Variant 5-162067718-C-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBS1_SupportingBS2

The ENST00000639111.2(GABRG2):c.-282C>T variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000154 in 609,246 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00017 ( 0 hom. )

Consequence

GABRG2
ENST00000639111.2 5_prime_UTR

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.362

Variant links:

Genes affected

GABRG2 (HGNC:4087): (gamma-aminobutyric acid type A receptor subunit gamma2) This gene encodes a gamma-aminobutyric acid (GABA) receptor. GABA is the major inhibitory neurotransmitter in the mammlian brain, where it acts at GABA-A receptors, which are ligand-gated chloride channels. GABA-A receptors are pentameric, consisting of proteins from several subunit classes: alpha, beta, gamma, delta and rho. Mutations in this gene have been associated with epilepsy and febrile seizures. Multiple transcript variants encoding different isoforms have been identified for this gene. [provided by RefSeq, Jul 2008]

GABRG2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.83).

BS1

Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.000118 (18/151998) while in subpopulation AMR AF= 0.000459 (7/15248). AF 95% confidence interval is 0.000215. There are 0 homozygotes in gnomad4. There are 11 alleles in male gnomad4 subpopulation. Median coverage is 31. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High AC in GnomAd4 at 18 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	#exon/exons	Protein
GABRG2	NM_000816.3 linkuse as main transcript	c.-282C>T	5_prime_UTR_variant	1/9	NP_000807.2
GABRG2	NM_001375339.1 linkuse as main transcript	c.-282C>T	5_prime_UTR_variant	1/10	NP_001362268.1
GABRG2	NM_001375340.1 linkuse as main transcript	c.-282C>T	5_prime_UTR_variant	1/9	NP_001362269.1

Ensembl

Gene	Transcript	HGVSc	Effect	#exon/exons	TSL	Protein	Appris	UniProt
GABRG2	ENST00000639111.2 linkuse as main transcript	c.-282C>T	5_prime_UTR_variant	1/9	1	ENSP00000492125	P3	P18507-1
GABRG2	ENST00000638772.1 linkuse as main transcript	c.-282C>T	5_prime_UTR_variant	1/8	5	ENSP00000491557
GABRG2	ENST00000639384.1 linkuse as main transcript	c.-282C>T	5_prime_UTR_variant	1/9	5	ENSP00000491240

Frequencies

GnomAD3 genomes

AF:

0.000118

AC:

AN:

151998

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000459

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:

0.000147

Gnomad OTH

AF:

0.000479

GnomAD4 exome

AF:

0.000166

AC:

AN:

457248

Hom.:

Cov.:

AF XY:

0.000148

AC XY:

AN XY:

242540

show subpopulations

Gnomad4 AFR exome

AF:

0.0000796

Gnomad4 AMR exome

AF:

0.000319

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000222

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000224

Gnomad4 OTH exome

AF:

0.000227

GnomAD4 genome

AF:

0.000118

AC:

AN:

151998

Hom.:

Cov.:

AF XY:

0.000148

AC XY:

AN XY:

74242

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000459

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000147

Gnomad4 OTH

AF:

0.000479

Alfa

AF:

0.0000693

Hom.:

Bravo

AF:

0.000132

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Epilepsy, childhood absence 2

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.83

CADD

Benign

4.4

DANN

Benign

0.75

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