6-29588032-C-G

Position:

• chr6-29588032-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_007160.4(OR2H2):​c.88C>G​(p.Leu30Val) variant causes a missense 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. 13/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L30F) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 30)
• Consequence: OR2H2 NM_007160.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.18

Genes affected

OR2H2 (HGNC:8253): (olfactory receptor family 2 subfamily H member 2) Olfactory receptors interact with odorant molecules in the nose, to initiate a neuronal response that triggers the perception of a smell. The olfactory receptor proteins are members of a large family of G-protein-coupled receptors (GPCR) arising from single coding-exon genes. Olfactory receptors share a 7-transmembrane domain structure with many neurotransmitter and hormone receptors and are responsible for the recognition and G protein-mediated transduction of odorant signals. The olfactory receptor gene family is the largest in the genome. The nomenclature assigned to the olfactory receptor genes and proteins for this organism is independent of other organisms. [provided by RefSeq, Jul 2008]

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 Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.07679662).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
OR2H2	NM_007160.4	c.88C>G	p.Leu30Val	missense_variant	2/2	ENST00000641840.1	NP_009091.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
OR2H2	ENST00000641840.1	c.88C>G	p.Leu30Val	missense_variant	2/2		NM_007160.4	ENSP00000492959.1
OR2H2	ENST00000383640.4	c.88C>G	p.Leu30Val	missense_variant	1/1	6		ENSP00000373136.2
GABBR1	ENST00000355973.7	c.*2+15509G>C		intron_variant		2		ENSP00000348248.3

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome Cov.: 13

GnomAD4 genome Cov.: 30

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.086
BayesDel_addAF	Benign	-0.32	T
BayesDel_noAF	Benign	-0.69
CADD	Benign	10
DANN	Uncertain	0.99
DEOGEN2	Benign	0.014	T;T
Eigen	Benign	-0.73
Eigen_PC	Benign	-0.89
FATHMM_MKL	Benign	0.18	N
M_CAP	Benign	0.0013	T
MetaRNN	Benign	0.077	T;T
MetaSVM	Benign	-0.99	T
MutationAssessor	Pathogenic	3.1	M;M
PrimateAI	Benign	0.19	T
PROVEAN	Benign	-2.0	.;N
REVEL	Benign	0.062
Sift	Uncertain	0.010	.;D
Sift4G	Uncertain	0.018	.;D
Polyphen		0.15	B;B
Vest4		0.17
MutPred		0.25		Loss of helix (P = 0.2271);Loss of helix (P = 0.2271);
MVP		0.12
MPC		0.24
ClinPred		0.20	T
GERP RS		0.68
Varity_R		0.074
gMVP		0.10

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs3129034; hg19: chr6-29555809;