rs148908731

Variant names:

Variant summary

Our verdict is Benign. The variant received -7 ACMG points: 2P and 9B. PM1BP4_StrongBP6BS2

The NM_000815.5(GABRD):c.775G>A(p.Val259Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000102 in 1,566,038 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 12/15 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. V259V) has been classified as Benign.

Frequency

Genomes: 𝑓 0.00039 ( 1 hom., cov: 34)

Exomes 𝑓: 0.000071 ( 0 hom. )

Consequence

GABRD
NM_000815.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:2

Conservation

PhyloP100: 0.991

Publications

3 publications found

Variant links:

Genes affected

GABRD (HGNC:4084): (gamma-aminobutyric acid type A receptor subunit delta) Gamma-aminobutyric acid (GABA) is the major inhibitory neurotransmitter in the mammalian brain where it acts at GABA-A receptors, which are ligand-gated chloride channels. Chloride conductance of these channels can be modulated by agents such as benzodiazepines that bind to the GABA-A receptor. The GABA-A receptor is generally pentameric and there are five types of subunits: alpha, beta, gamma, delta, and rho. This gene encodes the delta subunit. Mutations in this gene have been associated with susceptibility to generalized epilepsy with febrile seizures, type 5. Alternatively spliced transcript variants have been described for this gene, but their biological validity has not been determined. [provided by RefSeq, Jul 2008]

GABRD Gene-Disease associations (from GenCC):

complex neurodevelopmental disorder
Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics, ClinGen
epilepsy
Inheritance: AD Classification: LIMITED Submitted by: ClinGen
epilepsy, idiopathic generalized, susceptibility to, 10
Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics

GABRD links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -7 ACMG points.

PM1

In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in NM_000815.5

BP4

Computational evidence support a benign effect (MetaRNN=0.008660853).

BP6

Variant 1-2029194-G-A is Benign according to our data. Variant chr1-2029194-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 235308.

BS2

High AC in GnomAd4 at 60 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000815.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GABRD	NM_000815.5	MANE Select	c.775G>A	p.Val259Ile	missense	Exon 7 of 9	NP_000806.2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
GABRD	ENST00000378585.7	TSL:1 MANE Select	c.775G>A	p.Val259Ile	missense	Exon 7 of 9	ENSP00000367848.4	O14764
GABRD	ENST00000638771.1	TSL:3	c.775G>A	p.Val259Ile	missense	Exon 7 of 8	ENSP00000492435.1	A0A1W2PRC4
GABRD	ENST00000640067.1	TSL:5	c.859G>A	p.Val287Ile	missense	Exon 7 of 9	ENSP00000491844.1	A0A1W2PQR3

Frequencies

GnomAD3 genomes

AF:

0.000394

AC:

AN:

152246

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00113

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.000956

GnomAD2 exomes

AF:

0.0000890

AC:

AN:

179708

AF XY:

0.0000942

show subpopulations

Gnomad AFR exome

AF:

0.000664

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000230

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000526

Gnomad OTH exome

AF:

0.000404

GnomAD4 exome

AF:

0.0000707

AC:

100

AN:

1413674

Hom.:

Cov.:

AF XY:

0.0000587

AC XY:

AN XY:

699056

show subpopulations

African (AFR)

AF:

0.000654

AC:

AN:

32102

American (AMR)

AF:

0.000108

AC:

AN:

37180

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25430

East Asian (EAS)

AF:

0.000108

AC:

AN:

36902

South Asian (SAS)

AF:

0.0000249

AC:

AN:

80454

European-Finnish (FIN)

AF:

0.00

AC:

AN:

48090

Middle Eastern (MID)

AF:

0.000175

AC:

AN:

5720

European-Non Finnish (NFE)

AF:

0.0000533

AC:

AN:

1088940

Other (OTH)

AF:

0.000170

AC:

AN:

58856

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.476

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

AF:

0.000394

AC:

AN:

152364

Hom.:

Cov.:

AF XY:

0.000336

AC XY:

AN XY:

74508

show subpopulations

African (AFR)

AF:

0.00113

AC:

AN:

41582

American (AMR)

AF:

0.000261

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.000193

AC:

AN:

5184

South Asian (SAS)

AF:

0.00

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10632

Middle Eastern (MID)

AF:

0.00680

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000588

AC:

AN:

68034

Other (OTH)

AF:

0.000946

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.521

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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:

0.000166

Hom.:

Bravo

AF:

0.000487

ESP6500AA

AF:

0.00137

AC:

ESP6500EA

AF:

0.000117

AC:

ExAC

AF:

0.000144

AC:

Asia WGS

AF:

0.00144

AC:

AN:

3478

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

EEG abnormality (1)

GABRD-related disorder (1)

Idiopathic generalized epilepsy (1)

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.059

BayesDel_addAF

Benign

-0.41

BayesDel_noAF

Benign

-0.43

CADD

Benign

0.32

(source)

DANN

Benign

0.69

Eigen

Benign

-1.4

Eigen_PC

Benign

-1.3

FATHMM_MKL

Benign

0.20

LIST_S2

Benign

0.31

M_CAP

Benign

0.054

MetaRNN

Benign

0.0087

PhyloP100

0.99

ClinPred

0.0022

GERP RS

-3.2

Varity_R

0.019

Mutation Taster

=97/3

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

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over