Genetic Variant RTP3:p.Ile122Met (chr3-46500566-T-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_031440.2(RTP3):c.366T>G(p.Ile122Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000213 in 1,614,058 control chromosomes in the GnomAD database, including 1 homozygotes. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00022 ( 1 hom. )

Consequence

RTP3
NM_031440.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.792

Variant links:

Genes affected

RTP3 (HGNC:15572): (receptor transporter protein 3) Predicted to enable olfactory receptor binding activity. Involved in detection of chemical stimulus involved in sensory perception of bitter taste and protein targeting to membrane. Located in cytoplasm. [provided by Alliance of Genome Resources, Apr 2022]

RTP3 links:

Genome browser will be placed here

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
RTP3	NM_031440.2 link	c.366T>G	p.Ile122Met	missense_variant	Exon 2 of 2	ENST00000296142.4	NP_113628.1	Q9BQQ7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RTP3	ENST00000296142.4 link	c.366T>G	p.Ile122Met	missense_variant	Exon 2 of 2	1	NM_031440.2	ENSP00000296142.3		Q9BQQ7
RTP3	ENST00000684260.1 link	c.366T>G	p.Ile122Met	missense_variant	Exon 3 of 3			ENSP00000507138.1		Q9BQQ7

Frequencies

GnomAD3 genomes

AF:

0.000125

AC:

AN:

152180

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:

0.000279

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000557

AC:

AN:

251484

Hom.:

AF XY:

0.0000515

AC XY:

AN XY:

135916

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:

0.000114

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000222

AC:

324

AN:

1461878

Hom.:

Cov.:

AF XY:

0.000215

AC XY:

156

AN XY:

727244

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

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:

0.000285

Gnomad4 OTH exome

AF:

0.0000993

GnomAD4 genome

AF:

0.000125

AC:

AN:

152180

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74346

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:

0.000279

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000116

Hom.:

Bravo

AF:

0.000121

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000330

AC:

EpiCase

AF:

0.000327

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Oct 12, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.366T>G (p.I122M) alteration is located in exon 2 (coding exon 2) of the RTP3 gene. This alteration results from a T to G substitution at nucleotide position 366, causing the isoleucine (I) at amino acid position 122 to be replaced by a methionine (M). 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

0.37

BayesDel_addAF

Benign

-0.24

BayesDel_noAF

Benign

-0.34

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.24

Eigen

Benign

0.027

Eigen_PC

Benign

-0.23

FATHMM_MKL

Benign

0.46

LIST_S2

Benign

0.74

M_CAP

Benign

0.0086

MetaRNN

Uncertain

0.65

MetaSVM

Benign

-0.97

MutationAssessor

Pathogenic

3.4

PrimateAI

Uncertain

0.53

PROVEAN

Uncertain

-2.9

REVEL

Benign

0.15

Sift

Uncertain

0.0010

Sift4G

Uncertain

0.0040

Polyphen

1.0

Vest4

0.64

MVP

0.21

MPC

0.37

ClinPred

0.66

GERP RS

-0.34

Varity_R

0.58

gMVP

0.25

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