4-121330434-A-G

Position:

chr4-121330434-A-G

Variant summary

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

The NM_198179.3(QRFPR):c.887T>C(p.Ile296Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000311 in 1,607,534 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000030 ( 0 hom. )

Consequence

QRFPR
NM_198179.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 1.91

Variant links:

Genes affected

QRFPR (HGNC:15565): (pyroglutamylated RFamide peptide receptor) Enables G protein-coupled receptor activity. Involved in G protein-coupled receptor signaling pathway. Predicted to be located in non-motile cilium. Predicted to be integral component of plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

QRFPR 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=0.044744432).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
QRFPR	NM_198179.3 linkuse as main transcript	c.887T>C	p.Ile296Thr	missense_variant	5/6	ENST00000394427.3	NP_937822.2	Q96P65

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
QRFPR	ENST00000394427.3 linkuse as main transcript	c.887T>C	p.Ile296Thr	missense_variant	5/6	1	NM_198179.3	ENSP00000377948.2	Q96P65
QRFPR	ENST00000334383.9 linkuse as main transcript	c.774T>C	p.Asp258Asp	synonymous_variant	5/6	2		ENSP00000335610.5	J3KNR3
QRFPR	ENST00000507331.5 linkuse as main transcript	n.*445T>C		non_coding_transcript_exon_variant	6/7	2		ENSP00000423369.1	F2Z3L3
QRFPR	ENST00000507331.5 linkuse as main transcript	n.*445T>C		3_prime_UTR_variant	6/7	2		ENSP00000423369.1	F2Z3L3

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152222

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

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:

0.0000441

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000279

AC:

AN:

250894

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135572

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.000116

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:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000295

AC:

AN:

1455194

Hom.:

Cov.:

AF XY:

0.0000359

AC XY:

AN XY:

724404

show subpopulations

Gnomad4 AFR exome

AF:

0.0000300

Gnomad4 AMR exome

AF:

0.0000671

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000244

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000459

AC:

AN:

152340

Hom.:

Cov.:

AF XY:

0.0000537

AC XY:

AN XY:

74494

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000142

Hom.:

Bravo

AF:

0.0000340

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 20, 2024

The c.887T>C (p.I296T) alteration is located in exon 5 (coding exon 5) of the QRFPR gene. This alteration results from a T to C substitution at nucleotide position 887, causing the isoleucine (I) at amino acid position 296 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 30, 2022

This sequence change replaces isoleucine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 296 of the QRFPR protein (p.Ile296Thr). This variant is present in population databases (rs529884128, gnomAD 0.009%). This variant has not been reported in the literature in individuals affected with QRFPR-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The threonine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.081

BayesDel_addAF

Benign

-0.31

BayesDel_noAF

Benign

-0.49

CADD

Benign

5.9

DANN

Benign

0.82

DEOGEN2

Benign

0.014

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.73

LIST_S2

Benign

0.58

M_CAP

Benign

0.012

MetaRNN

Benign

0.045

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.93

PrimateAI

Benign

0.30

PROVEAN

Benign

1.1

REVEL

Benign

0.12

Sift

Benign

0.44

Sift4G

Benign

0.11

Polyphen

0.011

Vest4

0.29

MVP

0.34

MPC

0.024

ClinPred

0.028

GERP RS

-3.7

Varity_R

0.074

gMVP

0.44

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