Genetic Variant OR8J3:p.Met255Ile (chr11-56136954-C-A) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001004064.2(OR8J3):c.765G>T(p.Met255Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,498 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 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. M255T) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

OR8J3
NM_001004064.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -5.68

Publications

0 publications found

Variant links:

Genes affected

OR8J3 (HGNC:15312): (olfactory receptor family 8 subfamily J member 3) Predicted to enable odorant binding activity and olfactory receptor activity. Predicted to be involved in G protein-coupled receptor signaling pathway and sensory perception of smell. Predicted to be located in plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

OR8J3 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.046479523).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OR8J3	NM_001004064.2 link	c.765G>T	p.Met255Ile	missense_variant	Exon 2 of 2	ENST00000642058.1	NP_001004064.1	Q8NGG0A0A126GVE3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OR8J3	ENST00000642058.1 link	c.765G>T	p.Met255Ile	missense_variant	Exon 2 of 2	NM_001004064.2	ENSP00000493166.1	Q8NGG0
OR8J3	ENST00000641913.1 link	c.765G>T	p.Met255Ile	missense_variant	Exon 2 of 2		ENSP00000493417.1	Q8NGG0
OR8J3	ENST00000641489.1 link	n.114G>T		non_coding_transcript_exon_variant	Exon 2 of 2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461498

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727034

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33460

American (AMR)

AF:

0.00

AC:

AN:

44658

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26102

East Asian (EAS)

AF:

0.00

AC:

AN:

39690

South Asian (SAS)

AF:

0.00

AC:

AN:

86164

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53410

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1111878

Other (OTH)

AF:

0.00

AC:

AN:

60374

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 16, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.765G>T (p.M255I) alteration is located in exon 1 (coding exon 1) of the OR8J3 gene. This alteration results from a G to T substitution at nucleotide position 765, causing the methionine (M) at amino acid position 255 to be replaced by an isoleucine (I). 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

0.29

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.78

CADD

Benign

0.74

(source)

DANN

Benign

0.64

DEOGEN2

Benign

0.0014

T;T;T

Eigen

Benign

-1.8

Eigen_PC

Benign

-1.9

FATHMM_MKL

Benign

0.0044

LIST_S2

Benign

0.24

.;.;T

M_CAP

Benign

0.00056

MetaRNN

Benign

0.046

T;T;T

MetaSVM

Benign

-0.94

MutationAssessor

Benign

-1.3

N;N;N

PhyloP100

-5.7

PrimateAI

Benign

0.17

PROVEAN

Benign

0.0

.;.;N

REVEL

Benign

0.040

Sift

Benign

0.042

.;.;D

Sift4G

Benign

0.26

.;.;T

Polyphen

0.0

B;B;B

Vest4

0.067

MutPred

0.35

Gain of catalytic residue at M255 (P = 0.1026);Gain of catalytic residue at M255 (P = 0.1026);Gain of catalytic residue at M255 (P = 0.1026);

MVP

0.11

MPC

0.0093

ClinPred

0.17

GERP RS

-5.9

Varity_R

0.068

gMVP

0.14

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.070

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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11-56136954-C-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over