1-207468703-C-G

Position:

chr1-207468703-C-G

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_001006658.3(CR2):c.622C>G(p.Pro208Ala) variant causes a missense change. The variant allele was found at a frequency of 0.0000204 in 1,613,872 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic 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. P208S) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

CR2
NM_001006658.3 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 4.21

Variant links:

Genes affected

CR2 (HGNC:2336): (complement C3d receptor 2) This gene encodes a membrane protein, which functions as a receptor for Epstein-Barr virus (EBV) binding on B and T lymphocytes. Genetic variations in this gene are associated with susceptibility to systemic lupus erythematosus type 9 (SLEB9). Alternatively spliced transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Sep 2009]

CR2 links:

CR2 (HGNC:):

CR2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.983

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CR2	NM_001006658.3 linkuse as main transcript	c.622C>G	p.Pro208Ala	missense_variant	3/20	ENST00000367057.8	NP_001006659.1	P20023-3
CR2	NM_001877.5 linkuse as main transcript	c.622C>G	p.Pro208Ala	missense_variant	3/19		NP_001868.2	P20023-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CR2	ENST00000367057.8 linkuse as main transcript	c.622C>G	p.Pro208Ala	missense_variant	3/20	1	NM_001006658.3	ENSP00000356024.3		P20023-3

Frequencies

GnomAD3 genomes

AF:

0.0000657

AC:

AN:

152126

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000193

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.0000159

AC:

AN:

251416

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135878

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000157

AC:

AN:

1461746

Hom.:

Cov.:

AF XY:

0.00000963

AC XY:

AN XY:

727176

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000756

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.000265

GnomAD4 genome

AF:

0.0000657

AC:

AN:

152126

Hom.:

Cov.:

AF XY:

0.0000942

AC XY:

AN XY:

74334

show subpopulations

Gnomad4 AFR

AF:

0.000193

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000192

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000479

Bravo

AF:

0.0000718

ExAC

AF:

0.0000165

AC:

Asia WGS

AF:

0.00144

AC:

AN:

3478

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

May 29, 2024

The c.622C>G (p.P208A) alteration is located in exon 3 (coding exon 3) of the CR2 gene. This alteration results from a C to G substitution at nucleotide position 622, causing the proline (P) at amino acid position 208 to be replaced by an alanine (A). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Immunodeficiency, common variable, 7

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 04, 2022

This sequence change replaces proline, which is neutral and non-polar, with alanine, which is neutral and non-polar, at codon 208 of the CR2 protein (p.Pro208Ala). This variant is present in population databases (rs769415969, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with CR2-related conditions. ClinVar contains an entry for this variant (Variation ID: 937446). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). 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

Uncertain

0.43

BayesDel_addAF

Uncertain

0.038

BayesDel_noAF

Uncertain

0.050

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.48

T;.;.

Eigen

Uncertain

0.56

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Uncertain

0.92

LIST_S2

Uncertain

0.87

D;D;D

M_CAP

Uncertain

0.10

MetaRNN

Pathogenic

0.98

D;D;D

MetaSVM

Uncertain

0.77

MutationAssessor

Pathogenic

3.1

M;M;.

PrimateAI

Benign

0.34

PROVEAN

Pathogenic

-6.2

D;D;D

REVEL

Uncertain

0.55

Sift

Benign

0.030

D;D;D

Sift4G

Uncertain

0.018

D;D;D

Polyphen

1.0

D;D;D

Vest4

0.61

MutPred

0.90

Loss of catalytic residue at P207 (P = 0.0191);Loss of catalytic residue at P207 (P = 0.0191);Loss of catalytic residue at P207 (P = 0.0191);

MVP

0.89

MPC

0.67

ClinPred

0.59

GERP RS

5.8

Varity_R

0.20

gMVP

0.79

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