NM_000815.5:c.414G>A

Variant names:

Variant summary

Our verdict is Benign. The variant received -15 ACMG points: 0P and 15B. BP4_StrongBP6_ModerateBP7BS1BS2

The NM_000815.5(GABRD):c.414G>A(p.Thr138Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000908 in 1,613,010 control chromosomes in the GnomAD database, including 10 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

Frequency

Genomes: 𝑓 0.0043 ( 3 hom., cov: 34)

Exomes 𝑓: 0.00055 ( 7 hom. )

Consequence

GABRD
NM_000815.5 synonymous

Scores

Clinical Significance

Benign criteria provided, single submitter B:2

Conservation

PhyloP100: -8.92

Publications

0 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: Ambry Genetics, Labcorp Genetics (formerly Invitae)

GABRD links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -15 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.005391568).

BP6

Variant 1-2025682-G-A is Benign according to our data. Variant chr1-2025682-G-A is described in ClinVar as Benign. ClinVar VariationId is 460010.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=-8.92 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. GnomAdExome4 allele frequency = 0.00055 (803/1460620) while in subpopulation AFR AF = 0.0165 (553/33478). AF 95% confidence interval is 0.0154. There are 7 homozygotes in GnomAdExome4. There are 372 alleles in the male GnomAdExome4 subpopulation. Median coverage is 35. This position passed quality control check.

BS2

High AC in GnomAd4 at 662 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
GABRD	NM_000815.5 link	c.414G>A	p.Thr138Thr	synonymous_variant	Exon 4 of 9	ENST00000378585.7	NP_000806.2
GABRD	XM_017000936.2 link	c.1119G>A	p.Thr373Thr	synonymous_variant	Exon 3 of 8		XP_016856425.1
GABRD	XM_011541194.4 link	c.453G>A	p.Thr151Thr	synonymous_variant	Exon 4 of 9		XP_011539496.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GABRD	ENST00000378585.7 link	c.414G>A	p.Thr138Thr	synonymous_variant	Exon 4 of 9	1	NM_000815.5	ENSP00000367848.4

Frequencies

GnomAD3 genomes

AF:

0.00435

AC:

662

AN:

152272

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0149

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00163

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000132

Gnomad OTH

AF:

0.00478

GnomAD2 exomes

AF:

0.00116

AC:

291

AN:

250440

AF XY:

0.000987

show subpopulations

Gnomad AFR exome

AF:

0.0147

Gnomad AMR exome

AF:

0.000839

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000115

Gnomad OTH exome

AF:

0.00147

GnomAD4 exome

AF:

0.000550

AC:

803

AN:

1460620

Hom.:

Cov.:

AF XY:

0.000512

AC XY:

372

AN XY:

726622

show subpopulations

African (AFR)

AF:

0.0165

AC:

553

AN:

33478

American (AMR)

AF:

0.000850

AC:

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26130

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000696

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52228

Middle Eastern (MID)

AF:

0.00121

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000944

AC:

105

AN:

1111964

Other (OTH)

AF:

0.00156

AC:

AN:

60376

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.487

Heterozygous variant carriers

102

153

204

255

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<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:

0.00434

AC:

662

AN:

152390

Hom.:

Cov.:

AF XY:

0.00439

AC XY:

327

AN XY:

74520

show subpopulations

African (AFR)

AF:

0.0149

AC:

618

AN:

41598

American (AMR)

AF:

0.00163

AC:

AN:

15312

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5188

South Asian (SAS)

AF:

0.00

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000132

AC:

AN:

68042

Other (OTH)

AF:

0.00473

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.498

Heterozygous variant carriers

103

138

172

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:

0.00209

Hom.:

Bravo

AF:

0.00521

ESP6500AA

AF:

0.0141

AC:

ESP6500EA

AF:

0.000465

AC:

ExAC

AF:

0.00147

AC:

179

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.00

EpiControl

AF:

0.000415

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

GABRD-related disorder

Benign:1

Sep 09, 2019

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Idiopathic generalized epilepsy

Benign:1

Jan 27, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_noAF

Benign

-0.98

CADD

Benign

0.013

(source)

DANN

Benign

0.67

FATHMM_MKL

Benign

0.021

LIST_S2

Benign

0.27

MetaRNN

Benign

0.0054

PhyloP100

-8.9

GERP RS

-9.1

PromoterAI

-0.029

Neutral

(source)

Mutation Taster

=99/1

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over