Genetic Variant OR2T3:p.Met123Thr (chr1-248473718-T-C) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_001005495.1(OR2T3):c.368T>C(p.Met123Thr) variant causes a missense change. The variant allele was found at a frequency of 0.0000596 in 1,611,616 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 26)

Exomes 𝑓: 0.000064 ( 0 hom. )

Consequence

OR2T3
NM_001005495.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.73

Variant links:

Genes affected

OR2T3 (HGNC:14727): (olfactory receptor family 2 subfamily T member 3) 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]

OR2T3 links:

LOC105373279 (HGNC:):

LOC105373279 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OR2T3	NM_001005495.1 link	c.368T>C	p.Met123Thr	missense_variant	Exon 1 of 1	ENST00000359594.3	NP_001005495.1	Q8NH03A0A126GVW5
LOC105373279	XR_007067006.1 link	n.136-3559A>G		intron_variant	Intron 1 of 2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
OR2T3	ENST00000359594.3 link	c.368T>C	p.Met123Thr	missense_variant	Exon 1 of 1	6	NM_001005495.1	ENSP00000352604.2		Q8NH03

Frequencies

GnomAD3 genomes

AF:

0.0000199

AC:

AN:

150728

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000442

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000240

AC:

AN:

250076

Hom.:

AF XY:

0.0000148

AC XY:

AN XY:

135234

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000531

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000637

AC:

AN:

1460888

Hom.:

Cov.:

AF XY:

0.0000605

AC XY:

AN XY:

726796

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:

0.0000819

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000199

AC:

AN:

150728

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

73536

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000442

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000302

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jun 01, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.368T>C (p.M123T) alteration is located in exon 1 (coding exon 1) of the OR2T3 gene. This alteration results from a T to C substitution at nucleotide position 368, causing the methionine (M) at amino acid position 123 to be replaced by a threonine (T). 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

Uncertain

0.44

BayesDel_addAF

Benign

-0.077

BayesDel_noAF

Benign

-0.19

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.010

Eigen

Uncertain

0.50

Eigen_PC

Uncertain

0.30

FATHMM_MKL

Uncertain

0.95

M_CAP

Benign

0.0032

MetaRNN

Uncertain

0.65

MetaSVM

Benign

-1.1

MutationAssessor

Pathogenic

3.4

PrimateAI

Benign

0.45

PROVEAN

Pathogenic

-5.7

REVEL

Benign

0.17

Sift

Uncertain

0.0020

Sift4G

Pathogenic

0.0

Polyphen

1.0

Vest4

0.42

MVP

0.82

ClinPred

0.73

GERP RS

2.6

Varity_R

0.70

gMVP

0.23

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