Genetic Variant C5AR2:p.Arg147Trp (chr19-47341238-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

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

The NM_001271749.2(C5AR2):c.439C>T(p.Arg147Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000655 in 1,602,090 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 11/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000085 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000063 ( 0 hom. )

Consequence

C5AR2
NM_001271749.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.293

Variant links:

Genes affected

C5AR2 (HGNC:4527): (complement C5a receptor 2) This gene encodes a G-protein coupled receptor 1 family member involved in the complement system of the innate immune response. Unlike classical G-protein coupled receptors, the encoded protein does not associate with intracellular G-proteins. It may instead modulate signal transduction through the beta-arrestin pathway, and may alternatively act as a decoy receptor. This gene may be involved in coronary artery disease and in the pathogenesis of sepsis. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2012]

C5AR2 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=0.016866267).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
C5AR2	NM_001271749.2 link	c.439C>T	p.Arg147Trp	missense_variant	Exon 2 of 2	ENST00000595464.3	NP_001258678.1	Q9P296
C5AR2	NM_001271750.2 link	c.439C>T	p.Arg147Trp	missense_variant	Exon 2 of 2		NP_001258679.1	Q9P296
C5AR2	NM_018485.3 link	c.439C>T	p.Arg147Trp	missense_variant	Exon 2 of 2		NP_060955.1	Q9P296

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
C5AR2	ENST00000595464.3 link	c.439C>T	p.Arg147Trp	missense_variant	Exon 2 of 2	1	NM_001271749.2	ENSP00000472620.1		Q9P296
C5AR2	ENST00000600626.1 link	c.439C>T	p.Arg147Trp	missense_variant	Exon 2 of 2	1		ENSP00000471184.1		Q9P296

Frequencies

GnomAD3 genomes

AF:

0.0000854

AC:

AN:

152152

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00115

Gnomad EAS

AF:

0.000773

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000136

AC:

AN:

241944

Hom.:

AF XY:

0.000129

AC XY:

AN XY:

131684

show subpopulations

Gnomad AFR exome

AF:

0.0000624

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000299

Gnomad EAS exome

AF:

0.00115

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000711

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000635

AC:

AN:

1449820

Hom.:

Cov.:

AF XY:

0.0000679

AC XY:

AN XY:

721758

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.000536

Gnomad4 EAS exome

AF:

0.000277

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000486

Gnomad4 OTH exome

AF:

0.000182

GnomAD4 genome

AF:

0.0000854

AC:

AN:

152270

Hom.:

Cov.:

AF XY:

0.0000940

AC XY:

AN XY:

74438

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00115

Gnomad4 EAS

AF:

0.000775

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000157

Hom.:

Bravo

AF:

0.0000642

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000165

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jul 08, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.439C>T (p.R147W) alteration is located in exon 2 (coding exon 1) of the C5AR2 gene. This alteration results from a C to T substitution at nucleotide position 439, causing the arginine (R) at amino acid position 147 to be replaced by a tryptophan (W). 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

0.17

BayesDel_addAF

Benign

-0.50

BayesDel_noAF

Benign

-0.52

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.24

T;T

Eigen

Benign

-0.64

Eigen_PC

Benign

-0.79

FATHMM_MKL

Benign

0.13

LIST_S2

Benign

0.52

.;T

M_CAP

Benign

0.012

MetaRNN

Benign

0.017

T;T

MetaSVM

Benign

-0.96

MutationAssessor

Pathogenic

3.1

M;M

PrimateAI

Benign

0.46

Sift4G

Uncertain

0.023

D;D

Polyphen

0.32

B;B

Vest4

0.16

MVP

0.32

MPC

0.28

ClinPred

0.086

GERP RS

0.92

Varity_R

0.066

gMVP

0.57

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