chr17-3278505-C-T

Position:

chr17-3278505-C-T

Variant summary

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

The ENST00000573901.3(OR3A2):c.413G>A(p.Arg138His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000341 in 1,613,826 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 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. R138C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 28)

Exomes 𝑓: 0.000033 ( 1 hom. )

Consequence

OR3A2
ENST00000573901.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -1.09

Variant links:

Genes affected

OR3A2 (HGNC:8283): (olfactory receptor family 3 subfamily A 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]

OR3A2 links:

Genome browser will be placed here

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=0.038713425).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
OR3A2	NM_002551.5 linkuse as main transcript	c.413G>A	p.Arg138His	missense_variant	5/5	ENST00000573901.3
OR3A2	XM_047436157.1 linkuse as main transcript	c.437G>A	p.Arg146His	missense_variant	7/7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
OR3A2	ENST00000573901.3 linkuse as main transcript	c.413G>A	p.Arg138His	missense_variant	5/5	3	NM_002551.5	P1
OR3A2	ENST00000641164.1 linkuse as main transcript	c.413G>A	p.Arg138His	missense_variant	1/1			P1
OR3A2	ENST00000642052.1 linkuse as main transcript	c.413G>A	p.Arg138His	missense_variant	2/2			P1

Frequencies

GnomAD3 genomes

AF:

0.0000461

AC:

AN:

151828

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000197

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000578

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000115

AC:

AN:

251166

Hom.:

AF XY:

0.0000957

AC XY:

AN XY:

135818

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000491

Gnomad ASJ exome

AF:

0.0000993

Gnomad EAS exome

AF:

0.000109

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000528

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.0000328

AC:

AN:

1461880

Hom.:

Cov.:

AF XY:

0.0000371

AC XY:

AN XY:

727240

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000537

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.0000756

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.00000719

Gnomad4 OTH exome

AF:

0.0000828

GnomAD4 genome

AF:

0.0000461

AC:

AN:

151946

Hom.:

Cov.:

AF XY:

0.0000539

AC XY:

AN XY:

74270

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000197

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000579

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000434

Hom.:

Bravo

AF:

0.0000718

ExAC

AF:

0.0000659

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

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

Apr 25, 2022

The c.431G>A (p.R144H) alteration is located in exon 1 (coding exon 1) of the OR3A2 gene. This alteration results from a G to A substitution at nucleotide position 431, causing the arginine (R) at amino acid position 144 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

0.082

BayesDel_addAF

Benign

-0.60

BayesDel_noAF

Benign

-0.76

CADD

Benign

6.3

DANN

Benign

0.75

DEOGEN2

Benign

0.011

.;.;T

Eigen

Benign

-0.99

Eigen_PC

Benign

-0.93

FATHMM_MKL

Benign

0.064

LIST_S2

Benign

0.46

.;T;T

M_CAP

Benign

0.0011

MetaRNN

Benign

0.039

T;T;T

MetaSVM

Benign

-0.97

MutationAssessor

Benign

-0.055

.;.;N

MutationTaster

Benign

1.0

PrimateAI

Benign

0.17

PROVEAN

Benign

-1.5

.;.;N

REVEL

Benign

0.028

Sift

Benign

0.60

.;.;T

Sift4G

Benign

0.47

.;.;T

Polyphen

0.016

.;.;B

Vest4

0.036

MutPred

0.62

.;.;Loss of MoRF binding (P = 0.0547);

MVP

0.22

MPC

0.92

ClinPred

0.015

GERP RS

-0.37

Varity_R

0.064

gMVP

0.13

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