Genetic Variant GABRB2:p.Ser450Asn (chr5-161294271-C-T) – ACMG Classification: Benign (-20 pts)

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_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. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S450T) has been classified as Uncertain significance.

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

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

complex neurodevelopmental disorder
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
developmental and epileptic encephalopathy 92
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Illumina, Labcorp Genetics (formerly Invitae), G2P
undetermined early-onset epileptic encephalopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

GABRB2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

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 Benign/Likely_benign. ClinVar VariationId 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 the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 72 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001371727.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
GABRB2	NM_001371727.1	MANE Select	c.1349G>A	p.Ser450Asn	missense	Exon 10 of 10	NP_001358656.1	P47870-2
GABRB2	NM_021911.3		c.1349G>A	p.Ser450Asn	missense	Exon 11 of 11	NP_068711.1	P47870-2
GABRB2	NM_000813.3		c.1235G>A	p.Ser412Asn	missense	Exon 10 of 10	NP_000804.1	P47870-1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
GABRB2	ENST00000393959.6	TSL:1 MANE Select	c.1349G>A	p.Ser450Asn	missense	Exon 10 of 10	ENSP00000377531.1	P47870-2
GABRB2	ENST00000353437.10	TSL:1	c.1235G>A	p.Ser412Asn	missense	Exon 10 of 10	ENSP00000274546.6	P47870-1
GABRB2	ENST00000520240.5	TSL:1	c.1235G>A	p.Ser412Asn	missense	Exon 10 of 10	ENSP00000429320.1	P47870-1

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

GnomAD2 exomes

AF:

0.000497

AC:

125

AN:

251324

AF XY:

0.000486

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 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

African (AFR)

AF:

0.000119

AC:

AN:

33476

American (AMR)

AF:

0.000537

AC:

AN:

44714

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000232

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.000281

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00117

AC:

1299

AN:

1111986

Other (OTH)

AF:

0.000629

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.474

Heterozygous variant carriers

170

254

339

424

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

116

174

232

290

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000473

AC:

AN:

152186

Hom.:

Cov.:

AF XY:

0.000525

AC XY:

AN XY:

74334

show subpopulations

African (AFR)

AF:

0.0000965

AC:

AN:

41450

American (AMR)

AF:

0.000131

AC:

AN:

15274

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.000565

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.000882

AC:

AN:

68034

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.492

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

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

ClinVar submissions

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (2)

Inborn genetic diseases (1)

Intellectual disability (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.093

BayesDel_addAF

Benign

-0.45

BayesDel_noAF

Benign

-0.44

CADD

Benign

(source)

DANN

Uncertain

0.97

DEOGEN2

Benign

0.21

Eigen

Benign

-0.24

Eigen_PC

Benign

-0.032

FATHMM_MKL

Uncertain

0.87

LIST_S2

Benign

0.85

M_CAP

Benign

0.014

MetaRNN

Benign

0.028

MetaSVM

Benign

-0.52

MutationAssessor

Benign

-0.13

PhyloP100

3.9

PrimateAI

Uncertain

0.74

PROVEAN

Benign

-0.10

REVEL

Benign

0.26

Sift

Benign

0.41

Sift4G

Benign

0.53

Polyphen

0.0020

Vest4

0.057

MVP

0.39

MPC

0.29

ClinPred

0.019

GERP RS

4.7

Varity_R

0.17

gMVP

0.66

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over