Variant 4-46928416-T-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_000809.4(GABRA4):c.1474A>G(p.Thr492Ala) variant causes a missense change. The variant allele was found at a frequency of 0.0000062 in 1,613,462 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000062 ( 0 hom. )

Consequence

GABRA4
NM_000809.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.20

Variant links:

Genes affected

GABRA4 (HGNC:4078): (gamma-aminobutyric acid type A receptor subunit alpha4) 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. At least 16 distinct subunits of GABA-A receptors have been identified. This gene encodes subunit alpha-4, which is involved in the etiology of autism and eventually increases autism risk through interaction with another subunit, gamma-aminobutyric acid receptor beta-1 (GABRB1). Alternatively spliced transcript variants encoding different isoforms have been found in this gene.[provided by RefSeq, Feb 2011]

GABRA4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.09425518).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
GABRA4	NM_000809.4 linkuse as main transcript	c.1474A>G	p.Thr492Ala	missense_variant	9/9	ENST00000264318.4
GABRA4	NM_001204266.2 linkuse as main transcript	c.1417A>G	p.Thr473Ala	missense_variant	9/9
GABRA4	NM_001204267.2 linkuse as main transcript	c.1264A>G	p.Thr422Ala	missense_variant	8/8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
GABRA4	ENST00000264318.4 linkuse as main transcript	c.1474A>G	p.Thr492Ala	missense_variant	9/9	1	NM_000809.4	P1
GABRA4	ENST00000508560.5 linkuse as main transcript	c.*1295A>G		3_prime_UTR_variant, NMD_transcript_variant	9/9	3
GABRA4	ENST00000511523.5 linkuse as main transcript	c.*1142A>G		3_prime_UTR_variant, NMD_transcript_variant	8/8	3

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

151984

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000616

AC:

AN:

1461478

Hom.:

Cov.:

AF XY:

0.00000688

AC XY:

AN XY:

727028

show subpopulations

Gnomad4 AFR exome

AF:

0.00

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:

0.00000810

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000658

AC:

AN:

151984

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74254

show subpopulations

Gnomad4 AFR

AF:

0.00

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:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 08, 2024

The c.1474A>G (p.T492A) alteration is located in exon 9 (coding exon 9) of the GABRA4 gene. This alteration results from a A to G substitution at nucleotide position 1474, causing the threonine (T) at amino acid position 492 to be replaced by an alanine (A). 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

0.066

BayesDel_addAF

Benign

-0.14

BayesDel_noAF

Benign

-0.44

Cadd

Benign

Dann

Benign

0.92

DEOGEN2

Benign

0.19

Eigen

Benign

-0.53

Eigen_PC

Benign

-0.46

FATHMM_MKL

Uncertain

0.83

LIST_S2

Benign

0.57

M_CAP

Benign

0.026

MetaRNN

Benign

0.094

MetaSVM

Benign

-0.83

MutationAssessor

Benign

1.8

MutationTaster

Benign

1.0

PrimateAI

Benign

0.33

PROVEAN

Benign

-0.40

REVEL

Benign

0.15

Sift

Uncertain

0.015

Sift4G

Benign

0.35

Polyphen

0.0050

Vest4

0.027

MutPred

0.26

Loss of loop (P = 0.0235);

MVP

0.53

MPC

0.060

ClinPred

0.17

GERP RS

3.4

Varity_R

0.080

gMVP

0.43

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