9-98489394-T-C

Position:

• chr9-98489394-T-C

Variant summary

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

The NM_005458.8(GABBR2):​c.732+7019A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.967 in 152,300 control chromosomes in the GnomAD database, including 71,273 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 0.97 (71273 hom., cov: 32)
• Consequence: GABBR2 NM_005458.8 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.683

Genes affected

GABBR2 (HGNC:4507): (gamma-aminobutyric acid type B receptor subunit 2) The multi-pass membrane protein encoded by this gene belongs to the G-protein coupled receptor 3 family and GABA-B receptor subfamily. The GABA-B receptors inhibit neuronal activity through G protein-coupled second-messenger systems, which regulate the release of neurotransmitters, and the activity of ion channels and adenylyl cyclase. This receptor subunit forms an active heterodimeric complex with GABA-B receptor subunit 1, neither of which is effective on its own. Allelic variants of this gene have been associated with nicotine dependence.[provided by RefSeq, Jan 2010]

GABBR2 (HGNC:):

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.97).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.984 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GABBR2	NM_005458.8	c.732+7019A>G		intron_variant		ENST00000259455.4	NP_005449.5
GABBR2	XM_017015331.3	c.438+7019A>G		intron_variant			XP_016870820.1
GABBR2	XM_005252316.6	c.-43+7019A>G		intron_variant			XP_005252373.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GABBR2	ENST00000259455.4	c.732+7019A>G		intron_variant		1	NM_005458.8	ENSP00000259455.2

Frequencies

GnomAD3 genomes AF: 0.967 AC: 147194 AN: 152182 Hom.: 71216 Cov.: 32

Gnomad AFR AF: 0.992

Gnomad AMI AF: 0.986

Gnomad AMR AF: 0.951

Gnomad ASJ AF: 0.991

Gnomad EAS AF: 0.912

Gnomad SAS AF: 0.959

Gnomad FIN AF: 0.969

Gnomad MID AF: 0.984

Gnomad NFE AF: 0.959

Gnomad OTH AF: 0.964

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

GnomAD4 genome AF: 0.967 AC: 147308 AN: 152300 Hom.: 71273 Cov.: 32 AF XY: 0.967 AC XY: 71979 AN XY: 74460

Gnomad4 AFR AF: 0.992

Gnomad4 AMR AF: 0.950

Gnomad4 ASJ AF: 0.991

Gnomad4 EAS AF: 0.912

Gnomad4 SAS AF: 0.960

Gnomad4 FIN AF: 0.969

Gnomad4 NFE AF: 0.959

Gnomad4 OTH AF: 0.961

Alfa AF: 0.964 Hom.: 11485

Bravo AF: 0.969

Asia WGS AF: 0.941 AC: 3271 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.97
CADD	Benign	1.2
DANN	Benign	0.41

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: rs2779550; hg19: chr9-101251676;