874

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461634

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727142

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:

0.0000187

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.92

BayesDel_addAF

Pathogenic

0.34

BayesDel_noAF

Pathogenic

0.25

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.22

T;T

Eigen

Uncertain

0.64

Eigen_PC

Uncertain

0.62

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.90

D;D

M_CAP

Uncertain

0.26

MetaRNN

Pathogenic

0.78

D;D

MetaSVM

Uncertain

0.26

MutationAssessor

Benign

1.4

L;.

PrimateAI

Uncertain

0.74

PROVEAN

Benign

-2.2

N;.

REVEL

Pathogenic

0.77

Sift

Benign

0.038

D;.

Sift4G

Uncertain

0.022

D;.

Polyphen

1.0

D;.

Vest4

0.84

MutPred

0.58

Loss of helix (P = 0.1706);.;

MVP

0.93

MPC

3.1

ClinPred

0.91

GERP RS

4.6

Varity_R

0.50

gMVP

0.97

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

Computational scores

Splicing

Publications

LitVar

Other links and lift over