chr5-161294271-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -19 ACMG points: 1P and 20B. PP2BP4_StrongBP6_Very_StrongBS1BS2

The NM_001371727.1(GABRB2):c.1349G>A(p.Ser450Asn) variant causes a missense change. The variant allele was found at a frequency of 0.000901 in 1,614,032 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.00047 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00095 ( 1 hom. )

Consequence

GABRB2
NM_001371727.1 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: 3.93

Variant links:

Genes affected

GABRB2 (HGNC:4082): (gamma-aminobutyric acid type A receptor subunit beta2) The gamma-aminobutyric acid (GABA) A receptor is a multisubunit chloride channel that mediates the fastest inhibitory synaptic transmission in the central nervous system. This gene encodes GABA A receptor, beta 2 subunit. It is mapped to chromosome 5q34 in a cluster comprised of genes encoding alpha 1 and gamma 2 subunits of the GABA A receptor. Alternative splicing of this gene generates 2 transcript variants, differing by a 114 bp insertion. [provided by RefSeq, Jul 2008]

GABRB2 links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -19 ACMG points.

PP2

Missense variant in the GABRB2 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 45 curated pathogenic missense variants (we use a threshold of 10). The gene has 42 curated benign missense variants. Gene score misZ: 3.3968 (above the threshold of 3.09). Trascript score misZ: 4.0905 (above the threshold of 3.09). GenCC associations: The gene is linked to undetermined early-onset epileptic encephalopathy, epileptic encephalopathy, infantile or early childhood, 2.

BP4

Computational evidence support a benign effect (MetaRNN=0.028047472).

BP6

Variant 5-161294271-C-T is Benign according to our data. Variant chr5-161294271-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 383240.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000473 (72/152186) while in subpopulation NFE AF= 0.000882 (60/68034). AF 95% confidence interval is 0.000703. There are 0 homozygotes in gnomad4. There are 39 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High AC in GnomAd4 at 72 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GABRB2	NM_001371727.1 link	c.1349G>A	p.Ser450Asn	missense_variant	Exon 10 of 10	ENST00000393959.6	NP_001358656.1
GABRB2	NM_021911.3 link	c.1349G>A	p.Ser450Asn	missense_variant	Exon 11 of 11		NP_068711.1	P47870-2
GABRB2	NM_000813.3 link	c.1235G>A	p.Ser412Asn	missense_variant	Exon 10 of 10		NP_000804.1	P47870-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GABRB2	ENST00000393959.6 link	c.1349G>A	p.Ser450Asn	missense_variant	Exon 10 of 10	1	NM_001371727.1	ENSP00000377531.1		P47870-2

Frequencies

GnomAD3 genomes

AF:

0.000473

AC:

AN:

152186

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000565

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000882

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000497

AC:

125

AN:

251324

Hom.:

AF XY:

0.000486

AC XY:

AN XY:

135816

show subpopulations

Gnomad AFR exome

AF:

0.000185

Gnomad AMR exome

AF:

0.000550

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000139

Gnomad NFE exome

AF:

0.000827

Gnomad OTH exome

AF:

0.000978

GnomAD4 exome

AF:

0.000945

AC:

1382

AN:

1461846

Hom.:

Cov.:

AF XY:

0.000861

AC XY:

626

AN XY:

727224

show subpopulations

Gnomad4 AFR exome

AF:

0.000119

Gnomad4 AMR exome

AF:

0.000537

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.000281

Gnomad4 NFE exome

AF:

0.00117

Gnomad4 OTH exome

AF:

0.000629

GnomAD4 genome

AF:

0.000473

AC:

AN:

152186

Hom.:

Cov.:

AF XY:

0.000525

AC XY:

AN XY:

74334

show subpopulations

Gnomad4 AFR

AF:

0.0000965

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000565

Gnomad4 NFE

AF:

0.000882

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000534

Hom.:

Bravo

AF:

0.000484

TwinsUK

AF:

0.000809

AC:

ALSPAC

AF:

0.00182

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000814

AC:

ExAC

AF:

0.000552

AC:

EpiCase

AF:

0.000327

EpiControl

AF:

0.000652

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Mar 25, 2021

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Nov 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

GABRB2: BS2 -

Inborn genetic diseases

Benign:1

Oct 22, 2021

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Intellectual disability

Benign:1

Jan 27, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.093

BayesDel_addAF

Benign

-0.45

BayesDel_noAF

Benign

-0.44

CADD

Benign

DANN

Uncertain

0.97

DEOGEN2

Benign

0.21

T;T;.;T;.;T

Eigen

Benign

-0.24

Eigen_PC

Benign

-0.032

FATHMM_MKL

Uncertain

0.87

LIST_S2

Benign

0.85

.;D;.;T;T;T

M_CAP

Benign

0.014

MetaRNN

Benign

0.028

T;T;T;T;T;T

MetaSVM

Benign

-0.52

MutationAssessor

Benign

-0.13

N;N;.;.;.;.

PrimateAI

Uncertain

0.74

PROVEAN

Benign

-0.10

N;N;N;N;N;N

REVEL

Benign

0.26

Sift

Benign

0.41

T;T;T;T;T;T

Sift4G

Benign

0.53

T;T;T;T;T;T

Polyphen

0.0020

B;B;B;B;B;B

Vest4

0.057

MVP

0.39

MPC

0.29

ClinPred

0.019

GERP RS

4.7

Varity_R

0.17

gMVP

0.66

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