Variant 1-2019477-G-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_000815.5(GABRD):c.54G>T(p.Gln18His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000332 in 1,113,682 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 27)

Exomes 𝑓: 0.000035 ( 0 hom. )

Consequence

GABRD
NM_000815.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.626

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 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.14740586).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GABRD	NM_000815.5 linkuse as main transcript	c.54G>T	p.Gln18His	missense_variant	1/9	ENST00000378585.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GABRD	ENST00000378585.7 linkuse as main transcript	c.54G>T	p.Gln18His	missense_variant	1/9	1	NM_000815.5	P1

Frequencies

GnomAD3 genomes

AF:

0.0000202

AC:

AN:

148412

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000490

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000150

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.0000352

AC:

AN:

965270

Hom.:

Cov.:

AF XY:

0.0000375

AC XY:

AN XY:

453744

show subpopulations

Gnomad4 AFR exome

AF:

0.0000527

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000390

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000202

AC:

AN:

148412

Hom.:

Cov.:

AF XY:

0.0000276

AC XY:

AN XY:

72372

show subpopulations

Gnomad4 AFR

AF:

0.0000490

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000150

Gnomad4 OTH

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 17, 2023

The c.54G>T (p.Q18H) alteration is located in exon 1 (coding exon 1) of the GABRD gene. This alteration results from a G to T substitution at nucleotide position 54, causing the glutamine (Q) at amino acid position 18 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.087

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.49

CADD

Benign

8.6

DANN

Benign

0.41

DEOGEN2

Benign

0.11

T;.;.;.;.

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.0015

LIST_S2

Benign

0.34

T;T;T;T;T

M_CAP

Pathogenic

0.80

MetaRNN

Benign

0.15

T;T;T;T;T

MetaSVM

Benign

-0.91

MutationAssessor

Benign

0.55

N;.;.;.;.

MutationTaster

Benign

1.0

PrimateAI

Pathogenic

0.82

PROVEAN

Benign

-0.17

N;.;.;.;.

REVEL

Benign

0.11

Sift

Benign

0.21

T;.;.;.;.

Sift4G

Benign

0.58

T;.;.;.;.

Polyphen

0.0

B;.;.;.;.

Vest4

0.14

MutPred

0.46

Loss of helix (P = 0.028);Loss of helix (P = 0.028);Loss of helix (P = 0.028);Loss of helix (P = 0.028);Loss of helix (P = 0.028);

MVP

0.22

MPC

0.71

ClinPred

0.033

GERP RS

-0.32

Varity_R

0.044

gMVP

0.47

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