GABRD p.Asp2Glu

Variant names:

• chr1-2019429-C-A
• NM_000815.5:c.6C>A
• GABRD p.Asp2Glu

Your query was ambiguous. Multiple possible variants found:

• chr1-2019429-C-A
• chr1-2019429-C-G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000815.5(GABRD):​c.6C>A​(p.Asp2Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar.

• Frequency:
  • Genomes: not found (cov: 26)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: GABRD NM_000815.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.35
• Publications: 0 publications found

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

ENSG00000233542 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.16914168).

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.6C>A	p.Asp2Glu	missense	Exon 1 of 9	NP_000806.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GABRD	ENST00000378585.7	TSL:1 MANE Select	c.6C>A	p.Asp2Glu	missense	Exon 1 of 9	ENSP00000367848.4	O14764
	GABRD	ENST00000638771.1	TSL:3	c.6C>A	p.Asp2Glu	missense	Exon 1 of 8	ENSP00000492435.1	A0A1W2PRC4
	GABRD	ENST00000640067.1	TSL:5	c.6C>A	p.Asp2Glu	missense	Exon 1 of 9	ENSP00000491844.1	A0A1W2PQR3

Frequencies

GnomAD3 genomes Cov.: 26

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 943702 Hom.: 0 Cov.: 29 AF XY: 0.00 AC XY: 0 AN XY: 446200

African (AFR) AF: 0.00 AC: 0 AN: 18188

American (AMR) AF: 0.00 AC: 0 AN: 4444

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 8462

East Asian (EAS) AF: 0.00 AC: 0 AN: 10704

South Asian (SAS) AF: 0.00 AC: 0 AN: 21474

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10808

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 2158

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 833664

Other (OTH) AF: 0.00 AC: 0 AN: 33800

GnomAD4 genome Cov.: 26

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.084
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.52
CADD	Benign	7.4
DANN	Benign	0.81
DEOGEN2	Benign	0.10	T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.00093	N
LIST_S2	Benign	0.34	T
M_CAP	Pathogenic	0.89	D
MetaRNN	Benign	0.17	T
MetaSVM	Benign	-0.84	T
MutationAssessor	Benign	0.0	N
PhyloP100		-1.3
PrimateAI	Pathogenic	0.88	D
PROVEAN	Benign	-0.18	N
REVEL	Benign	0.15
Sift	Benign	1.0	T
Sift4G	Benign	0.55	T
PromoterAI		-0.049	Neutral
Varity_R		0.069
gMVP		0.34
Mutation Taster		=93/7	polymorphism

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr1-1950868;