dbSNP rs1554688978: GABBR2:p.Gln761Arg (chr9-98303371-T-C) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_005458.8(GABBR2):c.2282A>G(p.Gln761Arg) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. Q761Q) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 33)

Consequence

GABBR2
NM_005458.8 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.26

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

developmental and epileptic encephalopathy, 59
Inheritance: AD Classification: STRONG, MODERATE Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
neurodevelopmental disorder with poor language and loss of hand skills
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
atypical Rett syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

GABBR2 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.28855598).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005458.8. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GABBR2	NM_005458.8	MANE Select	c.2282A>G	p.Gln761Arg	missense	Exon 16 of 19	NP_005449.5

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
GABBR2	ENST00000259455.4	TSL:1 MANE Select	c.2282A>G	p.Gln761Arg	missense	Exon 16 of 19	ENSP00000259455.2
GABBR2	ENST00000634457.1	TSL:5	c.509A>G	p.Gln170Arg	missense	Exon 4 of 4	ENSP00000489352.1
GABBR2	ENST00000637410.1	TSL:5	n.2060A>G		non_coding_transcript_exon	Exon 16 of 19

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Cov.:

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Jul 11, 2017

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.085

BayesDel_addAF

Benign

-0.066

BayesDel_noAF

Benign

-0.33

CADD

Benign

(source)

DANN

Benign

0.46

DEOGEN2

Benign

0.045

Eigen

Benign

-0.29

Eigen_PC

Benign

-0.014

FATHMM_MKL

Uncertain

0.94

LIST_S2

Benign

0.80

M_CAP

Benign

0.030

MetaRNN

Benign

0.29

MetaSVM

Benign

-0.81

MutationAssessor

Benign

0.55

PhyloP100

6.3

PrimateAI

Uncertain

0.69

PROVEAN

Benign

1.8

REVEL

Uncertain

0.30

Sift

Benign

1.0

Sift4G

Benign

1.0

Polyphen

0.0

Vest4

0.20

MutPred

0.46

Gain of MoRF binding (P = 0.0097)

MVP

0.73

MPC

0.99

ClinPred

0.93

GERP RS

5.7

Varity_R

0.22

gMVP

0.33

Mutation Taster

=73/27

polymorphism

(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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over