Variant 1-247921697-G-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001005522.2(OR2T8):c.680G>A(p.Arg227His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000208 in 1,395,744 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R227C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000058 ( 0 hom., cov: 17)

Exomes 𝑓: 0.000021 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

OR2T8
NM_001005522.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -2.43

Variant links:

Genes affected

OR2T8 (HGNC:15020): (olfactory receptor family 2 subfamily T member 8) 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]

OR2T8 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.04724902).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
OR2T8	NM_001005522.2 linkuse as main transcript	c.680G>A	p.Arg227His	missense_variant	2/2	ENST00000641945.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
OR2T8	ENST00000641945.2 linkuse as main transcript	c.680G>A	p.Arg227His	missense_variant	2/2		NM_001005522.2	P1

Frequencies

GnomAD3 genomes

AF:

0.00

AC:

AN:

138124

Hom.:

Cov.:

FAILED QC

Gnomad AFR

AF:

0.0000265

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000251

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000943

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.0000208

AC:

AN:

1395744

Hom.:

Cov.:

AF XY:

0.0000244

AC XY:

AN XY:

696006

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000266

Gnomad4 OTH exome

AF:

0.0000172

GnomAD4 genome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.0000579

AC:

AN:

138234

Hom.:

Cov.:

AF XY:

0.0000302

AC XY:

AN XY:

66300

show subpopulations

Gnomad4 AFR

AF:

0.0000265

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000252

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000943

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000480

Hom.:

ExAC

AF:

0.0000169

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 27, 2024

The c.680G>A (p.R227H) alteration is located in exon 1 (coding exon 1) of the OR2T8 gene. This alteration results from a G to A substitution at nucleotide position 680, causing the arginine (R) at amino acid position 227 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.071

BayesDel_addAF

Benign

-0.32

BayesDel_noAF

Benign

-0.70

CADD

Benign

4.0

DANN

Benign

0.45

DEOGEN2

Benign

0.0020

T;T

Eigen

Benign

-1.6

Eigen_PC

Benign

-1.6

FATHMM_MKL

Benign

0.017

LIST_S2

Benign

0.78

.;T

M_CAP

Benign

0.00096

MetaRNN

Benign

0.047

T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.44

N;N

MutationTaster

Benign

1.0

PrimateAI

Benign

0.21

PROVEAN

Benign

-0.63

.;N

REVEL

Benign

0.011

Sift

Benign

0.42

.;T

Sift4G

Benign

0.52

.;T

Polyphen

0.021

B;B

Vest4

0.055

MutPred

0.38

Gain of glycosylation at S228 (P = 0.0859);Gain of glycosylation at S228 (P = 0.0859);

MVP

0.41

ClinPred

0.015

GERP RS

-2.8

Varity_R

0.030

gMVP

0.072

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over