Variant X-152651553-C-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_018558.4(GABRQ):c.929C>T(p.Thr310Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000266 in 112,725 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.000027 ( 0 hom., 1 hem., cov: 24)

Consequence

GABRQ
NM_018558.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.91

Variant links:

Genes affected

GABRQ (HGNC:14454): (gamma-aminobutyric acid type A receptor subunit theta) The gamma-aminobutyric acid (GABA) A receptor is a multisubunit chloride channel that mediates the fastest inhibitory synaptic transmission in the central nervous system. This gene encodes the theta subunit of the GABA A receptor. The gene is mapped to chromosome Xq28 in a cluster of genes including those that encode the alpha 3 and epsilon subunits of the GABA A receptor. [provided by RefSeq, Jul 2017]

GABRQ links:

MAGEA3-DT (HGNC:):

MAGEA3-DT links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.873

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GABRQ	NM_018558.4 linkuse as main transcript	c.929C>T	p.Thr310Ile	missense_variant	8/9	ENST00000598523.3	NP_061028.3	Q9UN88

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GABRQ	ENST00000598523.3 linkuse as main transcript	c.929C>T	p.Thr310Ile	missense_variant	8/9	1	NM_018558.4	ENSP00000469332.1		Q9UN88
MAGEA3-DT	ENST00000671457.1 linkuse as main transcript	n.130-11759G>A		intron_variant

Frequencies

GnomAD3 genomes

AF:

0.0000266

AC:

AN:

112725

Hom.:

Cov.:

AF XY:

0.0000287

AC XY:

AN XY:

34857

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000186

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:

0.0000188

Gnomad OTH

AF:

0.00

GnomAD4 exome

Cov.:

GnomAD4 genome

AF:

0.0000266

AC:

AN:

112725

Hom.:

Cov.:

AF XY:

0.0000287

AC XY:

AN XY:

34857

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000186

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000188

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000680

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

Nov 09, 2024

The c.929C>T (p.T310I) alteration is located in exon 8 (coding exon 8) of the GABRQ gene. This alteration results from a C to T substitution at nucleotide position 929, causing the threonine (T) at amino acid position 310 to be replaced by an isoleucine (I). 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

Pathogenic

0.72

BayesDel_addAF

Uncertain

0.086

BayesDel_noAF

Benign

-0.11

CADD

Benign

DANN

Uncertain

1.0

FATHMM_MKL

Pathogenic

0.98

M_CAP

Benign

0.079

MetaRNN

Pathogenic

0.87

MetaSVM

Uncertain

0.76

PrimateAI

Benign

0.41

Sift4G

Pathogenic

0.0010

Vest4

0.67

MutPred

0.59

Loss of glycosylation at T310 (P = 0.0343);

MVP

0.89

ClinPred

0.93

GERP RS

5.0

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