NM_005458.8:c.2796C>G

Variant names:

• chr9-98290614-G-C
• NM_005458.8:c.2796C>G

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The NM_005458.8(GABBR2):​c.2796C>G​(p.Pro932Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: GABBR2 NM_005458.8 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.495

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]

ACMG classification

Verdict is Likely_benign. Variant got -5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.52).
• BP6: Variant 9-98290614-G-C is Benign according to our data. Variant chr9-98290614-G-C is described in ClinVar as [Likely_benign]. Clinvar id is 3684190.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=0.495 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GABBR2	NM_005458.8	c.2796C>G	p.Pro932Pro	synonymous_variant	Exon 19 of 19	ENST00000259455.4	NP_005449.5
GABBR2	XM_017015331.3	c.2502C>G	p.Pro834Pro	synonymous_variant	Exon 18 of 18		XP_016870820.1
GABBR2	XM_005252316.6	c.2022C>G	p.Pro674Pro	synonymous_variant	Exon 17 of 17		XP_005252373.1
GABBR2	XM_017015332.3	c.2022C>G	p.Pro674Pro	synonymous_variant	Exon 16 of 16		XP_016870821.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GABBR2	ENST00000259455.4	c.2796C>G	p.Pro932Pro	synonymous_variant	Exon 19 of 19	1	NM_005458.8	ENSP00000259455.2
GABBR2	ENST00000637410.1	n.*33C>G		downstream_gene_variant		5

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Epileptic encephalopathy Benign:1

Apr 24, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.52
CADD	Benign	9.7
DANN	Benign	0.66

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.

Other links and lift over

hg19: chr9-101052896;