chr15-26677054-A-C

Position:

• chr15-26677054-A-C

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_000814.6(GABRB3):​c.241-55520T>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.727 in 152,030 control chromosomes in the GnomAD database, including 40,452 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.73 (40452 hom., cov: 31)
• Consequence: GABRB3 NM_000814.6 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -4.04

Genes affected

GABRB3 (HGNC:4083): (gamma-aminobutyric acid type A receptor subunit beta3) This gene encodes a member of the ligand-gated ionic channel family. The encoded protein is one the subunits of a multi-subunit chloride channel that serves as the receptor for gamma-aminobutyric acid, a major inhibitory neurotransmitter of the mammalian nervous system. This gene is located on the long arm of chromosome 15 in a cluster with two other genes encoding related subunits of the family. This gene may be associated with the pathogenesis of several disorders including Angelman syndrome, Prader-Willi syndrome, nonsyndromic orofacial clefts, epilepsy and autism. Alternatively spliced transcript variants encoding distinct isoforms have been described. [provided by RefSeq, Jul 2013]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-1.03).
• BA1: GnomAd4 highest subpopulation (AMR) allele frequency at 95% confidence interval = 0.792 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GABRB3	NM_000814.6	c.241-55520T>G		intron_variant		ENST00000311550.10	NP_000805.1
GABRB3	NM_001191320.2	c.-16+39560T>G		intron_variant			NP_001178249.1
GABRB3	NM_001278631.2	c.-111-34526T>G		intron_variant			NP_001265560.1
GABRB3	NM_021912.5	c.241-55520T>G		intron_variant			NP_068712.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GABRB3	ENST00000311550.10	c.241-55520T>G		intron_variant		1	NM_000814.6	ENSP00000308725	P1

Frequencies

GnomAD3 genomes AF: 0.727 AC: 110456 AN: 151912 Hom.: 40397 Cov.: 31

Gnomad AFR AF: 0.705

Gnomad AMI AF: 0.897

Gnomad AMR AF: 0.804

Gnomad ASJ AF: 0.656

Gnomad EAS AF: 0.484

Gnomad SAS AF: 0.705

Gnomad FIN AF: 0.755

Gnomad MID AF: 0.741

Gnomad NFE AF: 0.740

Gnomad OTH AF: 0.738

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.727 AC: 110564 AN: 152030 Hom.: 40452 Cov.: 31 AF XY: 0.728 AC XY: 54096 AN XY: 74290

Gnomad4 AFR AF: 0.706

Gnomad4 AMR AF: 0.804

Gnomad4 ASJ AF: 0.656

Gnomad4 EAS AF: 0.484

Gnomad4 SAS AF: 0.706

Gnomad4 FIN AF: 0.755

Gnomad4 NFE AF: 0.740

Gnomad4 OTH AF: 0.733

Alfa AF: 0.683 Hom.: 4249

Bravo AF: 0.732

Asia WGS AF: 0.611 AC: 2128 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-1.0
CADD	Benign	0.018
DANN	Benign	0.40

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

Other links and lift over

dbSNP: rs890317; hg19: chr15-26922201;