chr6-29572427-G-A

Position:

• chr6-29572427-G-A

Variant summary

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

The ENST00000355973.7(GABBR1):​c.*3-16077C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.222 in 151,992 control chromosomes in the GnomAD database, including 4,083 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 0.22 (4083 hom., cov: 32)
• Consequence: GABBR1 ENST00000355973.7 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.758

Genes affected

GABBR1 (HGNC:4070): (gamma-aminobutyric acid type B receptor subunit 1) This gene encodes a receptor for gamma-aminobutyric acid (GABA), which is the main inhibitory neurotransmitter in the mammalian central nervous system. This receptor functions as a heterodimer with GABA(B) receptor 2. Defects in this gene may underlie brain disorders such as schizophrenia and epilepsy. Alternative splicing generates multiple transcript variants, but the full-length nature of some of these variants has not been determined. [provided by RefSeq, Jan 2016]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.9).
• BA1: GnomAd4 highest subpopulation (SAS) allele frequency at 95% confidence interval = 0.381 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GABBR1	ENST00000355973.7	c.*3-16077C>T		intron_variant		2		ENSP00000348248

Frequencies

GnomAD3 genomes AF: 0.223 AC: 33804 AN: 151876 Hom.: 4084 Cov.: 32

Gnomad AFR AF: 0.263

Gnomad AMI AF: 0.129

Gnomad AMR AF: 0.188

Gnomad ASJ AF: 0.231

Gnomad EAS AF: 0.368

Gnomad SAS AF: 0.397

Gnomad FIN AF: 0.272

Gnomad MID AF: 0.294

Gnomad NFE AF: 0.174

Gnomad OTH AF: 0.245

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

GnomAD4 genome AF: 0.222 AC: 33818 AN: 151992 Hom.: 4083 Cov.: 32 AF XY: 0.230 AC XY: 17054 AN XY: 74282

Gnomad4 AFR AF: 0.263

Gnomad4 AMR AF: 0.188

Gnomad4 ASJ AF: 0.231

Gnomad4 EAS AF: 0.368

Gnomad4 SAS AF: 0.396

Gnomad4 FIN AF: 0.272

Gnomad4 NFE AF: 0.174

Gnomad4 OTH AF: 0.243

Alfa AF: 0.190 Hom.: 2130

Bravo AF: 0.217

Asia WGS AF: 0.315 AC: 1095 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.90
CADD	Benign	3.0
DANN	Benign	0.46

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs1003581; hg19: chr6-29540204;