Genetic Variant OR56A3:p.Gly207Val (chr11-5947966-G-T) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_001003443.3(OR56A3):c.620G>T(p.Gly207Val) 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 1,461,840 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 (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

OR56A3
NM_001003443.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.166

Publications

0 publications found

Variant links:

Genes affected

OR56A3 (HGNC:14786): (olfactory receptor family 56 subfamily A 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]

OR56A3 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.27897882).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OR56A3	NM_001003443.3 link	c.620G>T	p.Gly207Val	missense_variant	Exon 3 of 3	ENST00000641160.1	NP_001003443.2	Q8NH54A0A126GWL6
OR56A3	XM_047426926.1 link	c.620G>T	p.Gly207Val	missense_variant	Exon 3 of 6		XP_047282882.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OR56A3	ENST00000641160.1 link	c.620G>T	p.Gly207Val	missense_variant	Exon 3 of 3	NM_001003443.3	ENSP00000493059.1	Q8NH54
OR56A3	ENST00000641905.1 link	c.620G>T	p.Gly207Val	missense_variant	Exon 4 of 4		ENSP00000493319.1	Q8NH54
OR56A3	ENST00000641878.1 link	n.402-721G>T		intron_variant	Intron 2 of 2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461840

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727234

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33478

American (AMR)

AF:

0.00

AC:

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53386

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1112002

Other (OTH)

AF:

0.00

AC:

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.450

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 11, 2022

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.620G>T (p.G207V) alteration is located in exon 1 (coding exon 1) of the OR56A3 gene. This alteration results from a G to T substitution at nucleotide position 620, causing the glycine (G) at amino acid position 207 to be replaced by a valine (V). 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

0.15

BayesDel_addAF

Benign

-0.045

BayesDel_noAF

Benign

-0.30

CADD

Benign

(source)

DANN

Benign

0.84

DEOGEN2

Benign

0.034

T;T;T

Eigen

Benign

-0.43

Eigen_PC

Benign

-0.36

FATHMM_MKL

Benign

0.096

LIST_S2

Benign

0.78

.;.;T

M_CAP

Benign

0.0075

MetaRNN

Benign

0.28

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.2

L;L;L

PhyloP100

-0.17

PrimateAI

Benign

0.24

PROVEAN

Benign

-1.4

.;.;N

REVEL

Benign

0.21

Sift

Benign

0.12

.;.;T

Sift4G

Benign

0.12

.;.;T

Polyphen

0.0060

B;B;B

Vest4

0.12

MutPred

0.61

Loss of catalytic residue at T209 (P = 0.304);Loss of catalytic residue at T209 (P = 0.304);Loss of catalytic residue at T209 (P = 0.304);

MVP

0.62

MPC

0.12

ClinPred

0.22

GERP RS

5.1

Varity_R

0.32

gMVP

0.43

Mutation Taster

=82/18

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over