Variant 15-27527607-C-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_033223.5(GABRG3):c.1040C>G(p.Thr347Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,459,286 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

GABRG3
NM_033223.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.301

Variant links:

Genes affected

GABRG3 (HGNC:4088): (gamma-aminobutyric acid type A receptor subunit gamma3) This gene encodes a gamma-aminobutyric acid (GABA) receptor. 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. GABA-A receptors are pentameric, consisting of proteins from several subunit classes: alpha, beta, gamma, delta and rho. The protein encoded by this gene is a gamma subunit, which contains the benzodiazepine binding site. Two transcript variants encoding distinct isoforms have been found for this gene. [provided by RefSeq, Aug 2012]

GABRG3 links:

(HGNC:):

links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.038129687).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GABRG3	NM_033223.5 linkuse as main transcript	c.1040C>G	p.Thr347Ser	missense_variant	8/10	ENST00000615808.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GABRG3	ENST00000615808.5 linkuse as main transcript	c.1040C>G	p.Thr347Ser	missense_variant	8/10	1	NM_033223.5	P1	Q99928-1
	ENST00000556642.1 linkuse as main transcript	n.85+13506G>C		intron_variant, non_coding_transcript_variant		2
GABRG3	ENST00000333743.10 linkuse as main transcript	c.503C>G	p.Thr168Ser	missense_variant	5/7	5
GABRG3	ENST00000451330.2 linkuse as main transcript	c.329C>G	p.Thr110Ser	missense_variant	2/4	3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1459286

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

725678

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:

9.00e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

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

Dec 12, 2023

The c.1040C>G (p.T347S) alteration is located in exon 8 (coding exon 8) of the GABRG3 gene. This alteration results from a C to G substitution at nucleotide position 1040, causing the threonine (T) at amino acid position 347 to be replaced by a serine (S). 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

0.069

BayesDel_addAF

Benign

-0.21

BayesDel_noAF

Benign

-0.54

CADD

Benign

1.3

DANN

Benign

0.57

DEOGEN2

Benign

0.15

T;.

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.11

LIST_S2

Benign

0.043

T;T

M_CAP

Benign

0.0099

MetaRNN

Benign

0.038

T;T

MetaSVM

Benign

-0.94

MutationAssessor

Benign

-0.66

N;.

MutationTaster

Benign

1.0

PrimateAI

Benign

0.28

REVEL

Benign

0.14

Sift4G

Benign

0.80

T;T

Polyphen

0.0

B;.

Vest4

0.061

MutPred

0.28

Gain of catalytic residue at T347 (P = 0.0594);.;

MVP

0.43

MPC

0.50

ClinPred

0.052

GERP RS

2.2

Varity_R

0.039

gMVP

0.26

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

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over