Variant chr14-19877198-G-A details in Genebe, Genetics Data Aggregator

Variant summary

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

The NM_001005501.2(OR4K2):c.931G>A(p.Ala311Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000317 in 1,579,594 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. A311E) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 37)

Exomes 𝑓: 0.0000028 ( 0 hom. )

Consequence

OR4K2
NM_001005501.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.0330

Variant links:

Genes affected

OR4K2 (HGNC:14728): (olfactory receptor family 4 subfamily K 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]

OR4K2 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=0.032120615).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
OR4K2	NM_001005501.2 linkuse as main transcript	c.931G>A	p.Ala311Thr	missense_variant	2/2	ENST00000641885.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Appris
OR4K2	ENST00000641885.1 linkuse as main transcript	c.931G>A	p.Ala311Thr	missense_variant	2/2	NM_001005501.2	P1
OR4K2	ENST00000298642.2 linkuse as main transcript	c.931G>A	p.Ala311Thr	missense_variant	1/1		P1
OR4K2	ENST00000641522.1 linkuse as main transcript	n.1133+814G>A		intron_variant, non_coding_transcript_variant
OR4K2	ENST00000641785.1 linkuse as main transcript	n.1133+814G>A		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152206

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:

0.0000942

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000280

AC:

AN:

1427388

Hom.:

Cov.:

AF XY:

0.00000281

AC XY:

AN XY:

711104

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:

0.0000118

Gnomad4 FIN exome

AF:

0.0000511

Gnomad4 NFE exome

AF:

9.12e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152206

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74358

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:

0.0000942

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

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

Mar 28, 2023

The c.931G>A (p.A311T) alteration is located in exon 1 (coding exon 1) of the OR4K2 gene. This alteration results from a G to A substitution at nucleotide position 931, causing the alanine (A) at amino acid position 311 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

Benign

0.067

BayesDel_addAF

Benign

-0.44

BayesDel_noAF

Benign

-0.87

CADD

Benign

0.47

DANN

Benign

0.19

DEOGEN2

Benign

0.0034

T;T

Eigen

Benign

-1.6

Eigen_PC

Benign

-1.6

FATHMM_MKL

Benign

0.031

LIST_S2

Benign

0.39

.;T

M_CAP

Benign

0.0034

MetaRNN

Benign

0.032

T;T

MetaSVM

Benign

-0.91

MutationAssessor

Benign

0.0

N;N

MutationTaster

Benign

1.0

PrimateAI

Benign

0.25

PROVEAN

Benign

0.89

.;N

REVEL

Benign

0.026

Sift

Benign

0.77

.;T

Sift4G

Benign

0.63

.;T

Polyphen

0.0

B;B

Vest4

0.082

MutPred

0.18

Gain of disorder (P = 0.1556);Gain of disorder (P = 0.1556);

MVP

0.14

MPC

.;5.81669046081E-4

ClinPred

0.035

GERP RS

-5.8

Varity_R

0.021

gMVP

0.097

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