chr10-93593825-T-C

Position:

chr10-93593825-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 4P and 2B. PM1PM2BP4_Moderate

The NM_006744.4(RBP4):c.566A>G(p.Asn189Ser) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000137 in 1,459,328 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 18/23 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. N189N) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000014 ( 0 hom. )

Consequence

RBP4
NM_006744.4 missense, splice_region

Scores

Splicing: ADA: 0.002226

Clinical Significance

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

Conservation

PhyloP100: 2.59

Variant links:

Genes affected

RBP4 (HGNC:9922): (retinol binding protein 4) This protein belongs to the lipocalin family and is the specific carrier for retinol (vitamin A alcohol) in the blood. It delivers retinol from the liver stores to the peripheral tissues. In plasma, the RBP-retinol complex interacts with transthyretin which prevents its loss by filtration through the kidney glomeruli. A deficiency of vitamin A blocks secretion of the binding protein posttranslationally and results in defective delivery and supply to the epidermal cells. [provided by RefSeq, Jul 2008]

RBP4 links:

FFAR4 (HGNC:19061): (free fatty acid receptor 4) This gene encodes a G protein-coupled receptor (GPR) which belongs to the rhodopsin family of GPRs. The encoded protein functions as a receptor for free fatty acids, including omega-3, and participates in suppressing anti-inflammatory responses and insulin sensitizing. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Feb 2012]

FFAR4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM1

In a chain Retinol-binding protein 4 (size 182) in uniprot entity RET4_HUMAN there are 11 pathogenic changes around while only 1 benign (92%) in NM_006744.4

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.22590029).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
RBP4	NM_006744.4 linkuse as main transcript	c.566A>G	p.Asn189Ser	missense_variant, splice_region_variant	5/6	ENST00000371464.8
RBP4	NM_001323517.1 linkuse as main transcript	c.566A>G	p.Asn189Ser	missense_variant, splice_region_variant	5/6
RBP4	NM_001323518.2 linkuse as main transcript	c.560A>G	p.Asn187Ser	missense_variant, splice_region_variant	5/6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
RBP4	ENST00000371464.8 linkuse as main transcript	c.566A>G	p.Asn189Ser	missense_variant, splice_region_variant	5/6	1	NM_006744.4	P1
RBP4	ENST00000371467.5 linkuse as main transcript	c.566A>G	p.Asn189Ser	missense_variant, splice_region_variant	5/6	5		P1
RBP4	ENST00000371469.2 linkuse as main transcript	c.560A>G	p.Asn187Ser	missense_variant, splice_region_variant	5/6	5
FFAR4	ENST00000604414.1 linkuse as main transcript	c.697-10249T>C		intron_variant		3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000120

AC:

AN:

250596

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135516

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

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:

0.0000137

AC:

AN:

1459328

Hom.:

Cov.:

AF XY:

0.0000138

AC XY:

AN XY:

726018

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

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:

0.0000153

Gnomad4 OTH exome

AF:

0.0000332

GnomAD4 genome

Cov.:

Bravo

AF:

0.0000113

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 03, 2021

The c.566A>G (p.N189S) alteration is located in exon 5 (coding exon 4) of the RBP4 gene. This alteration results from a A to G substitution at nucleotide position 566, causing the asparagine (N) at amino acid position 189 to be replaced by a serine (S). 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

Oct 24, 2023

This sequence change replaces asparagine, which is neutral and polar, with serine, which is neutral and polar, at codon 189 of the RBP4 protein (p.Asn189Ser). This variant is present in population databases (rs750356617, gnomAD 0.003%). This variant has not been reported in the literature in individuals affected with RBP4-related conditions. ClinVar contains an entry for this variant (Variation ID: 839508). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. 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

0.084

BayesDel_addAF

Benign

-0.20

BayesDel_noAF

Benign

-0.45

CADD

Benign

DANN

Benign

0.95

DEOGEN2

Benign

0.22

T;T;T;T

Eigen

Benign

-0.18

Eigen_PC

Benign

0.011

FATHMM_MKL

Uncertain

0.92

LIST_S2

Benign

0.83

.;T;T;.

M_CAP

Benign

0.019

MetaRNN

Benign

0.23

T;T;T;T

MetaSVM

Benign

-0.52

MutationAssessor

Benign

1.5

L;L;.;.

MutationTaster

Benign

0.99

D;D;D

PrimateAI

Benign

0.43

PROVEAN

Benign

-1.3

N;N;.;N

REVEL

Benign

0.28

Sift

Benign

0.63

T;T;.;T

Sift4G

Benign

0.74

T;T;T;T

Polyphen

0.28

B;B;.;.

Vest4

0.47

MutPred

0.54

Gain of relative solvent accessibility (P = 0.0522);Gain of relative solvent accessibility (P = 0.0522);.;.;

MVP

0.54

MPC

0.49

ClinPred

0.12

GERP RS

6.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.35

gMVP

0.47

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.0022

dbscSNV1_RF

Benign

0.094

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